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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 28, Number 2
JKCSEZ 28(2)
April 20, 1984 

β-Ag3SI Single Crystal Membrane Electrode

β-Ag3SI 단결정막 전극에 관한 연구
Doo-Soon Shin, Seon-Cheon Lee

신두순, 이선천
β-Ag3SI의 단결정을 만들어 막전극으로의 응용을 살펴보았다. 그 결과 할로겐 이온들에 대해 감응함을 알았고, 분리용액법과 혼합용액법으로 할로겐 이온들에 대한 선택계수를 얻어 이론값과 비교검토 하였으며, 전위시간 곡선으로 부터 이 전극이 유리 전극기구에 의해 전도함을 알았고, 넓은 pH 범위에서 전위가 일정한 값을 가짐을 알았다. 한편 분석화학에의 응용을 살펴 본 결과 할로겐이온의 혼합용액에서 좋은 지시전극으로 사용할 수 있음을 알았다.

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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