Library

Only Methods Appearing in this Library are Bona Fide Methods Developed and Produced by the Standing Committee of Analysts

We no longer Develop and Produce Methods for sediments, soils (including contaminated land)

  1. Methods for the Examination of Waters and Associated Materials 1980

    Emission Spectrophotometric Multielement Methods of Analysis for Waters, Sediments and other Materials of Interest to the Water Industry

  2. Methods for the Examination of Waters and Associated Materials 1976

    Cadmium in potable waters by atomic absorption spectrophotometry

  3. Methods for the Examination of Waters and Associated Materials 1976

    Lead in potable waters by atomic absorption spectrophotometry

  4. Methods for the Examination of Waters and Associated Materials 1977

    Chemical Oxygen Demand (Dichromate Value) of Polluted and Waste Waters

  5. Methods for the Examination of Waters and Associated Materials 1977

    Amenability of sewage sludge to anaerobic digestion

  6. Methods for the Examination of Waters and Associated Materials 1977

    The sampling and initial preparation of sewage and waterworks’ sludge, soils, sediments and plant materials prior to analysis
    (Superseded by bluebook 89)

  7. Methods for the Examination of Waters and Associated Materials 1977

    Determination of the pH value of sludge, soil, mud and sediment; and lime requirement of soil

  8. Methods for the Examination of Waters and Associated Materials 1977

    Magnesium in waters and sewage effluents by atomic absorption spectrophotometry

  9. Methods for the Examination of Waters and Associated Materials 1977

    Calcium waters and sewage effluents by atomic absorption spectrophotometry

  10. Methods for the Examination of Waters and Associated Materials 1978

    Mercury in waters, effluents and sludges by flameless atomic absorption spectrophotometry

  11. Methods for the Examination of Waters and Associated Materials 1977

    Iron in raw and potable waters by spectrophotometry using 2 4 6 tripyridyl 1 3 5 triazine

  12. Methods for the Examination of Waters and Associated Materials 1977

    Manganese in raw and potable waters by spectrophotometry (using formaldoxime)

  13. Methods for the Examination of Waters and Associated Materials 1978

    Organochlorine insecticides and polychlorinated biphenyls in waters

  14. Methods for the Examination of Waters and Associated Materials 1978

    The Measurement of Electrical Conductivity and the Laboratory Determination of the pH Value of Natural, Treated and Waste Waters

  15. Methods for the Examination of Waters and Associated Materials 1978

    The Determination of Material Extractable by Carbon Tetrachloride and of certain Hydrocarbon Oil and Grease Components in Sewage Sludge

  16. Methods for the Examination of Waters and Associated Materials 1979

    Dissolved Oxygen in Natural and Waste Waters

  17. Methods for the Examination of Waters and Associated Materials 1978

    Arsenic in Potable and Sea Water by Spectrophotometry (Arsenomolybdenum Blue Procedure) Tentative Method

  18. Methods for the Examination of Waters and Associated Materials 1978

    Methods of Biological Sampling Handnet Sampling of Aquatic Benthic Macroinvertebrates

  19. Methods for the Examination of Waters and Associated Materials 1979

    The Instrumental Determination of Total Organic Carbon, Total Oxygen Demand and Related Determinands

  20. Methods for the Examination of Waters and Associated Materials 1979

    Atomic Absorption Spectrophotometry (An Essay Review)

  21. Methods for the Examination of Waters and Associated Materials 1979

    Determination of Volatile Fatty Acids in Sewage Sludge

  22. Methods for the Examination of Waters and Associated Materials 1979

    The Analysis of Sludge Digester Gas

  23. Methods for the Examination of Waters and Associated Materials 1979

    Acid Soluble Aluminium in Raw and Potable Waters by Spectrophotometry using pyrocatechol violet (Tentative Method)

  24. Methods for the Examination of Waters and Associated Materials 1979

    Air Segmented Continuous Flow Automatic Analysis in the Laboratory (An Essay Review)

  25. Methods for the Examination of Waters and Associated Materials 1980

    General Principles of Sampling and Accuracy of Results Part 1
    General Principles of Sampling and Accuracy of Results Part 2
    General Principles of Sampling and Accuracy of Results Part 3
    General Principles of Sampling and Accuracy of Results Part 4

  26. Methods for the Examination of Waters and Associated Materials 1979

    Sulphate in Waters, Effluents and Solids Part 1

  27. Methods for the Examination of Waters and Associated Materials 1980

    Chemical Disinfecting Agents in Waters and Effluents, and Chlorine Demand
    (Superseded by bluebook 218)

  28. Methods for the Examination of Waters and Associated Materials 1980

    Chromium in Raw and Potable Waters and Sewage Effluents

  29. Methods for the Examination of Waters and Associated Materials 1980

    A Survey of Multielement and Related Methods of Analysis for Waters, Sediments and Other Materials if Interest to the Water Industry

  30. Methods for the Examination of Waters and Associated Materials 1980

    Ultraviolet and Visible Solution Spectrophotometry and Colorimetry

  31. Methods for the Examination of Waters and Associated Materials 1980

    Zinc in Potable Waters by Atomic Absorption Spectrophotometry

  32. Methods for the Examination of Waters and Associated Materials 1980

    Copper in Potable Waters by Atomic Absorption Spectrophotometry

  33. Methods for the Examination of Waters and Associated Materials 1981

    Bromide in Waters High Level Titrimetric Method

  34. Methods for the Examination of Waters and Associated Materials 1980

    Chloro- and Bromo- Trihalogenated Methanes in Water

  35. Methods for the Examination of Waters and Associated Materials 1980

    Dissolved Potassium in Raw and Potable Waters (Tentative Methods

  36. Methods for the Examination of Waters and Associated Materials 1980

    Dissolved Sodium in Raw and Potable Waters (Tentative Methods)

