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Chemically integrating dosimeter and gas analysis methods

  • US 4,267,023 A
  • Filed: 11/21/1979
  • Issued: 05/12/1981
  • Est. Priority Date: 10/17/1977
  • Status: Expired due to Term
First Claim
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1. Method for detecting hydrogen sulfide gas by chemical integration comprising the steps of:

  • providing a gas permeable, liquid impermeable outer membrane in conjunction with a liquid impermeable microporous hydrophobic inner membrane, the latter with a gas permeation rate substantially greater than that of the outer membrane;

    placing an internal electrolyte solution containing silver ions in contact with the inner membrane;

    allowing hydrogen sulfide gas to diffuse through the outer membrane, through the inner membrane, and into the internal electrolyte where the outer membrane is a gas permeation rate controlling membrane, and the inner membrane is a protective membrane;

    reacting the internal electrolyte with hydrogen sulfide gas to completely absorb said gas and to alter the composition of the internal electrolyte; and

    measuring the change in the concentration of silver ions in the electrolyte due to the entry of hydrogen sulfide gas into the internal electrolyte, whereby the concentration of the gas is determined.

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