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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)

Jul 1, 1975
95.99   Withdrawal of Standard   Mar 2, 2009

General information

95.99     Mar 2, 2009

ISO

ISO/TC 34/SC 5

International Standard

67.100.10  

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Scope

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.

Life cycle

NOW

WITHDRAWN
ISO 3356:1975
95.99 Withdrawal of Standard
Mar 2, 2009

REVISED BY

ABANDON
ISO/WD 3356

PUBLISHED
ISO 3356:2009