利用电化学方法研究了2,3-二巯基乙二酸(DMSA)自组装膜的电化学行为,发现DMSA自组装膜对于多巴胺和尿酸的氧化能够起到明显的电催化作用.在优化条件下,多巴胺与尿酸的氧化峰电流分别与其浓度在1.0×10-4～1.0×10-3和8.0×10-4～9.0×10-3 mol/L内呈良好的线性关系,检出限分别为3.0 ×10-5和8.0×10-5 mol/L.该电极用于实际样品的测定,结果满意.
[1] ZHAO H, ZHANG Y, YUAN Z. Study on the electrochemical behavior of dopamine with poly(sulfosalicylic acid) modified glassy carbon electrode [J]. Analytica Chimica Acta 2001, 441.
[2] ZHENG L, WU S, LIN X. Selective determination of uric acid by using a β-Cyclodextrin modified electrode [J]. ELECTROANALYSIS 2001, 13.
[3] Zhiqiang Gao, Hai Huang. Simultaneous determination of dopamine, uric acid and ascorbic acid at an ultrathin film modified gold electrode [J]. Chemical communications 1998, 19(19).
[4] Jyh-Myng Zen, Cheng-Teng Hsu, Yi-Lan Hsu, Jun-Wei Sue, Eric D. Conte. Voltammetric Peak Separation of Dopamine from Uric Acid in the Presence of Ascorbic Acid at Greater Than Ambient Solution Temperatures [J]. Analytical chemistry 2004, 14(14).
[5] MILLER C, CUENDET P, GRATZEL M. Adsorbed omega-hydroxy thiol monolahers on gold electrodes-evidebce for electron-tunneling to redox species in solution [J]. Journal of Physical Chemistry 1991, 95.
[6] PORTER M D, BRIGHT T B, ALLARA D L. Spontaneously organized molecular assemblies:4.structural characterization of normal-alkyl thiol monolayers on gold by optical ellipsometry, infrared-spectroscopy, and electrochemistry [J]. Journal of the American Chemical Society 1987, 109.
[7] Niu LM, Luo HQ, Li NB. Electrochemical behavior of dopamine at a penicillamine self-assembled gold electrode and its analytical application. [J]. Archiv der Pharmazie 2006, 7(7).
[8] Ling Mei Niu, Hong Qun Luo, Nian Bing Li. Electrochemical Behavior of Uric Acid at a Meso-2, 3-Dimercaptosuccinic Acid Self-Assembled Gold Electrode [J]. Instrumentation science & technology: Designs and applications for chemistry, biotechnology, and environmental science 2007, 26(26).
