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Normas DIN – AENOR
DIN EN ISO 9308-1:2017-09

DIN EN ISO 9308-1:2017-09

Water quality - Enumeration of Escherichia coli and coliform bacteria - Part 1: Membrane filtration method for waters with low bacterial background flora (ISO 9308-1:2014 + Amd 1:2016); German version EN ISO 9308-1:2014 + A1:2017

Qualité de l'eau - Dénombrement des Escherichia coli et des bactéries coliformes - Partie 1: Méthode par filtration sur membrane pour les eaux à faible teneur en bactéries (ISO 9308-1:2014 + Amd 1:2016); Version allemande EN ISO 9308-1:2014 + A1:2017

Wasserbeschaffenheit - Zählung von Escherichia coli und coliformen Bakterien - Teil 1: Membranfiltrationsverfahren für Wässer mit niedriger Begleitflora (ISO 9308-1:2014 + Amd 1:2016); Deutsche Fassung EN ISO 9308-1:2014 + A1:2017

Fecha:
2017-09 /Active
Equivalencias internacionales:

EN ISO 9308-1 (2014-09)

EN ISO 9308-1/A1 (2017-01)

ISO 9308-1 AMD 1 (2016-12)

ISO 9308-1 (2014-09)

Relación con otras normas DIN:
Resumen:
This standard specifies a method for the detection and enumeration of E. coli and coliform bacteria in water for human consumption. The method is based on membrane filtration, subsequent culture on a differential 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 coliform bacteria and E. coli, for example in surface waters or shallow well waters. This method is not suitable for these types of water. This part of ISO 9308 is especially suitable for drinking water, disinfected pool water and other waters with low bacterial numbers. Strains of Escherichia coli which are ß-glucuronidase negative, such as Escherichia coli O157, will not be detected, according to this standard.
Keywords:
Agar, Analysis, Bacteria, Bacteria count methods, Bacteriocide-activity determination, Bacteriological quality, Coliform bacteria, Counting, Definitions, Determination, Determination of content, Drinking water, Escherichia coli, Filtration, Filtration method, Membrane filtration, Microbiological analysis, Microorganisms, Potable water, Quality, Quality assurance, Reference methods, Standard methods, Swimming pool water, Testing, Verification, Water, Water pollution, Water practice, Water quality, Water testing, Water treatment plants
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