乙二胺四乙酸二钠/碳糊修饰电极测定银离子  

An Ethylenediaminetetraacetic Acid Modified Carbon Paste Electrode for the Determination of Silver Ion

作　　者：张胜帮[1] 张学俊[1] 林祥钦[2] 

机构地区：[1]温州大学化学与环境工程学院,温州325027 [2]中国科学技术大学化学系,合肥230026

出　　处：《分析化学》2002年第6期745-747,共3页Chinese Journal of Analytical Chemistry

摘　　要：报道EDTA/碳糊修饰电极的制备及对银离子的测定。该电极在硝酸介质中 - 0 .6 0V(vs .Ag/AgCl)电位下富集Ag+ ,在 +0 .0 8V处得到一个灵敏的阳极溶出峰 ,峰电流与Ag+ 浓度在 1.0× 10 -9～ 1.0× 10 -6mol/L范围呈良好线性关系 ,检出限为 6 .8× 10 -10 mol/L。A sliver ion-sensitive ethylenediaminetetraacetic acid (EDTA) modified carbon paste electrode was constructed. The silver ion was pre-concentrated in 0.1 mol/L HNO3 medium at - 0.6 V (vs. Ag/AgCl) and the stripping voltammetric peak of Ag+ was measured at + 0. 08 V. The linear response was obtained in the range of 1.0 x 10(-9) similar to 1.0 x 10(-6) mol/L with a detection limit of 6.8 x 10(-10) mol/L.

关 键 词：修饰电极 测定 乙二胺四乙酸二钠 碳糊电极 银离子 溶出伏安法 分析 

分 类 号：O657.1[理学—分析化学]