离子液体/半胱氨酸修饰电极测定抗坏血酸  

Determination of Ascorbic Acid at [CDIL]/L-cys/Au Self-Assembled Modified Electrode

作　　者：卫茂超[1] 徐帅[1] 段烁[1] 徐晓萌[1] 周长利[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2012年第4期358-360,共3页Journal of University of Jinan(Science and Technology)

基　　金：山东省自然科学基金(ZR2009BM034)

摘　　要：利用自组装膜技术,将离子液体和半胱氨酸修饰到金电极上,制备离子液体/半胱氨酸自组装膜修饰电极,以循环伏安法和交流阻抗法研究其电化学性质,并用于抗坏血酸(AA)的电催化氧化。结果显示:当AA的浓度在1×10-6～8×10-4mol/L范围内时,与所测得的氧化峰电流呈良好的线性关系,检出限为8.6×10-7mol/L。催化效果明显,可实现对AA的电化学检测。Ionic liquid/L-cysteine self-assembled modified gold electrode was prepared, and its electrochemical behavior was investigated by cyclic vohammetry and electrochemical impedance. The electro-oxidation of ascorhic acid （AA） was studied at the modified electrode. The obtained results show that a good linear relationship between the peak current of AA and its concentration is from 1×10-6～8×10-4mol/L,and the detect limit is 8.6 × 10-7 mol/L. The significant electrocatalysis of ascorbic acid means the modified electrode could be well applied in electrochemical determination.

关 键 词：离子液体 双层自组装膜 循环伏安法 抗坏血酸 

分 类 号：O657.3[理学—分析化学]