中文摘要：

采用合成的Schiff碱金属络合物水杨醛肟铜（Ⅱ） 、锌（Ⅱ）、镍（Ⅱ）为中性载体制备阴离子选择性电极.结果表明：水杨醛肟铜（Ⅱ）对水杨酸根（Sal-）具有高选择性及优良的电位响应性能,电极呈现反Hofmeister选择性行为,其选择性次序为Sal^-〉ClO4^-〉SCN^-〉I^-〉NO2^-〉NO3^-〉Br^-〉Cl^-〉OAc^-〉SO4^2-.采用交流阻抗技术和紫外可见光谱技术研究了电极的响应机理.该电极具有响应快、重现性好、检出限低和制备简单等优点.将电极用于药品及人体尿液分析,结果令人满意.

英文摘要：

The response characteristics of a new potentiometric membrane electrode with unique selectivity towards salicylate ion （Sal^-） are reported. The electrode was prepared by incorporating bis-salicylaldoxime complex of copper（ Ⅱ ） into a plasticized polyvinyl chloride （PVC）-membrane. The optimized composition of membrane was 3.7 （w/w） ionophores, 63.4 （w/w） membrane solvent （o-NPOE） and 32.9 （w/w） PVC. The resulting electrode exhibits anti-Hofmeister selectivity sequence： Sal^- 〉 ClO4^- 〉 SCN^- 〉 I^- 〉 NO2^- 〉 NO3^- 〉 Br^- 〉 CI ^- 〉 OAc^ - 〉 SO4^2- and a near-Nernstian potential linear range for salicylate from 1.0 × 10^-1 to 7.0 × 10^-4 mol/L with a detection limit of 6.0 × 10^-6 mol/L and a slope of -58.5 mV/pCsal in pH 4.0 of phosphate buffer solution at 20℃. The ultraviolet-visible （UV/Vis） spectra and alternating current （ A. C. ） impedance studies showed that the excellent selectivity for salicylate was related to the unique interaction between the central metal and the analyte and a steric effect associated with the structure of the carrier. The electrode was successfully applied to the determination of salicylate in human urine and pharmaceutical preparations.