pH Measurement device

Details pH Measurement device pH Measurement device

1985-06-26

1986-04-01

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

128635, 204415, 204433, 324438, G01N 2730

Patent

active

045796416

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.

REFERENCES:
patent: 3709810 (1973-01-01), Grubb et al.
patent: 4338175 (1982-07-01), Binder et al.

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