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电化学  2012 

柠檬酸修饰(CA/GC)电极对抗坏血酸(AA)、多巴胺(DA)和尿酸(UA)的同时检测

, PP. 79-83

Keywords: 抗坏血酸,多巴胺,尿酸,柠檬酸,修饰电极

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Abstract:

研究柠檬酸(CA)修饰玻碳电极(CA/GC)在抗坏血酸(AA)、多巴胺(DA)和尿酸(UA)混合体系中的循环伏安(CV)行为.结果表明,AA、DA和UA在CA/GC电极上氧化峰电流增大且三者氧化峰电位能彼此分离(ΔEpDA,AA=170mV,ΔEpDA,UA=130mV,ΔEpAA,UA=300mV),据此可同时检测AA、DA和UA.在优化的实验条件下,AA、DA和UA的氧化峰电流与其浓度分别在2.0×10-6~1.5×10-3mol?L-1,6.0×10-7~1.0×10-3mol?L-1,6.0×10-7~1.0×10-3mol?L-1范围内呈线性关系.该电极重现性好,可用于盐酸多巴胺针剂中DA、VC片剂中AA及人尿液中UA的测定.

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