核黄素在多壁碳纳米管修饰印刷电极上电化学行为及吸附溶出分析  

Electrochemical behavior studies and adsorptive stripping analysis of riboflavin at multi-walled carbon nanotubes modified screen-printed electrodes

作　　者：吴韶华[1] 聂法慧[1] 张玉明[1] 

机构地区：[1]福州大学化学与化工学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2008年第6期888-892,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福州大学科技发展基金资助项目(2006-XY-06);陈可冀中西医结合发展基金资助项目(CKJ2007031ZYX200709)

摘　　要：多壁碳纳米管-二(十六烷基)磷酸复合物修饰的丝网印刷电极(MWNTs-DHP-SPCE)应用于核黄素(RF)电化学行为研究.该电极反应受吸附控制,是等电子等质子的过程,其电子转移速率常数k0为2.8 s-1.循环伏安(CV)表明是MWNTs有效增强RF的溶出峰电流.采用方波伏安(SWV)对RF进行吸附溶出分析,开路电位下10 m in预富集,检出限可以达到4.2×10-9mol/L(S/N=3).该方法还成功应用于多种维生素药片中RF含量的测定.The electrochemical behavior of riboflavin （RF） at multi - walled carbon nanotubes - dihexadecyl phosphate composite modified screen - printed electrodes （ MWNTs - DHP - SPCEs ） was studied. The redox reaction of RF at MWNTs - DHP - SPCEs was a typical adsorptive - controlled process, involving equal numbers of electron and proton. The standard electron transfer rate constant k^0 was 2.8 s^-1. Square wave voltammetry （SWV） was employed for adsorptive stripping analysis of RF. With 10 min accumulation at open circuit, the detection limit of 4.2 ×10^-9 mol/L（ S/N = 3） could be obtained. The novel method was successfully applied to determination of RF in multi - vitamin tablets.

关 键 词：核黄素 多壁碳纳米管 印刷电极 吸附溶出分析 

分 类 号：O657.1[理学—分析化学]