摘要
用循环伏安法制备了聚L 酪氨酸修饰玻碳电极,研究了多巴胺在聚L 酪氨酸修饰电极上的电化学行为,建立了循环伏安法测定痕量多巴胺的新方法。多巴胺在pH7.0的磷酸盐缓冲溶液中,在聚L 酪氨酸修饰玻碳电极上产生一对灵敏的氧化还原峰,峰电位分别为Epa=189mV,Epc=131mV。循环伏安法测定多巴胺的线性范围为1.0×10-3～1.0×10-8mol/L,检出限:1.0×10-9mol/L。方法可用于药剂中多巴胺的测定。
<Abstrcat>A poly(L-tyrosine) modified electrode has been prepared, and voltammetric behavior and voltammetric determination of dopamine have been studied at the poly (L-tyrosine) modified electrode. In pH 7.0 phosphate buffer solution. One pair of cedox peaks with E_(pa)=0.189 V, E_(pc)=0.131 V(vs. SCE) are obtained. The linear range for the determination of dopamine is 1.0×10^(-3)～1.0×10^(-8) mol/L. The detection limit is 1.0×10^(-9) mol/L. The method is applied to the determination of dopamine in injections with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2005年第7期28-31,共4页
Chinese Journal of Analysis Laboratory
基金
安徽省教育厅自然科学基金和淮北市科技计划基金资助项目(2001KJ196
2004KJ320
040145)