  37. Methods for the Examination of Waters and Associated Materials 1980

    Silicon in Waters and Effluents

  38. Methods for the Examination of Waters and Associated Materials 1980

    Phosphorus in Waters, Effluents and Sewages

  39. Methods for the Examination of Waters and Associated Materials 1980

    Boron in Waters, Effluents, Sewage and some Solids

  40. Methods for the Examination of Waters and Associated Materials 1981

    Oxidised Nitrogen in Waters

  41. Methods for the Examination of Waters and Associated Materials 1980

    Odour and Taste in Raw and Potable Waters
    (Superseded by bluebook 156)
    (Superseded by bluebook 171)
    (Superseded by bluebook 196)
    (Superseded by bluebook 197)
    (Superseded by bluebook 233)

  42. Methods for the Examination of Waters and Associated Materials 1981

    Hydrazine in Waters Spectrophotometric Method

  43. Methods for the Examination of Waters and Associated Materials 1981

    Total Hardness, Calcium Hardness and Magnesium Hardness in Raw and Potable Waters by EDTA Titrimetry

  44. Methods for the Examination of Waters and Associated Materials 1981

    The Determination of Alkalinity and Acidity in Water

  45. Methods for the Examination of Waters and Associated Materials 1981

    Cobalt in Potable Waters

  46. Methods for the Examination of Waters and Associated Materials 1981

    Nickel in Potable Waters

  47. Methods for the Examination of Waters and Associated Materials 1981

    Analysis of Surfactants in Waters, Wastewaters and Sludges

  48. Methods for the Examination of Waters and Associated Materials 1981

    Ammonia in Waters

  49. Methods for the Examination of Waters and Associated Materials 1981

    Cadmium, Chromium, Copper, Lead, Nickel and Zinc in Sewage Sludges by Nitric Acid/AAS

  50. Methods for the Examination of Waters and Associated Materials 1981

    Phenols in Waters and Effluents by Gas-Liquid Chromatography, 4-aminoantipyrine or 3-methyl-2-benzothiazoline hydrazone

  51. Methods for the Examination of Waters and Associated Materials 1981

    Chloride in Waters, Sewage and Effluents

  52. Methods for the Examination of Waters and Associated Materials 1981

    Quantitative Samplers for Benthic Macroinvertebrates in Shallow Flowing Waters

  53. Methods for the Examination of Waters and Associated Materials 1981

    Pyrethrins and Permethrin in Potable Waters by Electron-Capture Gas Chromatography

  54. Methods for the Examination of Waters and Associated Materials 1981

    Biochemical Oxygen Demand
    (Superseded by bluebook 130)

  55. Methods for the Examination of Waters and Associated Materials 1981

    The assessment of the Nitrifying Ability of Activated Sludge (Tentative Methods)

  56. Methods for the Examination of Waters and Associated Materials 1982

    Antimony in Effluents and Raw, Potable and Sea Waters by Spectrophotometry (Using Crystal Violet) (Tentative Method)

  57. Methods for the Examination of Waters and Associated Materials 1979

    Determination of Cation Exchange Capacity and Exchangeable Cations (Including Water Soluable Ions) in Soils, Related Materials and Sewage Sludge

  58. Methods for the Examination of Waters and Associated Materials 1982

    Gas Chromatography – an Essay Review

  59. Methods for the Examination of Waters and Associated Materials 1981

    The Determination of Alkali Extractable Organic Matter in Ash

  60. Methods for the Examination of Waters and Associated Materials 1980

    Organo-Phosphorus Pesticides in River and Drinking Water (Tentative Method)

  61. Methods for the Examination of Waters and Associated Materials 1981

    Assessment of Biodegradability

  62. Methods for the Examination of Waters and Associated Materials 1982

    Fluoride in Waters, Effluents, Sludges, Plants and Soils

  63. Methods for the Examination of Waters and Associated Materials 1982

    Methods for the Isolation and Identification of Salmonellae (other than Salmonella Typhi) from Water and Associated Materials

  64. Methods for the Examination of Waters and Associated Materials 1981

    Acute Toxicity Testing with Aquatic Organisms

  65. Methods for the Examination of Waters and Associated Materials 1980

    The Determination of Chlorophyll a in Aquatic Environments

  66. Methods for the Examination of Waters and Associated Materials 1982

    The Bacteriological Examination of Drinking Water Supplies (Report on Public Health and Medical Subjects NO. 71)

  67. Methods for the Examination of Waters and Associated Materials 1982

    Gas Chromatographic and Associated Methods for the Characterization of Oils, Fats, Waxes and Tars

  68. Methods for the Examination of Waters and Associated Materials 1982

    Silver in Waters, Sewages and Effluents by Atomic Absorption Spectrophotometry

  69. Methods for the Examination of Waters and Associated Materials 1982

    Arsenic in Potable Waters by Atomic Absorption Spectrophotometry (Semi Automatic Method)

  70. Methods for the Examination of Waters and Associated Materials 1981

    Molybdenum, especially in Sewage Sludges and Soils by Spectrophotometry

  71. Methods for the Examination of Waters and Associated Materials 1981

    Extractable
    Metals in Soils, Sewage Sludge-treated Soils and Related Materials

  72. Methods for the Examination of Waters and Associated Materials 1981

    Formaldehyde, Methanol and Related Compounds in Raw, Waste and Potable Waters (Tentative Methods)

  73. Methods for the Examination of Waters and Associated Materials 1983

    Sulphide in Waters and Effluents (Tentative Methods)

  74. Methods for the Examination of Waters and Associated Materials 1982

    Sampling of Non-planktonic Algae (Benthic Algae or Priphyton)

  75. Methods for the Examination of Waters and Associated Materials 1983

    High Performance Liquid Chromatography, Ion Chromatography, Thin Layer and Column Chromatography of Water Samples

  76. Methods for the Examination of Waters and Associated Materials 1983

    Iron and Manganese in Potable Waters by Atomic Absorption Spectrophotometry

  77. Methods for the Examination of Waters and Associated Materials 1983

    Determination of Hydrocarbon Oils in Waters by Solvent Extraction, Infra Red Absorption and Gravimetry

