Ionic activity measuring device

Details Ionic activity measuring device Ionic activity measuring device

1986-12-23

1988-11-08

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204416, 204435, 422 98, G01N 2726

Patent

active

047832517

ABSTRACT:
An ionic activity measuring device comprises ion selective electrodes, porous liquid distributing members for distributing a reference solution and a sample solution to the ion selective electrodes, a frame for housing the ion selective electrodes and the porous liquid distributing members and provided with a pair of liquid feed holes for feeding the reference solution and the sample solution to the porous liquid distributing members, and a porous bridge for achieving electrical conduction between the reference solution and the sample solution fed in drops to the liquid feed holes. The porous bridge is disposed in a recess formed in the surface of the frame so that the depth of the recess is not smaller than the height of the porous bridge. End portions of the porous liquid distributing members are protruded to regions under the liquid feed holes so that the fed solutions may enter from side faces of the end portions. The porous bridge may extend at positions deviated from centers of the liquid feed holes. The frame may be provided with holes for insertion of potential measuring probes, and air discharging holes.

REFERENCES:
patent: 4171246 (1979-10-01), Hamblen et al.
patent: 4273639 (1981-06-01), Gottenmeier
patent: 4437970 (1984-03-01), Kitajima et al.

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