ISO 9308-1 FREE PDF

The method is based on membrane filtration, subsequent culture on a chromogenic coliform agar medium, and calculation of the number of target organisms in the sample. Due to the low selectivity of the differential agar medium, background growth can interfere with the reliable enumeration of E. This method is not suitable for these types of water. This standard is especially suitable for waters with low bacterial numbers that will cause less than total colonies on chromogenic coliform agar. These may be drinking water, disinfected pool water, or finished water from drinking water treatment plants.

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The method is based on membrane filtration, subsequent culture on a chromogenic coliform agar medium, and calculation of the number of target organisms in the sample. Due to the low selectivity of the differential agar medium, background growth can interfere with the reliable enumeration of E. This method is not suitable for these types of water.

This standard is especially suitable for waters with low bacterial numbers that will cause less than total colonies on chromogenic coliform agar. These may be drinking water, disinfected pool water, or finished water from drinking water treatment plants. Some strains of E. The presence and extent of faecal pollution is an important factor in assessing the quality of water and the risk to human health from infection.

Examination of water samples for the presence of Escherichia coli E. Examination for coliform bacteria can be more difficult to interpret because some coliform bacteria live in soil and surface fresh water and are not always intestinal. Therefore, the presence of coliform bacteria, although not a proof of faecal contamination, may indicate failure in treatment, storage, or distribution.

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ISO 9308-1:2014

Differentiating chromogenic agar for the detection and bacterial count of E. Ltd Room No. Withoutabox Submit to Film Festivals. Amazon Advertising Find, attract, and engage customers.

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ISO 9308 2014.pdf

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