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Related Experiment Videos

Determination of alkaline phosphatase in casein: collaborative study.

G K Murthy, J T Peeler, E E Bone

    Journal - Association of Official Analytical Chemists
    |May 1, 1981
    PubMed
    Summary

    Magnesium acetate significantly boosted alkaline phosphatase activity in casein samples, improving test accuracy to 95%. This rapid colorimetric method is now official.

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    Area of Science:

    • Food chemistry
    • Analytical chemistry

    Background:

    • Alkaline phosphatase is an enzyme found in milk products.
    • Accurate detection of alkaline phosphatase is crucial for quality control in dairy processing.

    Purpose of the Study:

    • To evaluate a rapid colorimetric test for determining alkaline phosphatase activity in casein.
    • To assess the effect of magnesium acetate on enzyme activity and test accuracy.

    Main Methods:

    • A collaborative study involving 6-8 analysts.
    • Testing of 10 unknown casein samples with and without magnesium acetate.
    • Utilizing a rapid colorimetric assay for alkaline phosphatase detection.

    Main Results:

    • Magnesium acetate significantly enhanced alkaline phosphatase activity.

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  • The addition of magnesium acetate led to a 95% accuracy rate in sample analysis.
  • The colorimetric method demonstrated high reliability in the presence of magnesium acetate.

    • Conclusions:

    • The rapid colorimetric test, optimized with magnesium acetate, is a reliable method for quantifying alkaline phosphatase in casein.
    • The enhanced method offers improved accuracy and efficiency for dairy quality control.
    • The method has been officially adopted, signifying its validated performance.