乙炔黑/双十六烷基磷酸复合膜传感器测定环境水样中痕量铜  

Determination of trace copper in environmental water by an acetylene black-dihexadecyl hydrogen phosphate composite film modified electrochemical sensor

作　　者：高鹏 杨春海[2] 

机构地区：[1]温州市环境监测中心站,浙江温州325000 [2]湖北民族学院化学系,湖北恩施445000

出　　处：《化学工程师》2007年第5期18-20,共3页Chemical Engineer

基　　金：湖北省自然科学基金项目(2004ABA235);湖北省教育厅重点项目(D200629004)

摘　　要：报道了一种用乙炔黑(AB)/双十六烷基磷酸(DHP)复合膜修饰的电化学传感器,该传感器能高灵敏度测定水样中痕量的Cu^(2+)。在pH值为4.5的磷酸盐缓冲溶液中,于-0.08V(vs.SCE)处有一灵敏的氧化峰。该修饰电极测定Cu^(2+)的线性范围为8×10^(-9)～5×10^(-7)mol·L^(-1),富集300s检测限为3×10^(-10)mol·L^(-1)。用该修饰电极测定了环境水样中的Cu^(2+),其结果与原子吸收测定值相符。An electrochemical sensor was modified by acetylene black - dihexadecyl hydrogen phosphate composite film for the determination of trace copper in water. In pH =4.5Na2HPO4 - NaH2PO4 buffer solution, the sensitive oxidation peak of Cu^2＋ was observed at - 0.08V with anodic tripping vohammetry, the oxidation current was a linear function of Cu^2＋ concentration in the range 8 × 10^-9 ～5 × 10^-7 mol · L^-1 and a low detection limit of 3 × 10^-10 mol · L^-1 was obtained under optimum conditions. This electrochemical sensor was applied to the determination of Cu^2＋ in the water samples and the results were in accordance with the atomic absorption spectrometry method.

关 键 词：乙炔黑(AB)/双十六烷基磷酸(DHP)复合膜 铜 化学传感器 溶出伏安法 

分 类 号：O657.13[理学—分析化学]