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Method of manufacturing ion-selective electrodes for analyzing selected ions in solution

  • US 4,867,860 A
  • Filed: 12/16/1986
  • Issued: 09/19/1989
  • Est. Priority Date: 12/23/1985
  • Status: Expired due to Fees
First Claim
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1. A method for producing a laminar electrode for determining selected ion concentration in aqueous media, having an ion-selective diaphragm, an electrochemical half-cell with a stable internal reference potential and a metal conductive base layer, the method comprising:

  • (a) forming a laminate from the following in succession;

    (i) an insulating support, (ii) the conductive base layer, and (iii) the internal reference half-cell;

    (b) covering the laminate with a waterproof insulating mask having at least one aperture;

    (c) depositing in the aperture a layer of a solution comprising an organic solvent, an ionophore, a plasticizer and a binder;

    (d) solidifying the solution by evaporation thereby forming, the ion-selective diaphragm; and

    (e) providing a sealed-tight junction zone between the diaphragm and the mask by the solvent used to form the diaphragm being suitable as a solvent for the mask.

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