The Quantification of Asbestos in Soil (2017) (Blue Book No. 256) has been withdrawn from publication because it was the view of the Standing Committee of Analysts that it was no longer fit for purpose.
Thank you to Everyone who contributed to the 2020 revision of our blue book for the determination of Legionella bacteria in water samples by culture method. Download here!
The Microbiology of Drinking Water – Part 7 – Methods for the enumeration of heterotrophic bacteria (2020) was revised to include a validated extension to the 20 minute time limit for adding agar to the sample. Download here!