This Technical Specification specifies a screening method for the detection of the phosphatase activity in cow's milk and dried milk, buttermilk and buttermilk powder, and whey and whey powder. Two alternative procedures (A and B) are given. Procedure A is the simpler as it does not include a clarification treatment and is especially suited for milk. Procedure B includes a clarification step which allows a more sensitive detection through which better quantitative results can be obtained, if desired. If either method is used for checking the proper pasteurization of these products or their raw materials, then further tests are necessary to ensure that the phosphatase activity is not due to either heat-stable microbial phosphatase (see 9.3.1) or reactivated phosphatase (see 9.3.2). NOTE A method using a patented proprietary reagent is described in Annex A.
ISO/TS 6090-2004由国际标准化组织 IX-ISO 发布于 2004-03。
ISO/TS 6090-2004 在中国标准分类中归属于: X16 乳与乳制品,在国际标准分类中归属于: 67.100.01 奶和奶制品综合,67.100.10 奶及加工奶产品。
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