  78. Methods for the Examination of Waters and Associated Materials 1983

    Classical Methods for the Characterization of Oils, Fats and Waxes by Saponification, Hydroxyl, Iodine and Acid Values

  79. Methods for the Examination of Waters and Associated Materials 1983

    Methods for Biological Sampling: Sampling of Benthic Macroinvertebrates in Deep Rivers

  80. Methods for the Examination of Waters and Associated Materials 1984

    The Determination of Iodide, Iodate, Iodide and Traces of Bromide in Waters (Tentative Methods)

  81. Methods for the Examination of Waters and Associated Materials 1984

    Four Essay Reviews on Applications of Radiation Measurement in the Water Industry

  82. Methods for the Examination of Waters and Associated Materials 1978

    Methods for the Examination of Waters and Associated Materials 1984

    The Determination of Organochlorine Insecticides and Polychlorinated Biphenyls in Sewages, Sludges, Muds and Fish
    Organochlorine Insecticides and Polochlorinated Biphenyls in Water, and addition, 1984

  83. Methods for the Examination of Waters and Associated Materials 1984

    The Conditionability, Filterability, Settleability and Solids Content of Sludge (A Compendium of Methods and Tests)

  84. Methods for the Examination of Waters and Associated Materials 1983

    Methods of Biological Sampling: Sampling Macro-invertebrates in Water Supply Systems

  85. Methods for the Examination of Waters and Associated Materials 1983

    Methods of Biological Sampling: A Colonization Sampler for Collecting Macro-invertebrate Indicators of Water Quality in Lowland Rivers

  86. Methods for the Examination of Waters and Associated Materials 1983

    Thin Layer Chromatographic Characterization of Oils, Fats, Waxes and Tars

  87. Methods for the Examination of Waters and Associated Materials 1984

    Urea in Waters

  88. Methods for the Examination of Waters and Associated Materials 1984

    The Direct Determination of Biomass of Aquatic Macrophytes and Measurement of Underwater Light

  89. Methods for the Examination of Waters and Associated Materials 1986

    The Sampling and Initial Preparation of Sewage and Waterworks’ Sludges, Soils, Sediments, Plant Materials and Contaminated Wildlife Prior to Analysis (Second Edition)

  90. Methods for the Examination of Waters and Associated Materials 1985

    Chlorophenoxy Acidic Herbicides Trichlorobenzoic Acid, Chlorophenols Triazines and Glyphosate in Water

  91. Methods for the Examination of Waters and Associated Materials 1985

    Total Nitrogen and Total Phosphorus in Sewage Sludge

  92. Methods for the Examination of Waters and Associated Materials 1985

    Mercury in Waters, Effluent, Soils and Sediments etc, Additional Methods

  93. Methods for the Examination of Waters and Associated Materials 1986

    Methods for the Determination of Metals in Soils, Sediments and Sewage Sludge and Plants by Hydrochloric-Nitric Acid Digestion, with a note on the Determination of the Insoluble Metal Contents

  94. Methods for the Examination of Waters and Associated Materials 1985-86

    Measurement of Alpha and Beta Activity of Water and Sludge Samples
    The Determination of Radon-222 and Radium-226
    The Determination of Uranium (including General X-ray Fluorescent Spectrometric Analysis)

  95. Methods for the Examination of Waters and Associated Materials 1985

    Organo-Phosphorus Pesticides in Sewage Sludge; Organo-Phosphorus Pesticides in River and Drinking Water, an addition

  96. Methods for the Examination of Waters and Associated Materials 1985

    Chlorobenzenes in Water, Organochlorine Pesticides and PCBs in Turbid Waters, Halogenated Solvents and Related Compounds in Sewage Sludge and Waters

  97. Methods for the Examination of Waters and Associated Materials 1986

    Chemical Oxygen Demand (Dichromate Value) of Polluted and Waste Waters (Second Edition)

  98. Methods for the Examination of Waters and Associated Materials 1986

    The Determination of Carbon Dioxide in Natural, Treated and Beverage Waters
    Waters With a Supplement on Sampling Bottled and Canned Waters

  99. Methods for the Examination of Waters and Associated Materials 1984

    Selenium in Waters 1984
    Selenium and Arsenic in Sludges, Soils, and Related Materials (1985)
    A Note on the USe of Hydride Generator Kits (1987)

  100. Methods for the Examination of Waters and Associated Materials 1985

    Determination of Sulphite, Sulphur Dioxide, Thiosulphate and Thiocyanate, with Notes on the Determination of Total Sulphur and Other Sulphur Compounds

  101. Methods for the Examination of Waters and Associated Materials 1985

    Material Extractable by Light Petroleum from Sewage Sludge (Tentative Method)

  102. Methods for the Examination of Waters and Associated Materials 1986

    Determination of Inhibitory Effects of Chemcials and Waste Waters and Anaerobic Digestion of Sewage Sludge

  103. Methods for the Examination of Waters and Associated Materials 1981

    Colour and Turbidity of Waters

  104. Methods for the Examination of Waters and Associated Materials 1983

    The sampling of Oils, Fats, Waxes and Tars in Aqueous and Solid Systems

  105. Methods for the Examination of Waters and Associated Materials 1980

    Suspended, Settleable, and Total Dissolved Solids in Waters and Effluents

  106. Methods for the Examination of Waters and Associated Materials 1982

    Methods for Assessing the Treatability of Chemicals and Industrial Waste Waters and their Toxicity to Sewage Treatment Processes

  107. Methods for the Examination of Waters and Associated Materials 1983

    The Permanganate Index and Permanganate Value Tests for Waters and Effluents

  108. Methods for the Examination of Waters and Associated Materials 1988-86

    Methods for the Use of Aquatic Macrophytes for Assessing Water Quality

  109. Methods for the Examination of Waters and Associated Materials 1986

    Lead and Cadmium in Fresh Waters by Atomic Absorption Spectrophotometry (Second Edition)
    A General Introduction to Electrothermal Atomization Atomic Absorption Spectrophotometry

