Long-life membrane electrode for non-ionic species
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United States of America Patent
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Mar 21, 1989
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N/A
app pub date -
Dec 23, 1987
filing date -
Dec 23, 1987
priority date (Note) -
Expired
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Abstract
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 water-insoluble alkaline earth metal salt of said non-ionic species, and a 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 eath metal component of said salt.
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