Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10560804 | Talanta | 2005 | 6 Pages |
Abstract
A sensitive and selective procedure for the determination of trace silver(I) at alizarin violet modified carbon paste electrode has been developed. Silver(I) was accumulated on the electrode surface via complex formation with modifier in 0.1Â mol/L acetate buffer (pH 5.2). After electrochemical reduction of silver(I) had been carried out, the reoxidation wave of silver(0) appeared at 0.05Â V (versus SCE) on scanning the potential in the positive direction in 0.1Â mol/L H2SO4Â +Â 2.0Â ÃÂ 10â4Â mol/L KBr. For a preconcentration time of 3Â min, the detection limit is 1.0Â ÃÂ 10â10Â mol/L and the linear range is from 3.0Â ÃÂ 10â10 to 1.2Â ÃÂ 10â7Â mol/L. Many coexisting metal ions have little or no effect on the determination of silver(I). The proposed method was applied to the determination of silver in waste water and zinc alloy samples with satisfactory results.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Yi-Heng Li, Hong-Qi Xie, Fang-Qin Zhou,