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ISO 9998:1991 Water quality -- Practices for evaluating and controlling microbiological colony count media used in water quality tests
standard by International Organization for Standardization, 11/01/1991
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Full Description
Describes a method used for the comparison and evaluation of the same medium prepared from different lots of materials, and deals with the comparison and evaluation of different media which are used for the same purpose. Annexes A and B form an integral part of this Standard.