期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 186, 期 2-3, 页码 1131-1135出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.11.103
关键词
Lead ion-selective electrode; Ionic liquids; Solid contact; Potentiometry
A new polyvinylchloride membrane sensor for Pb2+ with solid contact based on ionic liquid has been prepared. The electrode shows a Nernstian response for lead ions over a wide concentration range (1 x 10(-8) to 1 x 10(-1) mol L-1) and the slope of 29.8 mV/decade. The limit of detection is 4.3 x 10(-9) mol L-1. It has a fast response time of 5-7 s and can be used for 4 months without any divergence in potential. The proposed sensor is not pH sensitive in the range 3.5-7.3 and shows a very good discriminating ability towards Pb2+ ion in comparison with some alkali, alkaline earth, transition and heavy metal ions. It was successfully applied as an indicator electrode in potentiometric titration of lead ions with K2CrO4 and for direct determination of Pb2+ ions in real sample solution. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据