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Long-life membrane electrode for non-ionic species

  • US 4,813,424 A
  • Filed: 12/23/1987
  • Issued: 03/21/1989
  • Est. Priority Date: 12/23/1987
  • Status: Expired due to Fees
First Claim
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1. An improved membrane electrode for measuring the concentration of a non-ionic species in an essentially aqueous medium comprising:

  • an electrically conductive substrate;

    a first coating surrounding said substrate composed of a mixture of polymeric material, an anion exchange material, and a positively charged water-insoluble alkaline earth metal salt of said non-ionic species, anda hydrogel coating of material surrounding said first coating having a positive charge of sufficient potential to prevent leaching of the substantial amounts of the alkaline earth metal component of said salt.

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