DL-精氨酸/石墨烯修饰电极测定铅  

DL-Arginine/Graphene Modified Electrode Used in the Determination of Lead Content

作　　者：解文静[1] 

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161000

出　　处：《广州化工》2014年第2期88-89,123,共3页GuangZhou Chemical Industry

摘　　要：用循环伏安法制备DL-精氨酸／石墨烯修饰玻碳电极，研究金属铅在修饰电极上的电化学行为。在0．1mol／LpH=4．5的NaAc—HAc缓冲液中，以DL-精氨酸／石墨烯修饰电极作为工作电极，用循环伏安法测定-1．0～1．0V处的溶出峰电流。实验结果显示：铅的浓度与溶出峰电流具有良好的线性关系，范围是3．0×10^-9．0×10^-7mol／L，检测限为1．0×10^-10mol／L，用于测定金属结果满意。The DL- Arginine/Graphene modified glassy carbon electrode was prepared by cyclic vohammetry method. Meanwhile, the electrochemical behavior of metal lead ion on the electrode was studied. In the 0. 1 mol/L and pH =4.5 NaAc -HAc buffer solution, the modified electrode was used as working electrode to determine the stripping peak current at - 1 - 1 V by cyclic vohammetry method. The result showed that the concentration of lead ion and the stripping peak current were good linear relationship in the concentration range from 3.0× 10^ -9 mol/L to 9. 0 × 10^ -7 mog/L, and the detection limit was 1.0 × 10^-l0 mol/L. The prepared electrode showed satisfactory results in metal lead ion determination.

关 键 词：DL-精氨酸 修饰电极 铅离子 循环伏安法 

分 类 号：O657.1[理学—分析化学]