Studies on Liquid Membrane Iodide Selective Electrode with Long Lifetime and High Selectivity

Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (4): 603.

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Studies on Liquid Membrane Iodide Selective Electrode with Long Lifetime and High Selectivity

ZENG Yun-Long¹, TANG Chun-Ran¹, SHENG Guo-Li², YU Ru-Qin²

1. Department of Chemistry, Shaoyang Teachers College, Shaoyang, 422000;
2. College Chemistry and Chemical Engineering, Hunan University, Institute of Chemometrics and Chemical Sensing Technology, Changsha, 410082

Received:1998-04-17 Online:1999-04-24 Published:1999-04-24

Abstract

Abstract: PVC-DZT-Hg(Ⅱ) compound was synthesized and used to prepare a high selectivity iodide electrode. The selectivity order of the electrode is I^-》ClO₄^->SCN^->NO₂》^-Sal^-Br^->NO₃^->Cl^-. The electrode has a linear response to iodide from 1×10^-3to 5×10^-7mol/Lwith a detection limit of 2×10^-7mol/Land a slope of (59±1) mV/decade(16℃ ). The response mechanism of the electrode was investigated by spectroscopic techniques. It was demonstrated that iodide anion acts with Hg in the carrier. The electrode was satisfyingly used for the determination of iodine content in the salts from different markets.

Key words: PVC-DTZ(diphenylthiocarbazone)-Hg(Ⅱ), Long-lifetime liquid membrane ion selective electrode, Iodine

CLC Number:

O657.15

TrendMD:

ZENG Yun-Long, TANG Chun-Ran, SHENG Guo-Li, YU Ru-Qin . Studies on Liquid Membrane Iodide Selective Electrode with Long Lifetime and High Selectivity[J]. Chem. J. Chinese Universities, 1999, 20(4): 603.

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Studies on Liquid Membrane Iodide Selective Electrode with Long Lifetime and High Selectivity

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