  110. Methods for the Examination of Waters and Associated Materials 1984-5

    Determination of Very Low Concentrations of Hydrocarbons and Halogenated Hydrocarbons in Water

  111. Methods for the Examination of Waters and Associated Materials 1987

    Lithium, Magnesium, Calcium, Strontium and Barium in Waters and Sewage Effluents by Atomic Absorption Spectrophotometry

  112. Methods for the Examination of Waters and Associated Materials 1986

    Temperature Measurement for Natural, Waste and Potable Waters and other items of interest in the Water and sewage Disposal Industry

  113. Methods for the Examination of Waters and Associated Materials 1985

    The Determination of 6 Specific Polynuclear Aromatic Hydrocarbons in Waters (with notes on the determination of other PAH)

  114. Methods for the Examination of Waters and Associated Materials 1985-6

    Examining Biological Filters, Toxicity to Aerobic Bacteria, Effect of SRT and Temperature
    The Examination of Percolating Biological Waste Water Filters 1985
    The Determination of the Toxicity of Substances to Aerobic Bacteria by Measurement of Growth Inhibition, and The Assessment of the Effect of Sludge Retention Time and Temperature on the Treatability of Chemicals in the Activated Sludge Process 1986.

  115. Methods for the Examination of Waters and Associated Materials 1987

    Determination of Acrylamide Monomer in Waters and Polymers

  116. Methods for the Examination of Waters and Associated Materials 1987

    Acid Soluble Aluminium in Marine, Raw and Potable Waters (Second Edition)

  117. Methods for the Examination of Waters and Associated Materials 1987

    Determination of Diquat and Paraquat in River and Drinking Waters, Spectrophotometric Methods Tentative

  118. Methods for the Examination of Waters and Associated Materials 1987

    The Determination of Oils and Fats in Waste Water by Filtration, Solvent Extraction and Gravimetry (Tentative Method)

  119. Methods for the Examination of Waters and Associated Materials 1988

    The Determination of Colour of Waters and Wastewaters.
    A Supplementary Mehtod based upon the “CIELAB” Colour Difference Measurement System

  120. Methods for the Examination of Waters and Associated Materials 1988

    The Determination of pH in Low Ionic Strength Waters

  121. Methods for the Examination of Waters and Associated Materials 1983

    Methods for Sampling Fish Populations in Shallow Rivers and Streams

  122. Methods for the Examination of Waters and Associated Materials 1987

    The Determination of Twelve Trace Metals in Marine and other Waters by Voltammetry or AAS
    Method Not in Library

  123. Methods for the Examination of Waters and Associated Materials 1988

    The determination of Antimony, Beryllium, Chromium, Cobalt, Copper, Gallium, Germanium, Indium, Nickel, Silver, Thallium, and Vanadium, in Raw and Potable Waters by Electrothermal Atomization Atomic Absorption Spectrophotometry with Notes on the Determination of Arsenic, Selenium and Zinc by this method

  124. Methods for the Examination of Waters and Associated Materials 1988

    The Determination of Microgram and Submicrogram Amounts of Individual Phenols in River and Potable Waters

  125. Methods for the Examination of Waters and Associated Materials 1988

    The Determination of Methane and Other Hydrocarbon Gases in Water

  126. Methods for the Examination of Waters and Associated Materials 1987

    Kjeldahl Nitrogen in Waters

  127. Methods for the Examination of Waters and Associated Materials 1987

    The Determination of Carbamates, Thiocarbamates, Related Compounds and Ureas in Waters

  128. Methods for the Examination of Waters and Associated Materials 1988

    Analysis of Hydrocarbons in Waters. A Review, and An Ultra-Violet Fluorescence Spectrometric Method

  129. Methods for the Examination of Waters and Associated Materials 1988

    The Assessment of Biodegradability in Anaerobic Digesting Sludge

  130. Methods for the Examination of Waters and Associated Materials 1988

    5 Day Biochemical Oxygen Demand (BOD5) Second Edition 1988 with Dissolved Oxygen in Waters, Amendments

  131. Methods for the Examination of Waters and Associated Materials 1988

    Cyanide in Waters etc

  132. Methods for the Examination of Waters and Associated Materials 1989

    Determination of Radioactivity in Water by Multinuclide Gamma Ray Spectrometry

  133. Methods for the Examination of Waters and Associated Materials 1988

    The Tentative Identification of Volatilizable Organic Compounds by Linear Temperature Programmed Gas Chromotographic Retention Indices with Notes on
    Other Methods for Identifying Organic Substances

  134. Methods for the Examination of Waters and Associated Materials 1980/89

    Titrimetric Determination of Total and Bicarbonate Alkalinity and Volatile Fatty Acids in Sewage Sludge

  135. Methods for the Examination of Waters and Associated Materials 1988

    .The Determination of Formaldehyde, Other Volatile Aldehydes, Ketones and Alcohols in Water

  136. Methods for the Examination of Waters and Associated Materials 1988

    Sulphate in Waters, Effluents and Solids (2nd Edition)

  137. Methods for the Examination of Waters and Associated Materials 1988

    Discrete and Air Segmented Automated Methods of Analysis including Robots
    An Essay Review (Second Edition)

  138. Methods for the Examination of Waters and Associated Materials 1989

    Isolation and Identification of Giardia Cysts, Cryptosporidium Oocysts and Free Living Pathogenic Amoebae in Water etc 1989 Part 1
    Isolation and Identification of Giardia Cysts, Cryptosporidium Oocysts and Free Living Pathogenic Amoebae in Water etc 1989 Part 2

  139. Methods for the Examination of Waters and Associated Materials 1990

    The Enumeration of Algae, Estimation of Cell Volume, and Use in Bioassays

  140. Methods for the Examination of Waters and Associated Materials 1990

    The Determination of Anions and Cations, Transition Metals, Other Complex Ions and Organic Acids and Bases in Water by Chromatography

  141. Methods for the Examination of Waters and Associated Materials 1990

    Flow Injection Analysis An Essay Review and Analytical Methods

  142. Methods for the Examination of Waters and Associated Materials 1992

    The Determination of Organic, Inorganic, Total and Specific Tin Compounds in Water, Sediments and Biota

