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报道了以Cu(Ⅱ)配合物为中性载体的PVC膜电极对水杨酸根(Sal-)具有优良的电位响应性能和选择性并呈现出反Hofmeister选择性行为,其选择性从大到小次序为Sal-,ClO4-,SCN-,I-,NO2-,Cl-,F-,Br-,H2PO4-.在pH=4.0的磷酸盐缓冲体系中,电极电位呈现近能斯特响应,线性响应范围为3.0×10-6~1.0×10-1mol/L Sal-,斜率为-58.7 mV/dec(20℃),检测下限为1.5×10-6mol/L.采用交流阻抗技术研究了电极的响应机理,结果表明,配合物中心金属原子的结构以及载体本身的结构与电极的响应行为之间有非常密切的构效关系.电极可用于药品分析.
Reported that PVC membrane electrode with Cu (Ⅱ) complex as neutral carrier has excellent potential response and selectivity to salicylate (Sal-) and exhibits anti-Hofmeister selective activity with selectivity from large to small The order is Sal-, ClO4-, SCN-, I-, NO2-, Cl-, F-, Br-, H2PO4-. In pH = 4.0 phosphate buffer system, the electrode potential exhibits near Nernstian response, The response range was 3.0 × 10-6 ~ 1.0 × 10-1mol / L Sal-, the slope was -58.7 mV / dec (20 ℃) and the detection limit was 1.5 × 10-6mol / L. The electrochemical impedance spectroscopy Response mechanism, the results show that there is a very close structure-activity relationship between the structure of the metal atom in the complex center and the structure of the carrier itself and the response of the electrode, and the electrode can be used for drug analysis.