聚L-精氨酸/石墨烯修饰电极测定诱惑红  

Determination of allura red by poly(L-arginine)-graphene modified electrode

作　　者：胡晴晴[1] 陶姣姣 刘旭[1] 孙登明[1] 

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《化学传感器》2016年第2期57-61,共5页Chemical Sensors

基　　金：国家级大学生创新创业训练计划项目(201610373033);安徽省大学生创新创业训练计划项目(201510373093)

摘　　要：利用电化学聚合法制备了聚L-精氨酸/石墨烯复合修饰电极,探究了诱惑红在此修饰电极上的电化学行为,建立了测定诱惑红的新方法。结果表明,修饰电极对诱惑红有较好的催化活性,在p H3.5的磷酸盐介质中,诱惑红在修饰电极上产生一对灵敏的氧化还原峰,峰电位分别为Epa=0.296 V和Epc=0.083 V。采用循环伏安法,对诱惑红进行测定的线性范围为7.50×10-7~1.00×10-4mol/L,检出限为1.0×10-8 mol/L。该修饰电极具有良好的稳定性和选择性,用于样品中诱惑红的测定,结果满意。The poly （L-arginine）-graphene modified electrode was fabricated and the electrochemical behaviors of allura red was studied by cyclic voltammetric method. A new method was developed for determination of allura red. The study results showed that the modified electrode has better catalytic ability to the allura red. In phosphate buffer solution at pH = 3.5, the redox peaks of allura red were Ep, = 0.296 V and Epc = 0.083 V. The linear range for the de- termination of allura red was 7.50×10^-7-1.00×10^-4 mol/L by cyclic voltammetric method. The detection limit was 1.0×10^-4mol/L. The modified electrode demonstrated excellent stability and selectivity. This method had been successfully applied to the determination of allura red in the sample with satisfactory results.

关 键 词：石墨烯 诱惑红 L-精氨酸 修饰电极 

分 类 号：O657.1[理学—分析化学]