分析测试学报2011，Vol.30Issue(2)：207-212,6.DOI:10.3969/j.issn.1004-4957.2011.02.018
基于Schiff-base结构化合物载体的汞离子选择性电极的制备与表征
Preparation and Characterization of a Mercury( Ⅱ )-selective Polymeric Membrane Electrode
摘要
Abstract
A new Schiff-base compound derived from 1, 2, 4-triazole was synthesized with a high yield. Potentiometric responses of poly(vinyl) chloride(PVC) electrode based on this ligand as neutral ionophore showed high sensitivity and selectivity towards Hg2+ ion. Effects of different plasticizers and amounts of ion-exchanger on the potentiometric response property of Hg2+ -selective electrode (Hg2+ -ISE) were discussed. The result indicated that, under the optimal membrane composition [PVC: 32.70, o-NPOE: 65.39, ionphore: 0.99, ion-exchanger: 0.92, (w : w)], a good Nernstian response slope of (29. 3 + 0. 3 ) mV/dec was obtained for Hg2 + in a wide concentration range of 1.0 × 10-6 -3.0 × 10-4 moL/L with a detection limit of 2. 6 × 10-7 mol/L. Except for silver ion, most of alkali metal, alkaline earth metal and other common transition metal ions didn't interfere the performance of the membrane electrode. The fabricated Hg2+ - ISE can be used in a wide pH range of 2. 8 -5.6 with a fast response time of less than 12 s and can be used for 3 month without any obvious change in potentiometric response. The proposed electrode was also successfully applied as indicator electrode in the potentiometric detection of Hg2+ in lab water by standard addition method and the results were confirmed by ICP- MS.关键词
离子选择性电极/汞离子/Schiff-baseKey words
ion-selective electrode/ mercury ion( Ⅱ ) / Schiff-base分类
化学化工引用本文复制引用
张军,赵月前,丁家旺,秦伟..基于Schiff-base结构化合物载体的汞离子选择性电极的制备与表征[J].分析测试学报,2011,30(2):207-212,6.基金项目
863国家高技术发展计划资助项目 (2007AA09Z103) （2007AA09Z103）
