- 作者: Golamreza Khayatian* and Fatemeh Salehi Karoonian
- 作者服務機構: Department of Chemistry, Faculty of Science, University of Kurdistan, P.O. Box 416, Sanandaj, Iran
- 中文摘要: A new triiodide ion-selective electrode based on a charge-transfer complex of iodine with ditertbutyl- dicyclohexyl-18-crown-6 (t-Bu)2DC18C6 as membrane carrier was prepared. The electrode has a linear dynamic range from 6.3 ’ 10-3-5 ’ 10-6 with a Nernstian response of 58.6 ± 1 mV decade-1 and a detection limit of 1.3 ’ 10-6 M. The response time of the sensor was 25 s. The membrane could be used for two months without any divergence in potentials. The electrode exhibits an anti-Hofmeistetr selectivity sequence with a preference for triiodide at pH 2.0-10.0. The response mechanism of the electrode was investigated by Uv-Vis spectroscopic technique. The electrode can be used for the determination of ascorbic acid in orange juice.
- 英文摘要: --
- 中文關鍵字: Triiodide sensor; PVC membrane; Potentiometry.
- 英文關鍵字: --