ELECTROCHEMICAL CELL, REFERENCE ELECTRODE AND ELECTROCHEMICAL METHOD

摘要

2063821 9101495 PCTABS00003 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.