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Chemical test for mammalian feces: collaborative study

J J Thrasher, J S Gecan

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

    A new chemical test accurately detects mammalian feces in food using alkaline phosphatase activity. This method achieved 95% accuracy in identifying fecal samples, enhancing food safety protocols.

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    Area of Science:

    • Food safety analysis
    • Analytical chemistry methods
    • Enzyme-based detection systems

    Background:

    • Ensuring food safety requires reliable methods to detect contaminants.
    • Mammalian feces can introduce pathogens into food products.
    • Existing detection methods may lack specificity or efficiency.

    Purpose of the Study:

    • To develop and validate a chemical method for identifying mammalian feces in food.
    • To assess the efficacy of alkaline phosphatase as a marker for mammalian fecal contamination.
    • To provide a standardized, accurate test for food analysis.

    Main Methods:

    • A colorimetric assay was developed based on alkaline phosphatase activity.
    • The method involves enzymatic hydrolysis of phenolphthalein diphosphate.
    • Color development in a basic medium quantifies the enzyme's presence.

    Main Results:

    • The chemical method demonstrated high specificity for mammalian alkaline phosphatase.
    • A collaborative study involving 22 animal feces samples achieved 95% correct identification.
    • The assay provides a clear, colorimetric indication of fecal presence.

    Conclusions:

    • The developed chemical method offers a reliable and accurate means for detecting mammalian feces in food.
    • The method's adoption as official first action signifies its validated performance.
    • This assay contributes to improved food safety and quality control measures.

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