  143. Methods for the Examination of Waters and Associated Materials 1996

    General Principles of Sampling Waters and Associated Materials (second edition)

  144. Methods for the Examination of Waters and Associated Materials 1991

    Use of Plants to Monitor Heavy Metals in Freshwaters

  145. Methods for the Examination of Waters and Associated Materials 1992

    Information on Concentration and Determination Procedures in Atomic Spectrophotometry

  146. Methods for the Examination of Waters and Associated Materials 1992

    Determination of Synthetic Pyrethroid Insecticides in Waters by Gas Liquid Chromatography

  147. Methods for the Examination of Waters and Associated Materials 1992

    Phosphorus and Silicon in Waters, Effluents and Sludges

  148. Methods for the Examination of Waters and Associated Materials 1992

    Determination of the Adsorption Characteristics of Organic Test Substances in Sewage Treatment Processes (Tentative Method)

  149. Methods for the Examination of Waters and Associated Materials 1992

    Determination of the pH Value of Sludge, Soil, Mud, and Sediment; and the Lime Requirement of Soil (Second Edition)

  150. Methods for the Examination of Waters and Associated Materials 1992

    Index of Methods for the Examination of Waters and Associated Materials 1976—1992

  151. Methods for the Examination of Waters and Associated Materials 1993

    Chiorphenylid, Flucofuron and Sulcofuron in Waters (Tentative Methods)

  152. Methods for the Examination of Waters and Associated Materials 1993

    Linear Alkylbenzene Suiphonates (LAS) and Alkyiphenol Ethoxylates (APE) in Waters, Wastewaters and Sludges by High Performance Liquid Chromatography

  153. Methods for the Examination of Waters and Associated Materials 1993

    A review and methods for the use of epilithic diatoms for detecting and monitoring changes in river water quality
    Method Not in Library

  154. Methods for the Examination of Waters and Associated Materials 1994

    Determination of microcystin-LR in drinking waters by HPLC

  155. Methods for the Examination of Waters and Associated Materials 1994

    Phenylurea herbicides (urons), Dinocap, Dinoseb, Benomyl, Carbendazim and Metamitron in Waters

  156. Methods for the Examination of Waters and Associated Materials 1994

    The Determination of Taste and Odour in Potable Waters Part 2
    The Determination of Taste and Odour in Potable Waters Part 2

  157. Methods for the Examination of Waters and Associated Materials 1995

    The Instrumental Determination of Total Organic Carbon and Related Determinands Part 1
    The Instrumental Determination of Total Organic Carbon and Related Determinands Part 2

  158. Methods for the Examination of Waters and Associated Materials 1994

    Determination of Aldicarb and other N-methyl carbamates in Waters

  159. Methods for the Examination of Waters and Associated Materials 1994

    The Microbiology of Water Part 1 – Drinking Water (Part 1) (Report on Public Health and Medical Subjects NO. 71)
    The Microbiology of Water Part 1 – Drinking Water (Part 2) (Report on Public Health and Medical Subjects NO. 71)
    The Microbiology of Water Part 1 – Drinking Water (Part 3) (Report on Public Health and Medical Subjects NO. 71)
    The Microbiology of Water Part 1 – Drinking Water (Part 4) (Report on Public Health and Medical Subjects NO. 71)
    The Microbiology of Water Part 1 – Drinking Water (Part 5) (Report on Public Health and Medical Subjects NO. 71)
    The Microbiology of Water Part 1 – Drinking Water (Part 6) (Report on Public Health and Medical Subjects NO. 71)
    The Microbiology of Water Part 1 – Drinking Water (Part 7) (Report on Public Health and Medical Subjects NO. 71)

  160. Methods for the Examination of Waters and Associated Materials 1995

    Methods for the isolation and identification of human enteric viruses from waters and associated materials

  161. Methods for the Examination of Waters and Associated Materials 1996

    Method for the Isolation and Identification of Escherichia coil 0157:H7 from Waters

  162. Methods for the Examination of Waters and Associated Materials 1996

    An evaluation of presence-absence tests for coliform organisms and Escherichia coli

  163. Methods for the Examination of Waters and Associated Materials 1996

    Inductively Coupled Plasma Spectrometry

  164. Methods for the Examination of Waters and Associated Materials 1996

    Determnation of Long Alkyl Chain Quaternary Ammonium Compounds in Environmental Matrcies by High Performance Liquid Chromatography

  165. Methods for the Examination of Waters and Associated Materials 1997

    The Determination of Polynuclear Aromatic Hydrocarbons in Waters (additional methods) Part 1
    The Determination of Polynuclear Aromatic Hydrocarbons in Waters (additional methods) Part 2

  166. Methods for the Examination of Waters and Associated Materials 1997

    The Determination of Acidic, Herbicides, Bromooxynil, Ioxynil and Pentachlorophenol in Waters Part 1
    The Determination of Acidic, Herbicides, Bromooxynil, Ioxynil and Pentachlorophenol in Waters Part 2

  167. Methods for the Examination of Waters and Associated Materials 1997

    The Determination of Bromate, Chlorate and Chlorite in Waters by Ion Chromatography

  168. Methods for the Examination of Waters and Associated Materials 1998

    The determination of microcystin algal toxins in raw and treated waters by high performance liquid chromatography

  169. Methods for the Examination of Waters and Associated Materials 1998

    Evaluation trials for two media for the simultaneous detection and enumeration of Escherichia coli and coliform organisms

  170. Methods for the Examination of Waters and Associated Materials 1998

    The Determination of volatile organic compounds in waters and complex matrices by purge and tap or by headspace techniques Part 1
    The Determination of volatile organic compounds in waters and complex matrices by purge and tap or by headspace techniques Part 2

  171. Methods for the Examination of Waters and Associated Materials 1998

    The assessment of taste odour and related aesthetic problems in drinking waters (Superseded by bluebook 196)
    (Superseded by bluebook 197)
    (Superseded by bluebook 233)

