双安息香缩三乙四胺双核钴硫氰酸根的离子电极研究  

Studies on Highly Selective Thiocyanate Electrode Based on Bisbebzoin-semi-triethylenetetraamine Binuclear Cobalt Complex as Neutral Carriers

作　　者：王秀玲[1] 袁若[1] 徐岚[1] 柴雅琴[1] 孙志勇[2] 黄晓靖[1] 李群芳[1] 赵勤[1] 

机构地区：[1]西南师范大学化学化工学院现代分析重点实验室,重庆400715 [2]遵义医学院基础化学教研室,遵义563003

出　　处：《高等学校化学学报》2004年第4期633-635,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 970 5 0 0 1);教育部优秀青年教师资助计划 (批准号 :教人司 2 0 0 2 -4 0 );重庆市自然科学基金 (批准号 :2 0 0 2 -7477)资助

摘　　要：A new highly selective thiocyanate PVC membrane electrode based on bisbebzoin-semitriethylenetetraamine binuclear cobalt(Ⅱ) metallic complex [Co(Ⅱ) 2-BBSTA] as neutral carrier is reported, which displays an anti-Hofmeister selectivity sequence. The electrode exhibits Nernstian potential linear range to thiocyanate from 1.0×10 -1 to 1.0×10 -6 mol/L with a detection limit 8.0×10 -7 mol/L and a slope of -52.0 mV/dec in phosphorate buffer solution of pH=5.0 at 25 ℃. The response mechanism is discussed in view of the a.c. impedance technique and the UV spectroscopy technique. The electrode based on binuclear cobalt(Ⅱ) compound was used to determine the thiocyanate content in waste water with satisfactory results.A new highly selective thiocyanate PVC membrane electrode based on bisbebzoin-semitriethylenetetraamine binuclear cobalt(Ⅱ) metallic complex [Co(Ⅱ) 2-BBSTA] as neutral carrier is reported, which displays an anti-Hofmeister selectivity sequence. The electrode exhibits Nernstian potential linear range to thiocyanate from 1.0×10 -1 to 1.0×10 -6 mol/L with a detection limit 8.0×10 -7 mol/L and a slope of -52.0 mV/dec in phosphorate buffer solution of pH=5.0 at 25 ℃. The response mechanism is discussed in view of the a.c. impedance technique and the UV spectroscopy technique. The electrode based on binuclear cobalt(Ⅱ) compound was used to determine the thiocyanate content in waste water with satisfactory results.

关 键 词：双安息香缩三乙四胺双核钴 硫氰酸根 离子电极 中性载体 PVC膜离子选择电极 

分 类 号：TM911.48[电气工程—电力电子与电力传动]