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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (06): 757-760. 上一篇    

研究简报

新型五齿Schiff碱为敏感载体的铅(II)离子电极的电位响应行为

许文菊，袁若*，柴雅琴   

  1. (西南大学化学化工学院 重庆市现代分析化学重点实验室 重庆 400715)
  • 投稿日期:2010-04-23 修回日期:2010-10-26 发布日期:2010-11-26
  • 通讯作者: 袁若 E-mail:yuanruo@swu.edu.cn
  • 基金资助:

    国家自然科学基金项目;教育部培育项目;西南大学博士基金

Potential Response Behavior of a Pb(II) Ion Electrode Based on a New Pentadentate Schiff Base as a Sensing Carrier

XU Wen-Ju, YUAN Ruo, CHAI Ya-Qin   

  1. (School of Chemistry and Chemical Engineering, Southwest University, Chongqing Key Laboratory of Analytical Chemistry, Chongqing 400715)
  • Received:2010-04-23 Revised:2010-10-26 Published:2010-11-26
  • Contact: Ruo Yuan E-mail:yuanruo@swu.edu.cn

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以含N和O受体原子的新型五齿Schiff碱(HL)为敏感载体成功构建了高选择性铅(II)离子电极. 实验结果表明, 电极在Pb(NO3)2溶液和部分非水介质中对铅(II)离子具有选择性电位识别并呈现近Nernst线性响应. 在浓度为1.0× 10－1～1.5×10－5 mol/L的Pb(NO3)2溶液中, 电极响应斜率为31.4 mV/dec, 检测下限为1.0×10－5 mol/L. 在主要干扰离子镉(II)的浓度高出至少10倍的Pb(NO3)2溶液中, 目标电极对铅(II)离子仍然呈现有用的电位分析特性.

关键词: 五齿Schiff碱, 离子选择性电极, 铅(II)离子, 电位响应

In this work, a Pb(II) ion-selective electrode incorporating a new pentadentate Schiff base (HL) with N and O donor atoms as a sensing carrier was successfully constructed. The observations indicated that the proposed electrode showed preferential potential recognition and obvious near-Nernst response to Pb(II) ion in Pb(NO3)2 solution or partially non-aqueous media. The electrode gave a slope of 31.4 mV/dec to Pb(II) in a linear range of 1.0×10－1～1.5×10－5 mol/L with a detection limit of 1.0×10－5 mol/L. The useful potential analytical characteristics of the proposed electrode was also observed in Pb(NO3)2 solution in the presence of 10-fold concentration Cd(II) ion at least.

Key words: pentadentate Schiff base, ion-selective electrode, Pb(II) ion, potential response