  172. Methods for the Examination of Waters and Associated Materials 1999

    Isolation and idenitfication of Cryptosporidium oocysts and Giardia cysts in waters

  173. Methods for the Examination of Waters and Associated Materials 1999

    The determination of tritium (tritiated water) activity concentration by alkaline distillation and liquid scintillation counting

  174. Methods for the Examination of Waters and Associated Materials 2000

    The determination of organochlorine pesticides and polychlorinated biphenyls in waters and complex matrices

  175. Methods for the Examination of Waters and Associated Materials 2000

    The Microbiology of Recreational and Environmental Water
    Method Not in Library

  176. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 1 – Water Quality and Public Health

  177. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 2 – Practices and procedures for sampling

  178. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 3 – Practices and procedures for laboratories

  179. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 4 – Methods for the isolation and enumeration of coliform bacteria and Escherichia coli (Part 1)
    The Microbiology of Drinking Water Part 4 – Methods for the isolation and enumeration of coliform bacteria and Escherichia coli (Part 2)
    The Microbiology of Drinking Water Part 4 – Methods for the isolation and enumeration of coliform bacteria and Escherichia coli (Part 3)

  180. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 5 – A method for the isolation and enumeration of enterococci by membrane filtration

  181. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  182. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 7 – Methods for the enumeration of heterotrophic bacteria by pour and spread plate techniques

  183. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 8 – Methods for the isolation and enumeration of Aeromonas and Pseudomonas aeruginosa by membrane filtration

  184. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 9 – Methods for the isolation and enumeration of Salmonella and Shigella by selective enrichment, membrane filtration and multiple tube most probable number techniques

  185. Methods for the Examination of Waters and Associated Materials 2002

    The Microbiology of Drinking Water Part 10 – Methods for the isolation of Yersinia, Vibrio and Campylobacter by selective enrichment

  186. Methods for the Examination of Waters and Associated Materials 2003

    The determination of polycyclic aromatic hydrocarbons in soil by dichloromethane extraction using gas chromatography with mass spectrometric detection

  187. Methods for the Examination of Waters and Associated Materials 2003

    The determination of polychlorinated biphenyls by gas chromatography using mass spectrometric detection

  188. Methods for the Examination of Waters and Associated Materials 2003

    The Microbiology of Sewage Sludge Part 1 – An overview of the treatment and use in agriculture of sewage sludge in relation to its impact on the environment and public health

  189. Methods for the Examination of Waters and Associated Materials 2003

    The Microbiology of Sewage Sludge Part 2 – Practices and
    procedures for sampling and sample preparation

  190. Methods for the Examination of Waters and Associated Materials 2003

    The Microbiology of Sewage Sludge Part 3 – Methods for the isolation and enumeration of Escherichia coli, including verocytotoxigenic Escherichia coli

  191. Methods for the Examination of Waters and Associated Materials 2003

    The Microbiology of Sewage Sludge Part 4 – Methods for the detection, isolation and enumeration of Salmonellae

  192. Methods for the Examination of Waters and Associated Materials 2004

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  193. Methods for the Examination of Waters and Associated Materials 2004

    A guide to practices, procedures and methodologies following oil spill contamination incidents

  194. Methods for the Examination of Waters and Associated Materials 2004

    The Microbiology of Drinking Water Part 9 – Methods for the isolation and enumeration of Salmonella and Shigella by selective enrichment, membrane filtration and multiple tube most probable number techniques

  195. Methods for the Examination of Waters and Associated Materials 2004

    The Microbiology of Sewage Sludge Part 4 – Methods for the detection, isolation and enumeration of Salmonellae

  196. Methods for the Examination of Waters and Associated Materials 2004

    The Microbiology of Drinking Water Part 11 – Taste, odour and related aesthetic problems

  197. Methods for the Examination of Waters and Associated Materials 2004

    The Microbiology of Drinking Water Part 12 – Methods for the isolation and enumeration of micro-organisms associated with taste, odour and related aesthetic problems

  198. Methods for the Examination of Waters and Associated Materials 2005

    Guidance on the measurement of tritium in environmental samples

  199. Methods for the Examination of Waters and Associated Materials 2005

    The assessment of aerobic biodegradability by measurement of dissolved and/or gaseous inorganic carbon in sealed vessels

  200. Methods for the Examination of Waters and Associated Materials 2005

    The determination of Legionella bacteria in waters and other environmental samples Part 1 – Rationale of surveying and sampling

  201. Methods for the Examination of Waters and Associated Materials 2006

    The preparation and pre-treatment of potentially contaminated soils prior to chemical analysis

  202. Methods for the Examination of Waters and Associated Materials 2006

    The Microbiology of Drinking Water Part 5 – The isolation and enumeration of enterococci by membrane filtration

  203. Methods for the Examination of Waters and Associated Materials 2006

    The direct toxicity assessment of aqueous environmental samples using the oyster Crassostrea gigas embryo-larval development test

  204. Methods for the Examination of Waters and Associated Materials 2006

    The determination of metals in solid environmental samples

  205. Methods for the Examination of Waters and Associated Materials 2006

    The direct toxicity assessment of aqueous environmental samples using the marine copepod Tisbe battagliai lethality test

  206. Methods for the Examination of Waters and Associated Materials 2006

    The Microbiology of Drinking Water Part 9 – Methods for the isolation and enumeration of Salmonella and Shigella by selective enrichment, membrane filtration and multiple tube-most probable number techniques

  207. Methods for the Examination of Waters and Associated Materials 2006

    Determination of the inhibitory effect of chemicals, industrial and other waste waters on nitrification by Nitrosomonas bacteria

  208. Methods for the Examination of Waters and Associated Materials 2007

    The direct toxicity assessment of aqueous environmental samples using the juvenile Daphnia magna immobilisation test

  209. Methods for the Examination of Waters and Associated Materials 2007

    The direct toxicity assessment of aqueous environmental samples using the oyster (Crassostrea gigas) embryo-larval development test

