Process for producing the ion-sensitive probe electrode of a hea

Details Process for producing the ion-sensitive probe electrode of a hea Process for producing the ion-sensitive probe electrode of a hea

1992-05-20

1993-11-16

Beck, Shrive

Coating processes

Applying superposed diverse coating or coating a coated base

Metallic compound-containing coating

427125, 4271261, 427286, 204416, G05D 136, B05D 512

Patent

active

052622053

ABSTRACT:
A method of producing an ion sensitive working electrode for a heavy metal ion sensor, the ion sensitive working electrode including a mixture of Ag.sub.2 S and MeS in which Me represents a heavy metal to be determined in a solution to be measured, the method including applying a conductive layer onto a substrate using at least one thick-film technique selected from the group consisting essentially of screen printing and film casting; applying a layer comprised of a plurality of juxtaposed sections on top of the conductive layer, each section of the plurality of juxtaposed sections being comprised of a mixture of Ag.sub.2 S and MeS, with each section of the plurality of juxtaposed sections containing a different heavy metal, Me; and applying a covering layer on top of the layer comprised of a plurality of juxtaposed sections and on top of at least a portion of the conductive layer, which portion of the conductive layer will contact the solution to be measured in use whereby the covering layer protects the conductive layer from the solution to be measured in use, the covering layer having defined therein a plurality of window regions, one window region for each section of the plurality of juxtaposed sections, whereby the solution to be measured in use is provided access to the layer comprised of a plurality of juxtaposed sections.

REFERENCES:
patent: 3892833 (1975-07-01), Hattori et al.
patent: 4400243 (1983-08-01), Ebdon et al.

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