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Sodium ion selective electrode and method of use

  • US 4,708,776 A
  • Filed: 07/28/1986
  • Issued: 11/24/1987
  • Est. Priority Date: 07/28/1986
  • Status: Expired due to Term
First Claim
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1. A dry-operative sodium ion-selective electrode comprising:

  • (a) a dried reference electrode in contact with(b) a dried reference layer buffered to a pH of from about 4 to about 8 with a water-soluble, organic dicarboxylic acid or salt thereof, which layer is in contact with one side of(c) an ion-selective membrane composition comprising an ionophore for sodium ions, a compound capable of solvating said ionophore and a supporting matrix composed of a binder material.

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