MWNT-石墨糊电极阳极溶出伏安法测定铅  

Determination of Pb at a MWNT-Carbon Paste Electrode by Anodic Stripping Voltammetry

作　　者：向伟[1] 李将渊[1] 王玉春[1] 唐自龙[1] 

机构地区：[1]西华师范大学化学化工学院,四川南充637002

出　　处：《西华师范大学学报（自然科学版）》2006年第2期209-213,共5页Journal of China West Normal University(Natural Sciences)

基　　金：四川省教育厅重点科研项目(2004A106)

摘　　要：制备了多壁碳纳米管(MWNT)-石墨糊电极,实验发现可用该电极阳极溶出线性扫描法测定Pb2+.实验表明以MWNT、石墨粉和液体石蜡的质量比为4∶4∶5的MWNT-石墨糊电极为工作电极,在-0.46V处测定出Pb2+的阳极溶出峰,其峰电流的二阶导数值与Pb2+浓度在1.06×10-7-1.06×10-5mol/L范围内呈线性关系,检出限为3×10-8mol/L.试样测定的回收率为97.0%-104.7%.The multi-wall carbon nanotubes（MWNT）-carbon paste electrode is prepared. It can determine Pb^2＋ by anodic stripping linear sweep vohammetry. A sensitive anodic stripping peak is at -4.6V（ vs. SCE） when mass ratio of MWNT, carbon and paraffine is 4：4：5 at MWNT-carbon paste electrode. The second derivative peak current is directly proportional to the concentration of Pb^2＋ in the range of 1.06 × 10^-7 - 1.06 × 10^-5 mol/L. The detectionlimit is 3 × 10^-8mol/L. The recovery of the sample is 97.0% - 104.7%.

关 键 词：MWNT-石墨糊电极 阳极溶出伏安法 铅 测定 

分 类 号：O642[理学—物理化学]