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ISO 26323 | IDF 213: 2009: Milk products - Determination of the acidification activity of dairy cultures by continuous pH measurement (CpH)

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Document info

pages 13
published date 24 March 2009
reference ISO 26323, IDF 213:2009

Publication description

This standard specifies a method for the measurement of the acidification activity of lactic acid bacteria by continuous measurement of pH.

The method is applicable to dairy starter cultures where these characteristic microorganisms are present.

Two types of standardized milk are specified in the procedure: boiled milk with 9,5 % mass fraction dry matter (B-milk 9,5); and autoclaved milk with 9,5 % mass fraction dry matter (A-milk 9,5). It is possible that heat treatment of B-milk 9,5 does not inactivate all enzymes that are present, which can affect the activity of some cultures. In that case, cultures are tested with A-milk 9,5 in which all enzymes have been inactivated.

Standard only available in English.

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