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pH electrode

  • US 5,354,449 A
  • Filed: 10/13/1992
  • Issued: 10/11/1994
  • Est. Priority Date: 01/10/1991
  • Status: Expired due to Term
First Claim
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1. A pH electrode comprising an internal reference electrode, a layer of internal reference material and a pH sensitive polymer-based membrane, characterized in that the membrane has a limited range of pH response, and in that the internal reference material has a pH outside the range of pH response of the membrane.

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