高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (4): 633.

• 研究简报 • 上一篇    下一篇

双安息香缩三乙四胺双核钴硫氰酸根的离子电极研究

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   

  1. 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
  • 收稿日期:2003-04-29 出版日期:2004-04-24 发布日期:2004-04-24
  • 通讯作者: 袁 若(1963年出生),男,博士,教授,博士生导师,从事电化学传感器研究.E-mail:yuanruo@swnu.edu.cn E-mail:yuanruo@swnu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29705001);教育部优秀青年教师资助计划(批准号:教人司2002-40);重庆市自然科学基金(批准号:2002-7477)资助

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

WANG Xiu-Ling1, YUAN Ruo1, XU Lan1, CHAI Ya-Qin1, SUN Zhi-Yong2, HUANG Xiao-Jing1, LI Qun-Fang1, ZHAO Qin1   

  1. 1. Key Laboratory of Modern Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest Normal University, Chongqing 400715, China;
    2. Department of Basic Chemistry, Zunyi Medical College, Zunyi 563003, China
  • Received:2003-04-29 Online:2004-04-24 Published:2004-04-24

关键词: 双安息香缩三乙四胺双核钴, 中性载体, 离子选择性电极, 硫氰酸根

Abstract: 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 1.0×10-6mol/L with a detection limit 8.0×10-7mol/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.

Key words: Bisbebzoin-semitriethylenetetraamine binuclear cobalt(Ⅱ), Neutral carrier, Ion-selective electrode, Thiocyanate

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