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Using immersion test data to screen chemical protective clothing.

J F Stampfer1, R J Beckman, S P Berardinelli

  • 1Los Alamos National Laboratory, NM 87545.

American Industrial Hygiene Association Journal
|November 1, 1988
PubMed
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This study introduces a chemical protective material screening test using weight and volume changes. The method accurately predicts breakthrough times and permeation rates, aiding material selection for protective gear.

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Protective Equipment Testing

Background:

  • Selecting effective chemical protective materials is crucial for safety.
  • Existing testing methods can be time-consuming.
  • A need exists for efficient screening methods.

Purpose of the Study:

  • To develop and evaluate a screening test for chemical protective materials.
  • To predict breakthrough times and permeation rates using material property changes.
  • To identify potential candidates for further, more rigorous testing.

Main Methods:

  • Materials were immersed in challenge chemicals, and weight and volume changes were measured.
  • Simple regression analysis was used to predict breakthrough times based on weight change and thickness.

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  • Discriminant analysis was employed to classify breakthrough times and permeation rates.

    • Main Results:

    • Regression analysis predicted short breakthrough times with 90% confidence.
    • Discriminant analysis showed high accuracy in classifying breakthrough times (>4 or 8 hr) and permeation rates (<90 or 400 mg/m2-min).
    • Prediction errors were low, with actual breakthrough times being underestimated in 6% or less of cases.

    Conclusions:

    • The developed screening test effectively predicts chemical protective material performance.
    • Weight and volume change measurements, analyzed via discriminant analysis, are reliable indicators.
    • This method facilitates efficient selection of materials for advanced testing.