Method of making an ion-selective electrode

Details Method of making an ion-selective electrode Method of making an ion-selective electrode

C - Chemistry, Metallurgy

30

B

18/14, 148/2.6

C30B 15/02 (2006.01) G01N 27/30 (2006.01) G01N 27/333 (2006.01)

Patent

CA 1058490

ABSTRACT OF THE DISCLOSURE A method of making an ion-selective membrane of an ion- selective electrode, comprising the steps of coating surfaces of granules of a silver halide selected from the group consisting of AgCl, AgBr or AgI with an Ag2S layer by chemical reaction in Na2S solution and compressing the resultant granules to form a membrane. Fine granules of silver halide are formed by dropping AgNO3 solution into the solution of a halide of K or Na which is agitated strongly, for example, by a stirrer. The character- istics of the electrode are improved by using the granules coated with an Ag2S layer prepared by dropping the Na2S solution into the solution containing granules of strongly agitated silver halide.

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