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Extraction of light filth from coconut: collaborative study.

J J Thrasher

    Journal - Association of Official Analytical Chemists
    |July 1, 1978
    PubMed
    Summary

    This study improved the official method for detecting filth in coconut products. Modifications enhance rodent hair and insect fragment recovery, providing cleaner filter papers for accurate analysis.

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    Area of Science:

    • Food safety analysis
    • Analytical chemistry
    • Microscopy

    Background:

    • The current official method (44.029) for coconut filth analysis has limitations.
    • Excessive plant debris and low hair recovery rates are common issues.
    • Improved methods are needed for accurate contaminant detection.

    Purpose of the Study:

    • To enhance the official method for determining filth in coconut.
    • To improve filter paper cleanliness and recovery rates of rodent hairs and insect fragments.
    • To develop a more reliable and efficient analytical procedure.

    Main Methods:

    • Modified the defatting step using sodium lauryl sulfate and borax.
    • Substituted 40% isopropanol for 60% ethanol in the aqueous phase.
    • Replaced n-heptane with mineral oil for improved hair recovery.

    Main Results:

    • Achieved higher and more reproducible recoveries of rodent hairs and insect fragments.
    • Produced significantly cleaner filter papers.
    • The modified method demonstrated superior performance compared to the previous official method.

    Conclusions:

    • The revised method effectively addresses the deficiencies of the previous official procedure.
    • The enhanced method provides more accurate and reliable results for filth analysis in coconut.
    • The improved method has been officially adopted as a replacement for method 44.029.

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