磷脂-月桂酸膜修饰玻碳电极测定多巴胺及其电化学行为  

Determination of Dopamine at Glassy Carbon Electrode Modified with Lipid-Lauric Acid Membrane and Its Electrochemical Behavior

作　　者：金松子[1] 田文莉[1] 张春煦[1] 沈含熙[1] 静平[1] 

机构地区：[1]南开大学化学学院,天津300071

出　　处：《分析科学学报》2003年第2期105-108,共4页Journal of Analytical Science

基　　金：国家自然科学基金 ( No.2 9875 0 1 1 )

摘　　要：本文报道了多巴胺 (DA)在磷脂 -月桂酸修饰的玻碳电极上的电化学行为 ,在+ 0 .7～ -0 .4V(vs.Ag/ Ag Cl)电位范围内 ,于 p H 6.4的 0 .0 1 mol/ L的 KH2 PO4 -Na2 HPO4 底液中 ,多巴胺产生很灵敏的氧化峰电流。氧化峰电流与多巴胺浓度在 3 .1× 1 0 - 7～ 1 .2× 1 0 - 4mol/ L范围内呈良好线性关系。The present work reported the electrochemical behavior of dopamine at a lipid lauric acid modified glassy carbon electrode. In the potential range of +0.7^-0.4 V (vs. Ag/AgCl), a sensitive anodic peak was observed at +0.2 V at the scan rate of 40 mV/s. In the medium of 0.01 mol/L KH 2PO 4 Na 2HPO 4 (pH 6.4), the anodic peak current showed a linear relationship with the concentration of dopamine in the range of 3.1×10 -7 ~1.2×10 -4 mol/L. It can be used as an approach for determining dopamine with high sensitivity.

关 键 词：磷脂-月桂酸膜 膜修饰电极 玻碳电极 测定 多巴胺 神经送质 电化学 

分 类 号：Q42[生物学—神经生物学]