STP989

    Decontamination of Chemical Protective Clothing Exhibiting Matrix Release

    Published: Jan 1988


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    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


    Author Information:

    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


    Paper ID: STP26302S

    Committee/Subcommittee: F23.96

    DOI: 10.1520/STP26302S


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