ISO 3356:1975
Milk and dried milk, buttermilk and buttermilk powder, whey and whey powder; Determination of phosphatase activity (Reference method)
- Standard No.
- ISO 3356:1975
- Release Date
- 1975
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 3356:2009
- Latest
- ISO 3356:2009
- 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.
ISO 3356:1975 history
- 2009 ISO 3356:2009 Milk - Determination of alkaline phosphatase
- 1975 ISO 3356:1975 Milk and dried milk, buttermilk and buttermilk powder, whey and whey powder; Determination of phosphatase activity (Reference method)
