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Related Experiment Videos

Solid sorbent sampler for white phosphorus in air

H K Dillon, W J Barrett, P M Eller

    American Industrial Hygiene Association Journal
    |August 1, 1978
    PubMed
    Summary
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    This study presents a method for collecting and analyzing white phosphorus vapor using Tenax-GC sorbent tubes and gas chromatography. The validated technique accurately measures airborne phosphorus concentrations, ensuring workplace safety.

    Area of Science:

    • Environmental Chemistry
    • Occupational Health and Safety
    • Analytical Chemistry

    Background:

    • White phosphorus is a toxic industrial chemical requiring accurate air monitoring.
    • Existing methods for phosphorus vapor detection may have limitations in sensitivity or specificity.
    • Occupational exposure limits necessitate reliable sampling and analysis techniques.

    Purpose of the Study:

    • To develop and validate a method for sampling and quantifying white phosphorus vapor in ambient air.
    • To assess the performance and reliability of the proposed analytical method under various conditions.
    • To ensure the method is suitable for occupational exposure monitoring.

    Main Methods:

    • Air samples were collected using personal sampling pumps with Tenax-GC packed sorbent tubes.

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  • Phosphorus was extracted from the sorbent using xylene.
  • Quantification was performed using gas chromatographic analysis.
  • Method validation included assessing sorbent capacity and potential interferences.

    • Main Results:

    • The Tenax-GC sorbent demonstrated a capacity of 10-20 µg P4/100 mg sorbent.
    • The method allows for up to 4 hours of sampling at the OSHA standard of 0.1 mg/m³.
    • Significant interferences from red phosphorus, phosphine, water vapor, and common gases were not observed.
    • The impact of environmental and chromatographic variables was systematically evaluated.

    Conclusions:

    • The developed method provides a reliable and sensitive means for monitoring white phosphorus vapor in workplace air.
    • The technique is robust and unaffected by common environmental factors and potential contaminants.
    • This method supports effective occupational health and safety protocols for handling white phosphorus.