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.
出处
《化学工程师》
CAS
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)
