摘要
报道了以5-溴水杨醛缩邻氨基苯酚合钴（Ⅱ）[Coa（Ⅱ））-L]金属配合物为中性载体的阴离子选择性电极．该电极对水杨酸根（Sal^-）具有优良的电位响应性能和选择性，并呈现反Hofmeister选择性行为，其选择性从大到小依次为：Sal^-，ClO4^-，SCN^-，I^-，NO3^-，HCO3^-，Br^-，NO2^-，SO3^2-，F^-，Cl^-，SO4^2-．在pH为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8.0×10^-6～1．0×10^-1mol／L，斜率为-60．3mV／decade，检测下限为4．0×10^-6mol／L．采用紫外可见光谱技术和交流阻抗技术研究了电极的响应机理，结果表明载体本身的结构与电极的响应性能间有非常密切的关系．电极用于药品分析，其结果令人满意．
A novel salicylate-selective electrode based on 5-bromide o-salicyladehyde-aminophenol complexes of Co（Ⅱ） as ionophore is described, which exhibits high selectivity for salicylate over many other common anions with the following anti-Hofmeister selectivity sequence： Sal^- , ClO4^- , SCN^- , I^- , NO3^- , HCO3^- , Br^- , NO2^- , SO3^2- , F^- , Cl^- , SO4^2-. The electrode exhibits a near-Nernstian response to the salicylate ion range from 8.0×10^-6 to 1.0×10^-1 mol/L, which has a detection limit of 4.0×10^-6 mol/L and a slope of -60.3 mV/decade in a phosphate buffer solution of pH=4.0. The response mechanism is discussed by means of AC impedance and UV spectroscopy technique, The electrode is applied to medicine analysis, and satisfactory results are obtained.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第11期82-85,共4页
Journal of Southwest University(Natural Science Edition)
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(CSTC22004BB4149
2005BB4100)
西南大学高新技术培育基金资助项目(XSGX02)
