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Quantitative thin layer chromatographic multi-sulfonamide screening procedure.

M H Thomas, K E Soroka, S H Thomas

    Journal - Association of Official Analytical Chemists
    |July 1, 1983
    PubMed
    Summary
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    This study presents a fast method for detecting sulfonamide residues in animal tissues using optical scanning. The technique identifies multiple sulfonamides at low levels, aiding in food safety analysis.

    Area of Science:

    • Analytical Chemistry
    • Food Safety
    • Veterinary Science

    Background:

    • Sulfonamides are widely used veterinary drugs.
    • Accurate detection of sulfonamide residues is crucial for food safety and regulatory compliance.
    • Existing methods for sulfonamide detection can be time-consuming and require extensive sample preparation.

    Purpose of the Study:

    • To develop a rapid and sensitive method for determining multiple sulfonamide residues in animal tissues.
    • To establish an efficient analytical technique for food safety applications.

    Main Methods:

    • In-situ optical scanning of fluorescamine derivatives on thin-layer silica gel plates.
    • Sample preparation involving extraction with ethyl acetate, back-extraction into glycine buffer, and subsequent extraction into methylene chloride.

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  • Chromatographic separation using pre-adsorbent layer silica gel plates.

    • Main Results:

    • The method allows for the determination of sulfonamides at levels below 0.1 ppm.
    • Minimal sample preparation is required, making the process efficient.
    • The technique was successfully applied to detect residues of sulfamethazine, sulfadimethoxine, sulfathiazole, sulfaquinoxaline, and sulfabromomethazine.

    Conclusions:

    • This optical scanning method offers a rapid and sensitive approach for sulfonamide residue analysis in animal tissues.
    • The technique simplifies sample preparation, enhancing efficiency for routine testing.
    • It provides a valuable tool for ensuring the safety of meat and poultry products.