以水杨醛缩邻氨基苯甲酸合铜为中性载体的硫氰酸根PVC膜电极  

A New Thiocyanate Electrode Based on O-Hydroxybenzaldehyde O-aminobenzoic Acidic Copper (II) Complex as Neutral Carrier

作　　者：王秀玲[1] 杨红 虞春妹[1] 宫钦德[1] 张宁[1] 

机构地区：[1]苏州科技学院化学化工系,江苏苏州215009 [2]昆山巴城中学,江苏昆山215311

出　　处：《苏州科技学院学报（自然科学版）》2006年第1期54-57,共4页Journal of Suzhou University of Science and Technology （Natural Science Edition）

摘　　要：以水杨醛缩邻氨基苯甲酸合铜(II)[CuI(I)-HBAB]为中性载体,制备了一种对硫氰酸根(SCN-)具有优良的电位响应特性并呈现出反Hofmeister选择性行为的离子电极,其选择性次序为:SCN->ClO4->Sal->I->SO 32->NO3->Br->Cl->SO42-。该电极在pH=5.0的磷酸盐缓冲体系中具有最佳的电位响应,在1.0×10-6～1.0×10-1m ol/LSCN-浓度范围呈近能斯特响应,斜率为-57.5mV/dec(25℃),检测下限为5.0×10-7mol/L。采用交流阻抗和紫外光谱分析技术研究了配合物中心金属原子以及配合物本身的结构对电极电位响应行为的作用机理。将该电极用于废水分析,结果令人满意。A new selective thiocyanate PVC membrane electrode based on o-Hydroxybenzaldehyde o- aminobenzoic acidic Copper（Ⅱ） [Cu（Ⅱ）-HBAB] as neutral carrier has been developed, which displays an anti- ttofmeister selectivity sequence in following order： SCN^-〉CIO4^-〉Sal^-〉I^-〉SO3^2-〉NO3^-〉Br^-〉Cl^-〉SO4^2-. The electrode exhibits Nernstian potential linear range to thiocyanate from 1.0×10^-6 to 1.0×10^-1 mol/L with a detection limit 5.0×10^-7 mol/L and a slope of -57.5 mV/dec in ptt 5.0 of phosphorate buffer solution at 25 ℃. The response mechanism is discussed in view of the A.C. impedance technique and the UV spectroscopy technique. The electrode based on [Cu （Ⅱ）-HBAB] compound was used to analyze the thiocyanate content in waste water, which showed a satisfactory result.

关 键 词：水杨醛缩邻氨基苯甲酸合铜(Ⅱ) 中性载体 离子选择性电极 硫氰酸根 

分 类 号：O657[理学—分析化学]