NEN 6557 : 1981
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
BACTERIOLOGICAL EXAMINATION OF DRINKING WATER - EXAMINATION BY MEANS OF FERMENTATION TESTS FOR THE PRESENCE OF COLIFORM BACTERIA AND THERMOTOLERANT COLIFORM BACTERIA
01-09-2011
12-01-2013
Demonstrates coliform bacteria and thermotolerant coliform bacteria by growing these germs in a selective liquid medium and confirming positive accumulation cultures. Applies to the bacteriological examination of drinking water.
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