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An improved Aschaffenburg and Mullen alkaline phosphate test for coloured milk products

Authors: W. Seng Kwee

Abstract:

This paper highlights the problem of obtaining accurate quantitative phosphatise test results for a number of milk products when using APTW 7 Lovibond phosphatise discs in the Aschaffenburg and Mullen phosphatise test. It introduces an extraction / spectrophotometric step to the test so that it can be applied successfully to the analysis of coloured milk products. The method can also be used for other milk products such as cream and skim milks for which the original method does not give a linear relationship between phosphatase activity and measured colour.

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