漆酚铝高分子修饰碳糊电极用于溶出伏安法测定痕量银  

Anodic Stripping Voltammetric Determination of Trace Silver Using Polymeric Compound of Urushiol-Al Modified Carbon Paste Electrode

作　　者：杨春海[1] 

机构地区：[1]湖北民族学院化学与环境工程学院,恩施445000

出　　处：《应用化学》2003年第6期597-599,共3页Chinese Journal of Applied Chemistry

基　　金：湖北省教育厅重点科研项目 ( 2 0 0 2X0 11)

摘　　要：A polymeric compound of urushiol Al modified carbon paste electrode was examined for the determination of trace silver in water. In 0 1 mol/L KNO 3 and HAc NaAc solution(pH=5 5), silver is accumulated on the surface of the modified carbon paste electrode at -0 1 V( vs .SCE). In the following step, a sensitive oxidation peak of Ag + at 0 22 V could be observed by anodic stripping voltammetry. The peak current is linearly related to the concentration of silver ranged from 4 0×10 -9 mol/L to 2 5×10 -7 mol/L. The detection limit(signal to noise=3) is 1 5×10 -10 mol/L after 20 min accumulation, the average recovery is 100 3%.A polymeric compound of urushiol Al modified carbon paste electrode was examined for the determination of trace silver in water. In 0 1 mol/L KNO 3 and HAc NaAc solution(pH=5 5), silver is accumulated on the surface of the modified carbon paste electrode at -0 1 V( vs .SCE). In the following step, a sensitive oxidation peak of Ag + at 0 22 V could be observed by anodic stripping voltammetry. The peak current is linearly related to the concentration of silver ranged from 4 0×10 -9 mol/L to 2 5×10 -7 mol/L. The detection limit(signal to noise=3) is 1 5×10 -10 mol/L after 20 min accumulation, the average recovery is 100 3%.

关 键 词：痕量银 漆酚铝树脂 修饰碳糊电极 溶出伏安法 

分 类 号：O657.13[理学—分析化学]