基于双核三苄基甲醇锡(Ⅳ)对苯二甲酸酯配合物为中性载体的硫氰酸根电极的研究被引量：2

Study on Selective Thiocyanate Electrode Based on Bis-tribenzyl-emethoxide- tin Terephthalate Complex as Neutral Carriers

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摘要研究了双核三苄基甲醇锡(Ⅳ)对苯二甲酸酯配合物［Sn(Ⅳ)-BTMTT］为中性载体的PVC膜阴离子选择性电极。这类电极对硫氰酸根离子呈现出优良的电位响应性能和选择性,并呈现反Hofmeister序列行为。其选择性序列为:SCN-＞I-＞Ac-＞－NO＞2－2NO＞－4ClO＞Cl-＞3－4SO,该电极在pH＝3.0的磷酸盐缓冲体系中对SCN-在0.1～8×10-5mol／L浓度范围内呈超能斯特响应,斜率为-77.3mV／dec,检出限为4.0×10-5mol／L。采用交流阻抗及紫外光谱研究了阴离子与载体的作用机理。该电极具有响应快、重现性好、制备简单等优点。将该电极用于废水分析,结果令人满意。 A newhighly selective thiocyanate PVC membrane electrode based on bis_tribenzyl_methoxide_ tin terephthalate complexas neutral carrier is made.This type of electrode displays an anti_Hofmeister seˉlectivity sequence:SCN - >I - >Ac - > 2- NO> - ClO 4 >Cl - > -3 NO> 2-4 SO.The electrode exhibits Supˉper-Nernstian potential linear range to thiocyanate from1.0×10 -1 to8.0×10 -5 mol/L with a detecˉtion limit of4.0×10 -5 mol/L and a slope of-77.3mV/dec in pH3.0of phosphorate buffer solution at25℃.The response mechanismis discussed in viewof the a.c.impedance technique and the UVspecˉtroscopic technique.The electrode has the advantage of simplicity,fast response,fair stability and reproˉducibility.

作者王秀玲袁若徐岚柴雅琴黄晓清李群芳赵勤王韬苏正峰

机构地区西南师范大学化学化工学院现代分析重点实验室

出处《分析测试学报》 CAS CSCD 北大核心 2004年第4期29-32,共4页 Journal of Instrumental Analysis

基金国家自然科学基金资助项目(29705001) 教育部优秀青年教师资助计划重庆市自然科学基金

关键词双核三苄基甲醇锡(Ⅳ)对苯二甲酸酯中性载体离子选择性电极硫氰酸根 Bis-tribenzyl-methoxide-tin terephthalate Neutral carrier Ion-selective electrode Thio- cyanate

分类号 O657.15 [理学—分析化学] O622.7 [理学—有机化学]

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