pH Measurement device
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United States of America Patent
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-
Apr 1, 1986
Grant Date -
N/A
app pub date -
Jun 26, 1985
filing date -
Jun 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pH measurement device includes working and reference electrodes. The working electrode has a linear electrically conductive substrate, at least a distal end surface of which consists of platinum, and a selective hydrogen ion permeable layer formed on the distal end face of the substrate. The reference electrode includes an electric conductor formed to be insulated from the working electrode and surrounding the working electrode, a polymer-silver (I) complex layer formed on the outer circumferential surface of the conductor, and an ion-conductive layer containing an anionic compound and formed on the complex layer. The pH of a solution is measured in accordance with a difference between a potential of the working electrode and that of the reference electrode.
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