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KMID : 1059519840280020086
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Journal of the Korean Chemical Society
1984 Volume.28 No. 2 p.86 ~ p.94
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β-Ag3SI Single Crystal Membrane Electrode
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Shin Doo-Soon
Lee Seon-Cheon
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Abstract
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The single crystal ion-selective electrode, β-Ag3SI/PVC-THF membrane electrode has showed a linear potential response to the activities of iodide ion (10-1~10-7M). The β-Ag3SI membrane electrode was compared with AgI/PVC-THF membrane and copper metal plate membrane electrodes. In order to measure the selectivity coefficient of the electrodes toward Cl- and Br-, the separation and mixed solution method were employed. The potential-time curve was obtained by the usual immersion technique and pH effect was also examined. The orders of selectivity for Br-, Cl- and stability of response time are β-Ag3SI/PVC-THF membrane > AgI/PVC-THF membrane > copper metal plate membrane. These electrodes could be used as indicating electrodes in the potentiometric titration of a single halide and mixed halides with the standard solution of silver nitrate.
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