Process for the preparation of highly accurate and stable electrode containing a silver salt
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United States of America Patent
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-
Dec 1, 1981
Issued Date -
N/A
app pub date -
Oct 31, 1979
filing date -
Mar 31, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a new process for the preparation of highly accurate and stable silver-silver salt reference electrode. According to the invention a homogeneous mixture is formed from silver powder and a powdered silver salt, then a paste is prepared by blending the mixture with a liquid binding agent capable of adhering to metals, applying the paste onto the surface of an electrode base, allowing the paste to harden and then subjecting the electrode to a heat treatment between 100.degree. C. and 250.degree. C. In this latter step a porous silver-silver salt layer is formed on the metal base, which renders the electrode highly accurate and stable. Ion selective measuring electrodes are prepared essentially in the same manner with the difference that silver is replaced partly or entirely by graphit.
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