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Effect of pressure on the potentiometric response of ion-selective electrodes and reference electrodes

✍ Scribed by Beat Müller; Peter C. Hauser

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
628 KB
Volume
320
Category
Article
ISSN
0003-2670

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✦ Synopsis

A study is presented on the influence of pressure of up to 30 bar on potentiometric cells. Combinations of a poly(viny1 chloride) (PVC) matrix nitrate ion-selective electrode with inner filling solution, a solid contact PVC nitrate electrode, a capillary flow type reference electrode, and a solid state reference electrode were tested. A linear increase of the potentials as a function of pressure was observed in all cases after an initially non-linear phase. The overall potential changes in the investigated pressure range were between 0.2 mV and 1.5 mV, slopes being typically 10 r.;V bar-' and 40 PV bar-' for nitrate electrodes with liquid filling solutions and for solid contact nitrate electrodes, respectively.

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