PH reference electrode

Details PH reference electrode PH reference electrode

1974-01-28

1976-06-01

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

324 30R, G01N 2756, G01N 2730

Patent

active

039606899

ABSTRACT:
A relatively constant concentration of the electrolytic salt bridge solution within a pH reference electrode is maintained by including crystals of the electrolyte salt in a concentrated but not saturated solution. In a preferred electrode, the electrolytic salt bridge is a concentrated KCl solution (e.g. about 4 M/l) within which KCl crystals are held in place by an inert foraminous material disposed intermediate an internal reference electrode and a passageway in the electrode housing through which is established electrochemical contact between the salt bridge and a fluid, the pH of which is to be measured.

REFERENCES:
patent: 2760922 (1956-08-01), Williams
patent: 3455793 (1969-07-01), Watanabe et al.
patent: 3676319 (1972-07-01), Kirsten

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