期刊
ELECTROANALYSIS
卷 19, 期 12, 页码 1307-1314出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200603854
关键词
potentiometric; electrode; nanoporous; silica gel; silver; carbon paste
A new dipyridyl-functionalized silica gel (DPSG) was synthesized. The potentiometric response of silver ion was investigated at a carbon paste electrode chemically modified with functionalized nanoporous silica gel. The electrodes with a DPSG proportions of 10.1% (w/w), showed very stable potential. Calibration plots with Nernstian slopes for Ag+ were observed, 58.7 (+/- 0.9) mV decade(-1), over a wide linear range of concentration (5.0 x 10(-7) to 1.0 x 10(-1) M). ne electrode has a detection limit of 1.0 X 10(-7) M. The selectivity coefficients measured by the match potential method in acetate buffer, pH 5.5, were investigated. The electrode has fast response time, high performance, high sensitivity in wide cation activity ranges, and good long term stability (more than 6 months). The method was satisfactory and used to determine the concentration of silver ion in waste waters contaminated by this metal.
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