PVC膜四氯络铁(Ⅲ)阴离子电极的研制

高等学校化学学报 ›› 1983, Vol. 4 ›› Issue (4): 529.

PVC膜四氯络铁(Ⅲ)阴离子电极的研制

龚洪钟, 朱元保, 曾云龙, 欧运归

湖南大学

收稿日期:1982-03-20 出版日期:1983-08-24 发布日期:1983-08-24

STUDIES ON CONSTRUCTION OF THE PVC-BASED MEMBRANE TETROCHLOROFERRATE (Ⅲ) ION-SELECTIVE ELECTRODE

Gong Hongzhong, Zhu Yuanbao, Zeng Yunlong, Ou Yungui

Hunan University, Changsha

Received:1982-03-20 Online:1983-08-24 Published:1983-08-24

摘要/Abstract

摘要： Cattrall等_[1]曾报导用Allqat 336S的四氯络铁(Ⅲ)酸盐为电活性物质制成铂基PVC膜涂层电极,并用于测定铁矿石中的铁含量_[2]。惜所用季铵盐碳链较短,检测下限欠佳。本文报导用长键季铵盐作活性物质,以制备其内导体系为溶液接触型的PVC膜四氯络铁(Ⅲ)阴离子选择电极的研究结果。

Abstract: Seven tetra-alkyl ammonium salts have been tested as the electro-active material for the PVC-based membrane tetrachloroferrate(Ⅲ) ion-selective electrodes. The electrode based on the tetrachloroferrate (Ⅲ) salt of trioctylhexadecylammonium as the electroactive material was considered to be the best. At 25℃, the electrode shows Nernstian response for tetrachloroferrate (Ⅲ) ion over the concentration range from l×10^-2M to 7×10^-6Miron (Ⅲ) with a slope of 60mV/pFe.The detection limit is down to 2.5×10^-6M iron (Ⅲ) in the 5M NaCl-0.05 MHC1 solution. Sn⁴⁺, Hg²⁺, Cd²⁺ and Zn²⁺ in a more or less extent interfere. The possibility of determination of iron (Ⅲ) in solutions of high Cl^- concentration has been discussed.

TrendMD:

龚洪钟, 朱元保, 曾云龙, 欧运归. PVC膜四氯络铁(Ⅲ)阴离子电极的研制. 高等学校化学学报, 1983, 4(4): 529.

Gong Hongzhong, Zhu Yuanbao, Zeng Yunlong, Ou Yungui . STUDIES ON CONSTRUCTION OF THE PVC-BASED MEMBRANE TETROCHLOROFERRATE (Ⅲ) ION-SELECTIVE ELECTRODE. Chem. J. Chinese Universities, 1983, 4(4): 529.