- 作者: --
- 作者服務機構: Department of Chemistry, Faculty of Science, Kurdistan University, P.O. Box 416, Sanandaj, Iran
- 中文摘要: Two new highly selective triiodide electrodes have been prepared using charge-transfer complex of iodine with cryptand 222 as an electroactive ionophore and nitrophenyl octyl ether as a plasticizing agent. The electrodes showed Nernstian response to triiodide ions over a concentration range from 1.0 ’ 10-2 - 7.9 ’ 10-7 M and from 1.0 ’ 10-2 - 1 ’ 10-6 M with detection limits of 6.3 ’ 10-7 and 7.9 ’ 10-7 M for cryptand and its charge-transfer complex with iodine, respectively. The response times (t95%) of the sensors were 10 and 5 s. The membrane could be used for more than 1 month without any divergence in potentials. The proposed sensors exhibited very high selectivity for triiodide ion over other anions, and could be used in a wide pH range ~ 2-10. These electrodes were successfully applied as an indicator electrode in potentiometric titration of copper in ore samples.
- 英文摘要: --
- 中文關鍵字: Triiodide-selective electrode; Cryptand; Charge-transfer complex; Potentiometry.
- 英文關鍵字: --