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Related Experiment Videos

A small-volume constant-flow air sampling device for thermal desorption GC analysis

S Kanno1, M Sugimoto

  • 1National Institute of Industrial Health, Kawasaki, Japan.

Industrial Health
|January 1, 1995
PubMed
Summary

A novel glass syringe air sampler with disposable membrane filters provides constant airflow for 15 minutes. This device is effective for measuring organic solvent vapor concentrations in workplace environments.

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Occupational Health

Background:

  • Accurate air sampling is crucial for assessing workplace exposure to volatile organic compounds.
  • Existing air sampling methods may have limitations in terms of flow rate consistency and portability.
  • Development of simple, reliable devices for monitoring organic solvent vapor is needed.

Purpose of the Study:

  • To evaluate a glass syringe equipped with disposable membrane filters as a constant-flow air sampling device.
  • To determine the feasibility of this device for measuring organic solvent vapor concentrations in the parts per million (ppm) range.

Main Methods:

  • A 100 ml glass syringe was utilized with 0.50-micron pore size Teflon membrane filters as a flow restrictor.
  • The device was tested for flow rate constancy over a 15-minute sampling period.

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  • Gas chromatography with thermal desorption was employed for organic solvent vapor determination.

    • Main Results:

    • The air sampling device achieved a constant flow rate of 3 ml/min.
    • Using two to eight membrane filters ensured a stable flow rate for the entire sampling duration.
    • A sample volume under 50 ml was sufficient for detecting organic solvent vapors at ppm levels.

    Conclusions:

    • The glass syringe air sampler with disposable membrane filters is a viable tool for constant-flow air sampling.
    • This method is suitable for determining time-weighted average concentrations of organic solvent vapor in occupational settings.
    • The device offers a straightforward and effective approach for workplace air quality monitoring.