Ion selective electrode

Details Ion selective electrode Ion selective electrode

1978-10-11

1980-01-08

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2730

Patent

active

041826680

ABSTRACT:
An electrode sensitive to ions in solution comprises an outer tubular body having an opening at its one end, an inner tubular body secured to the other end of the outer tubular body and having an opening at its one end, a tip member threadingly engaged to one end of the outer tubular body and having an aperture at its one end, a first porous membrane provided between the tip member and one end of the outer tubular body to define a first reservoir together with the outer tubular body, a sealing member provided around the periphery of the first porous membrane, a second porous membrane provided at one end of the inner tubular body to define a second reservoir therein, an ion-exchanger liquid accommodated in the first reservoir and in contact with the first porous membrane directly, an internal reference solution accommodated in the second reservoir, and an inner reference electrode connected to a shielded cable extended through the other end of the outer tubular body and dipped in the internal reference solution.
The tip member for holding the first porous membrane is formed by a metal tube and at least a portion of the metal tube in contact with a solution to be tested is coated with an insulating film.

REFERENCES:
patent: 3483112 (1969-12-01), Ross
patent: 3598713 (1971-08-01), Baum et al.
patent: 3647666 (1972-03-01), Simon et al.
patent: 3840452 (1974-10-01), Baum et al.

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