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EVS-EN ISO 9308-1:2002

Water quality - Detection and enumeration of Escherichia coli and coliform bacteria - Part 1: Membrane filtration method

Üldinfo
Kehtetu alates 07.11.2014
Alusdokumendid
ISO 9308-1:2000; EN ISO 9308-1:2000
Tegevusala (ICS grupid)
07.100.20 Vee mikrobioloogia
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Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
07.11.2014
Põhitekst
07.11.2008
Parandus
04.02.2002
Põhitekst
This International Standard describes a reference method (Standard Test) for the detection and enumeration of E. coli and coliform bacteria in water for human consumptiom. The Standard Test is based on membrane filtration, subsequent culture on a different agar medium and calculation of the number of target organisms in the sample. The Standard Test has a low selectivity, allowing detection of injured bacteria. Due to the low selectivity, background growth can interfere with the reliable enumeration of coliform bacteria and E.coli, for example in some drinking waters, like shallow well waters, that have not been disinfected and yield a high background growth. It is therefore especially suitable for disinfected water and other drinking waters of low bacterial numbers. The standard includes a rapid method (Rapid Test) for the detection of E.coli only within 24 h, which  can be useful in special cases, when quick information is needed. The Rapid Test is based on membrane filtration, subsequent culture under selective conditions and calculation of the number of E.coli in the sample.
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