聚茜素红-多壁碳纳米管复合膜修饰电极的研制及叶酸含量测定  

Determination of Folic Acid by Composite Film Electrode Modified with Poly-Alizarin Red and Multi-walled Carbon Nanotubes

作　　者：杜学萍[1] 娄童芳[1] 董莹[1] 屈建莹[1] 

机构地区：[1]河南大学化学化工学院环境与分析科学研究所,河南开封475004

出　　处：《电化学》2014年第5期482-485,共4页Journal of Electrochemistry

基　　金：河南省教育厅科学技术研究重点计划项目(No.13A150077)资助

摘　　要：采用电聚合方法将茜素红（AR）非共价修饰到多壁碳纳米管（MWCNTs）上,制得了PAR/MWCNTs/GC电极,该电极对叶酸（FA）具有良好的电催化作用.结果表明,在最佳实验条件下,在-0.63 V处叶酸还原峰电流与浓度（1.25×10-6～4.00×10-5mol·L^-1）呈现良好线性关系,相关系数0.9985.用标准加入法检测了回收率,其值达92.0%～103.0%.该电极制作简单,有良好的稳定性.The novel modified electrode was fabricated by electropolymerizing alizarin red onto the surface of multi-walled car- bon nanotubes on glassy carbon electrode surface, which exhibited good electrocatalytic activity for folic acid. The experimental re- sults showed that the reduction peak current of folic acid at -0.63 V was linear to its concentration over the range of 1.25×10-6～4.00× 10.5 mol-L-1 in the optimized experimental conditions （R = 0.9985）. Test for recovery was carried out by standard addition method, and the recovery ratios were in the range of 92.0% - 103.0%. The modified electrode was prepared simply with excellent stability, which provides a new feasible method for determination of folic acid.

关 键 词：叶酸 多壁碳纳米管 茜素红 

分 类 号：O646.54[理学—物理化学] TQ466.2[理学—化学]