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Diffusive samplers using longitudinal sorbent strips.

D L Bartley

    American Industrial Hygiene Association Journal
    |September 1, 1986
    PubMed
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    This study analyzes longitudinal strip diffusive samplers, providing a theoretical framework to calculate exposure based on sampled mass. It refines calculations for samplers with semipermeable membranes, improving air monitoring accuracy.

    Area of Science:

    • Environmental Science
    • Analytical Chemistry
    • Industrial Hygiene

    Background:

    • Diffusive samplers are widely used for air monitoring.
    • Accurate quantification of airborne analytes is crucial for exposure assessment.
    • Theoretical models are needed to understand and optimize sampler performance.

    Purpose of the Study:

    • To develop a theoretical analysis of longitudinal strip diffusive samplers.
    • To derive a relationship between air concentration (exposure) and sampled analyte mass.
    • To investigate sampler modifications, including semipermeable membranes and sampler lag.

    Main Methods:

    • Analytical calculations based on varying effective sampling length.
    • Development of modified relationships for specific sampler geometries.

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  • Modeling of concentration distribution and analyte streamlines.

    • Main Results:

    • A derived relationship connects exposure to sampled analyte mass for general sampler geometries.
    • Modifications were developed for samplers with semipermeable entrance membranes.
    • Detailed concentration distributions and streamlines were determined for an idealized sampler.

    Conclusions:

    • The theoretical framework provides a basis for understanding diffusive sampler performance.
    • The derived relationships enhance the accuracy of exposure assessment using these samplers.
    • This work contributes to the optimization of air sampling techniques.