  210. Methods for the Examination of Waters and Associated Materials 2007

    The direct toxicity assessment of aqueous environmental samples using the marine copepod Tisbe battagliai lethality test

  211. Methods for the Examination of Waters and Associated Materials 2007

    The Microbiology of Drinking Water Part 13 – The isolation and enumeration of aerobic spore-forming bacteria by membrane filtration

  212. Methods for the Examination of Waters and Associated Materials 2007

    The Microbiology of Drinking Water Part 7 – Methods for the enumeration of heterotrophic bacteria

  213. Methods for the Examination of Waters and Associated Materials 2007

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  214. Methods for the Examination of Waters and Associated Materials 2007

    The determination of cyanide in waters and associated materials

  215. Methods for the Examination of Waters and Associated Materials 2007

    The determination of chemical oxygen demand in waters and effluents

  216. Methods for the Examination of Waters and Associated Materials 2007

    An inter-laboratory trial on chemical oxygen demand determinations

  217. Methods for the Examination of Waters and Associated Materials 2007

    Index of Methods for Examination of Waters and Associated Materials 1976-2008

  218. Methods for the Examination of Waters and Associated Materials 2008

    Chemical disinfecting agents in waters and effluents

  219. Methods for the Examination of Waters and Associated Materials 2008

    The direct toxicity assessment of aqueous environmental samples using the Pseudokirchnereilla subcapitata freshwater algal growth inhibition test

  220. Methods for the Examination of Waters and Associated Materials 2008

    The determination of steroid oestrogens in waters using chromatography and mass spectrometry

  221. Methods for the Examination of Waters and Associated Materials 2009

    The direct toxicity assessment of aqueous environmental samples using the Skeletonema costatum marine algal growth inhibition test

  222. Methods for the Examination of Waters and Associated Materials 2009

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  223. Methods for the Examination of Waters and Associated Materials 2009

    The Microbiology of Drinking Water Part 4 – Methods for the isolation and enumeration of coliform bacteria and Escherichia coli (including E. coli O157:H7)

  224. Methods for the Examination of Waters and Associated Materials 2009

    The Microbiology of Drinking Water Part 14 – Methods for the isolation, identification and enumeration of Cryptosporidium oocysts and Giardia cysts

  225. Methods for the Examination of Waters and Associated Materials 2009

    The direct toxicity assessment of aqueous environmental samples using the Skeletonema costatum marine algal growth inhibition test

  226. Methods for the Examination of Waters and Associated Materials 2009

    The determination of metaldehyde in waters using chromatography with mass spectrometric detection

  227. Methods for the Examination of Waters and Associated Materials 2009

    The determination of acrylamide in waters using chromatography with mass spectrometric detection

  228. Methods for the Examination of Waters and Associated Materials 2010

    The determination of easily liberated sulphide in soils and similar matrices

  229. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 5 – The isolation and enumeration of enterococci by membrane filtration

  230. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  231. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 8 – The isolation and enumeration of Aeromonas and Pseudomonas aeruginosa by membrane filtration

  232. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 2 – Practices and procedures for sampling

  233. Methods for the Examination of Waters and Associated Materials 2010

    The determination of taste and odour in drinking waters

  234. Methods for the Examination of Waters and Associated Materials 2010

    The Microbiology of Drinking Water Part 14 – Methods for the isolation, identification and enumeration of Cryptosporidium oocysts and Giardia cysts

  235. Methods for the Examination of Waters and Associated Materials 2011

    The determination of cyanide and thiocyanate in soils and similar matrices

  236. Methods for the Examination of Waters and Associated Materials 2010

    Index of Methods for the Examination
    of Waters and Associated Materials 1976 – 2011

  237. Methods for the Examination of Waters and Associated Materials 2012

    The Microbiology of Drinking Water Part 7 – Methods for the enumeration of heterotrophic bacteria

  238. Methods for the Examination of Waters and Associated Materials 2012

    The Microbiology of Drinking Water Part 5 – Methods for the Isolation and enumeration of enterococci

  239. Methods for the Examination of Waters and Associated Materials 1987

    Methods for the Determination of the Metals Aluminium, Cadmium, Chromium, Cobalt, Copper, Iron, Lead, Manganese, Nickel, ranium, Vanadium and Zinc in Marine, Estuarine and Other Waters by Stripping Voltammetry or Concentration and Atomic Absorption Spectrophotometry

  240. Methods for the Examination of Waters and Associated Materials 2015

    The Microbiology of Recreational and Environmental Waters Part 1 – Water quality, epidemiology and public health

  241. Methods for the Examination of Waters and Associated Materials YYYY

    The Microbiology of Recreational and Environmental Waters Part 2 – Practices and procedures for sampling (Not in Library)

  242. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 3 – Methods for the isolation and enumeration of Escherichia coli (including E. coli O157:H7)

  243. Methods for the Examination of Waters and Associated Materials 2015

    The Microbiology of Recreational and Environmental Waters Part 4 – Methods for the isolation and enumeration of enterococci

  244. Methods for the Examination of Waters and Associated Materials 2015

    The Microbiology of Recreational and Environmental Waters Part 5 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens

  245. Methods for the Examination of Waters and Associated Materials 2015

    The Microbiology of Recreational and Environmental Waters Part 6 – Methods for the isolation and enumeration of Staphylococcus aureus

  246. Methods for the Examination of Waters and Associated Materials 2015

    The Microbiology of Recreational and Environmental Waters Part 7 – Methods for the isolation and enumeration of Aeromonas and Pseudomonas aeruginosa

  247. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 8 – Methods for the isolation and enumeration of Salmonella and Shigella

  248. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 9 – Methods for the isolation of Yersinia, Vibrio and Campylobacter by selective enrichment

  249. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 10 – A method for the isolation and enumeration of sorbitol-fermenting bifidobacteria by membrane filtration

  250. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 11 – Methods for the isolation and enumeration of somatic and F-specific bacteriophages and bacteriophages infecting Bacteroides fragilis

