STP989: Decontamination of Chemical Protective Clothing Exhibiting Matrix Release

    Berardinelli, SP
    Industrial hygiene chemist and engineering technician, National Institute for Occupational Safety and Health, Division of Safety Research, Injury Prevention Research Branch, Protective Equipment Section, Morgantown, WV

    Hall, R
    Industrial hygiene chemist and engineering technician, National Institute for Occupational Safety and Health, Division of Safety Research, Injury Prevention Research Branch, Protective Equipment Section, Morgantown, WV

    Pages: 9    Published: Jan 1988


    Abstract

    This study was conducted to evaluate decontamination methods for a glove material/liquid chemical combination that, together, demonstrated matrix release. A glove material/liquid chemical combination was assumed to exhibit matrix release if the following two conditions were met: (1) the glove material, which was exposed to the challenge liquid chemical until equilibrium saturation was attained, slowly released the entrapped challenge chemical for at least 72 h after exposure; and (2) upon re-exposure to the challenge chemical, the glove material demonstrated a significantly different breakthrough time. A neoprene/n-butyl acetate (glove/liquid chemical) combination, meeting these conditions, was investigated in detail. Neoprene/p-xylene and nitrile/n-butyl acetate combinations were reviewed, but did not exhibit matrix release.

    Three decontamination methods were tested: (1) air drying at 25°C, (2) 15-min manual detergent wash, and (3) elevated temperature washing-drying. For the neoprene/n-butyl acetate combination, both air drying and a single 15-min manual detergent wash were ineffective in cleaning the saturated matrix. Breakthrough time changes and measurement of the concentration of n-butyl acetate in the material demonstrated that the matrix was still saturated. However, elevated temperature washing and drying (45°C wash and 95°C drying) did remove the residual n-butyl acetate from the neoprene.

    Keywords:

    decontamination, protective clothing, chemical protective clothing, matrix release, chemical permeators


    Paper ID: STP26302S

    Committee/Subcommittee: F23.96

    DOI: 10.1520/STP26302S


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