碳纳米管修饰电极的电化学行为及对酪氨酸的测定  

Electrochemical behavior of carbon nanotube modified electrode and its determination of tyrosine

作　　者：蔡卓[1] 莫丽君[1] 杜良伟[1] 莫创荣[1] 梁信源[1] 莫利书[1] 黄富嵘[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《化学研究与应用》2011年第3期309-312,共4页Chemical Research and Application

基　　金：广西自然科学基金资助项目(2010GXNSFA013001)

摘　　要：将经超声波处理的多壁碳纳米管液滴涂于碳糊电极上制成修饰电极(MWNTs/CPE)。应用循环伏安法研究了酪氨酸(Tyr)在修饰电极上的电化学行为。测定结果表明,酪氨酸在3.5×10-6～2.0×10-3mol/L浓度范围内与峰电流成良好的线性关系。回归方程为Ip(μA)=0.058C(μmol/L)+5.215,相关系数为r=0.9992(n=7),检出下限为3.2×10-7mol/L(S/N=3)。该修饰电极可应用于人尿中酪氨酸的测定。A multi-walled carbon nanotube modified carbon paste electrode（MWNTs / CPE） was prepared by dropping droplets of multi-walled carbon nanotube solution which was treated with ultrasonic wave on a bare carbon paste electrode.The electrochemical behaviors of Tyrosine at this modified electrode were studied using cyclic voltammetry.The experimental results indicated that the oxidation peak current showed a good linear relationship with Tyrosine concentration in the range of 3.5×10-6 ～2.0×10-3 mol/L.The regression equation was Ip（μA） = 0.058C（μmol/L）＋5.215,correlation coefficient r= 0.9992,and the detection limit was 3.2×10-7mol/L（S/N=3）.The modified electrode was be applied to the determination of tyrosine in human urine.

关 键 词：酪氨酸 多壁碳纳米管 修饰电极 循环伏安法 

分 类 号：O657.1[理学—分析化学]