  251. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 12 – Methods for the concentration of enteric viruses and the detection and enumeration of enteroviruses by suspended cell assay

  252. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Recreational and Environmental Waters Part 13 – Methods for the isolation and enumeration of microbial tracers

  253. Methods for the Examination of Waters and Associated Materials 2014

    The determination of N-nitrosodimethylamine in drinking waters

  254. Methods for the Examination of Waters and Associated Materials 2016

    The Determination of Phenoxy Acid Herbicides and Related Pesticides in Raw and Potable Waters by Liquid Chromatography

  255. Methods for the Examination of Waters and Associated Materials 2015

    The preparation and pre-treatment of potentially contaminated soils and associated materials

  256. Methods for the Examination of Waters and Associated Materials 2017

    The Quantification of Asbestos in Soil (Withdrawn

  257. Methods for the Examination of Waters and Associated Materials 2017

    The Microbiology of Water and Associated Materials – Practices and Procedures for Laboratories

  258. Methods for the Examination of Waters and Associated Materials 2014

    The Determination of Taste and Odour in Drinking Water

  259. Methods for the Examination of Waters and Associated Materials 2017

    The Determination of Colour and Turbidity in Raw and Drinking Waters

  260. Methods for the Examination of Waters and Associated Materials 2018

    Estimation of Uncertainty of Measurement for Chemical and Physico-chemical Determinands in Drinking Water (Superseded)
    Estimation of Uncertainty of Measurement (Determinands Table (Superseded)
    Estimation of Uncertainty of Measurement (Calculations) (Superseded)

  261. Methods for the Examination of Waters and Associated Materials 2018

    The Stability and Preservation of Drinking, Ground and Surface Water Samples
    The Stability and Preservation of Drinking, Ground and Surface Water Samples (Table)

  262. Methods for the Examination of Waters and Associated Materials 2018

    The Determination of metals in Raw and Drinking waters by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

  263. Methods for the Examination of Waters and Associated Materials 2018

    The Determination of Metals in Raw and Potable waters by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)

  264. Methods for the Examination of Waters and Associated Materials 2017

    The Determination of Selected Taste and Odour Causing Contaminants in Drinking Waters by Gas Chromatography Mass Spectrometry

  265. Methods for the Examination of Waters and Associated Materials 2019

    The Identification of Volatile Organic Compounds in Raw and Potable Waters by Gas Chromatography-Mass Spectrometry

  266. Methods for the Examination of Waters and Associated Materials 2019

    The determination of Legionella bacteria in waters and other environmental samples Part 3 – Method for their detection and quantification by polymerase chain reaction (qPCR) and protocol for method validation

  267. Methods for the Examination of Waters and Associated Materials 2019

    The determination of Legionella bacteria in waters and other environmental samples Part 2 – Culture Methods for their detection and enumeration

  268. Methods for the Examination of Waters and Associated Materials 2020

    The Microbiology of Drinking Water Part 7 – Methods for the enumeration of heterotrophic bacteria

  269. Methods for the Examination of Waters and Associated Materials 2020

    The determination of Legionella bacteria in waters and other environmental samples Part 2 – Culture Methods for their detection and enumeration

  270. Methods for the Examination of Waters and Associated Materials 2020

    The Identification of Microorganisms using MALDI-TOF Mass Spectrometry

  271. Methods for the Examination of Waters and Associated Materials 2020

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  272. Methods for the Examination of Waters and Associated Materials 2020

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  273. Methods for the Examination of Waters and Associated Materials 2021

    The Determination of Haloacetic Acids in Raw and Potable Waters

  274. Methods for the Examination of Waters and Associated Materials 2021

    The Identification of Unknown Semi Volatile Organic Compounds in Raw and Potable Waters by GCMS

  275. Methods for the Examination of Waters and Associated Materials 2021

    The Microbiology of Drinking Water Part 6 – Methods for the isolation and enumeration of sulphite-reducing clostridia and Clostridium perfringens by membrane filtration

  276. Methods for the Examination of Waters and Associated Materials 2021

    Estimation of Uncertainty of Measurement for Chemical and Physico-chemical Determinands in Drinking Water (Superseded)
    Estimation of Uncertainty of Measurement (Determinands Table) (Superseded)
    Estimation of Uncertainty of Measurement (Calculations)(Superseded)

  277. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Drinking Water Part 4 – Methods for the Isolation and enumeration of coliform bacteria and Escherichia coli (including E. coli O157 H7)

  278. Methods for the Examination of Waters and Associated Materials 2016

    The Microbiology of Drinking Water Part 8 – Methods for the Isolation and enumeration of Aeromonas and Pseudomonas aeruginosa

  279. Methods for the Examination of Waters and Associated Materials 2000

    The Microbiology of Recreational and Environmental Waters

  280. Methods for the Examination of Waters and Associated Materials 2022

    The Determination of Microcystins in Raw and Potable Waters

  281. Methods for the Examination of Waters and Associated Materials 2023

    Bacteriological Swabs

  282. Methods for the Examination of Waters and Associated Materials 2023

    Estimation of Uncertainty of Measurement for Chemical and Physico-chemical Determinands in Drinking Water

    Estimation of Uncertainty of Measurement (Determinands Table)

    Estimation of Uncertainty of Measurement (Calculations Table)

  283. Methods for the Examination of Waters and Associated Materials 2024

    The Determination of Gross Alpha and Beta Radiation in Potable and Raw Waters by Rapid Screening Measurement with Gas Proportional Counting Detection

  284. Biology of Water and Associated Materials Series 2024

    Enumeration and Identification of Algae

  285. Methods for the Examination of Waters and Associated Materials 2024

    Target and Suspect Screening of Polar Organic Compounds in Raw and Potable Waters by Liquid Chromatography – High Resolution Accurate Mass Spectrometry

  286. Methods for the Examination of Waters and Associated Materials 2024

    The Microbiology of Sewage Sludge (2024) – Part 3 – Methods for the isolation and enumeration of Escherichia coli (including E. coli O157:H7)