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ISO 3356:1975

Milk and dried milk, buttermilk and buttermilk powder, whey and whey powder — Determination of phosphatase activity (Reference method)

Standard Details

Can be applied for the control of proper pasteurization of the products specified in the title of this standard. Uses a principle of determination based on the dilution of the liquid product or the reconstituted liquid product with a buffer at pH 10.6 containing disodium phenylphosphate and incubation at 37 degrees centigrade for 1 h. By reaction with the alkaline phosphatase present in the product phenol is liberated which reacts with dibromopquinonechloroimide. Then the colour formed is measured photometrically.

General Information

Status : WITHDRAWN
Standard Type: Main
Document No: ISO 3356:1975
Document Year: 1975
Pages: 3
Edition: 1
  • ICS:
  • 67.100.10 Milk and processed milk products

Life Cycle

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WITHDRAWN
ISO 3356:1975
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