Electrochemical cell, reference electrode and electrochemical method
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United States of America Patent
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May 17, 1994
Grant Date -
N/A
app pub date -
Mar 19, 1992
filing date -
Jul 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The concentration of an ionic species (e.g. K.sup.+) 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.
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