Determination of Cu<sup>2+sup> in Drinking Water Based on Electrochemiluminescence of Ru(phen)<sub>3sub><sup>2+sup> and Cyclam
详细信息 查看全文
- 作者：Yulong Gao ; Tao Wang and Fengyu Liu
- 刊名：Electroanalysis
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：29
- 期：2
- 页码：441-447
- 全文大小：985K
- ISSN：1521-4109
文摘
A convenient and simple electrochemiluminescence (ECL) method was employed to detect trace amounts of Cu<sup>2+sup> in drinking water. This method is based on the inhibitory effect of Cu<sup>2+sup> on the ECL of Ru(phen)<sub>3sub><sup>2+sup> and 1,4,8,11-tetraazacyclotetradecane (cyclam) system. ECL intensity of Ru(phen)<sub>3sub><sup>2+sup> was considerably enhanced by the addition of cyclam because of the ECL reaction between them. The ECL intensity of Ru(phen)<sub>3sub><sup>2+sup>/cyclam system rapidy decreased with the addition Cu<sup>2+sup> because of the formation of chelate complex [Cu(cyclam)]<sup>2+sup>. Good linear response (R<sup>2sup>=0.9948) was obtained at Cu<sup>2+sup> concentration of 1.0×10<sup>−9sup>−1.0×10<sup>−5sup> mol ⋅ L<sup>−1sup> at glassy carbon electrode in 0.1 mol ⋅ L<sup>−1sup> phosphate buffer (pH 9.0). Observed detection limit of 4.8×10<sup>−10sup> mol ⋅ L<sup>−1sup> satisfied the maximum contaminant level goal (MCLG) for Cu<sup>2+sup> set by the US Environmental Protection Agency (US EPA). Applicability of the proposed method was verified by the good reproducibility and stability of the method when applied to determine Cu<sup>2+sup> in tap water and simulated wastewater. Thus, a novel ECL detection method was developed for Cu<sup>2+sup> detection.