90.60 Close of review Dec 3, 2023
ISO
ISO/TC 147/SC 4 Microbiological methods
International Standard
07.100.20 Microbiology of water
Published
The procedure is applicable to all types of water, except when a large amount of particulate material is liable to be retained by the membrane. The principle covers several steps from selection by applying heat to destroy vegetative bacteria to filtration of the water sample through a membrane filter having a suitable pore size (0,2 µm) to retain the spores in or on it. The filter is placed on a selective culture medium, followed by incubation and counting of black colonies.
PUBLISHED
ISO 6461-2:1986
90.60
Close of review
Dec 3, 2023
ABANDON
ISO/CD 6461-2