戊二醛双缩肼基二硫代甲酸苄酯为中性载体的新型镍离子选择电极的研究  

Studies of a novel nickel(Ⅱ) ion-selective electrode based on glutaraldehyde-bis(S-benzyldithiocarbazate) as a neutral carrier

作　　者：马钰华[1] 袁若[1] 柴雅琴[1] 刘新露[1] 

机构地区：[1]西南大学化学化工学院,发光与实时分析教育部重点实验室,重庆400715

出　　处：《化学传感器》2009年第2期31-35,共5页Chemical Sensors

基　　金：国家自然科学基金资助项目(20675064);重庆市自然科学基金资助项目(2005BB4100)

摘　　要：研究了以戊二醛双缩肼基二硫代甲酸苄酯(GABSB)为中性载体的阳离子选择电极,结果表明:该电极对Ni2+具有优良的电位响应性能和选择性,在pH=3.0的硝酸盐缓冲条件下对Ni2+的线性响应范围为7.6×10-6～1.0×10-1mol/L,斜率为31.0mV/dec(25℃),检测下限为4.2×10-6mol/L。采用紫外-可见光谱和交流阻抗分析技术研究了电极的响应机理。该电极具有响应快、检出限低、制备简单等优点,将该电极应用于电位滴定,结果令人满意。A highly selective and sensitive nickel （Ⅱ） electrode based on glutaraldehyde- bis （S-benzyldithiocarbazate） as a neutral carrier was developed. The electrode exhibits near-Nernstian potential response to nickel （ Ⅱ ） with a linear range from 7.6 × 10^-6 to 1.0 × 10^-1 mol/L, a detection limit of 4.2 × 10^-6 mol/L and a slope of 31.0 mV/dec in pH 3.0 at 25 ℃. The response mechanism was discussed in view of UV-vis spectroscopy and the A.C. impedance technique. The electrode has the advantages of high selectivity, low detection limit, good reproducibility and simplicity. The proposed electrode was successfully applied to an indicator electrode in potential titration.

关 键 词：离子选择性电极 戊二醛双缩肼基二硫代甲酸苄酯 电位响应性能 PVC膜 

分 类 号：O657.1[理学—分析化学]