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Related Experiment Videos

Air sampling and analytical procedures for benzidine, 3,3'-dichlorobenzidine and their salts.

R Morales, S M Rappaport, R E Hermes

    American Industrial Hygiene Association Journal
    |November 1, 1979
    PubMed
    Summary

    New methods were developed for sampling and analyzing benzidine and 3,3'-dichlorobenzidine in the air. These procedures offer reliable detection for personal monitoring, ensuring accurate environmental and occupational exposure assessments.

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    Area of Science:

    • Environmental Chemistry
    • Analytical Chemistry
    • Occupational Health

    Background:

    • Benzidine and 3,3 -dichlorobenzidine are significant environmental and occupational contaminants.
    • Accurate air monitoring is crucial for assessing exposure risks.
    • Existing sampling and analytical methods may have limitations.

    Purpose of the Study:

    • To develop novel air-sampling and analytical procedures.
    • To detect benzidine, 3,3 -dichlorobenzidine, and their salts.
    • To establish sensitive and reliable monitoring techniques.

    Main Methods:

    • Air sampling using a glass-fiber filter followed by a silica gel bed.
    • Extraction of collected compounds from the sampler.
    • High-Performance Liquid Chromatography (HPLC) analysis.

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  • Laboratory evaluation with test aerosol atmospheres.

    • Main Results:

    • Achieved sensitivities in the range of 3 micrograms/m3 for 48-L air samples.
    • Methods demonstrated independence from environmental temperature and humidity.
    • Precision, sample stability, and separation from interferants were validated.

    Conclusions:

    • The developed methods provide reliable results for personal air monitoring.
    • These procedures enhance the ability to assess exposure to benzidine and its derivatives.
    • The study contributes to improved occupational and environmental health surveillance.