茜素红S修饰活性炭碳糊电极对铜离子的测定  

Determination of Copper(Ⅱ) with Active Carbon Paste Electrode Modified with Sodium Alizarinsulfonate

作　　者：李陟[1] 齐菊锐[1] 黄振[1] 许宏鼎[1] 

机构地区：[1]吉林大学化学学院分析化学系,长春130023

出　　处：《吉林大学学报（理学版）》2005年第2期209-213,共5页Journal of Jilin University:Science Edition

摘　　要：将吸附修饰剂茜素红S(SodiumAlizarinsulfonate)的活性炭粉掺入碳糊中制成修饰碳糊电极,以应用于铜离子的阳极溶出法测定,响应电流与铜离子的浓度在1×10-8～3×10-3mol/L范围内呈良好的分段线性关系,最低检出限为5.6×10-9mol/L.多数离子不干扰.我们改进了传统修饰碳糊电极的做法,不仅保留了其原有的传统优点,而且活性炭的加入使电流有所提高,电极修饰剂稳定.A new sodium alizarinsulfonate modified active carbon paste electrode was development for Cu(Ⅱ) determination by means of anodic stripping voltammetry. The effects of some experimental parameters were studied, such as the best ratio of carbon paste, pH of supporting electrolyte, scan rate, preconcentration potential, preconcentration time and so on. The determination of Cu(Ⅱ) in the concentration range of 1×10 -8～3× 10 -3 mol/L exhibited four linear responses. The detection limit was estimated to be 5.6× 10 -9 mol/L(S/N=3). Many coexisting ions had little or no effect in the analysis procedure. The new electrode offers many advantageous properties such as high stability and analytical sensitivity.

关 键 词：茜素红S 活性炭粉 铜离子 修饰碳糊电极 

分 类 号：O657.1[理学—分析化学]