ELECTROCHEMICAL CELL,REFERENCE ELECTRODE AND ELECTROCHEMICAL METHOD

摘要

PCT No. PCT/GB90/01016 Sec. 371 Date Mar. 19, 1992 Sec. 102(e) Date Mar. 19, 1992 PCT Filed Jul. 2, 1990 PCT Pub. No. WO91/01495 PCT Pub. Date Feb. 7, 1991.The concentration of an ionic species (e.g. K+) is determined using an ion sensitive electrode having an appropriate membrane (e.g. valinomycin in plasticised PVC). In place of a conventional reference electrode, the half cell is completed with an electrode having an identical membrane but lacking the constituent producing the ion-selective response (e.g. plasticised PVC). The working and reference electrodes can then be made in substantially the same manner to null of interferents. The difficulties associated with double junctions are avoided.