中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (08): 950-954.DOI: 10.3724/SP.J.1095.2010.90737

• 研究论文 • 上一篇    下一篇

水杨醛缩邻苯二胺双席夫碱敏感膜Cu(Ⅱ)离子选择性电极及SCN-的测定

巩春霞,魏小平,李建平*   

  1. (桂林理工大学化学与生物工程学院 桂林 541004)
  • 收稿日期:2009-11-10 修回日期:2010-02-04 出版日期:2010-08-10 发布日期:2010-08-10
  • 通讯作者: 李建平，男，博士，教授; E-mail:likianping@263.net; 研究方向：电分析化学与生物传感器
  • 基金资助:
    广西教育厅科研基金（桂教科200508135）和广西研究生教育创新人才联合培养基地资助项目

Fabrication and Application in SCN- Detection of Copper(Ⅱ) Ionic Selective Electrode Based on Salicylaldehyde-1,2-phenylenediamine Sensitive Membrane

GONG Chun-Xia, WEI Xiao-Ping, LI Jian-Ping*   

  1. (College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541004)
  • Received:2009-11-10 Revised:2010-02-04 Published:2010-08-10 Online:2010-08-10

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1602

被引次数

2

摘要：

用水杨醛和邻苯二胺合成了水杨醛缩邻苯二胺双席夫碱（SPS），将其作为中性载体与碳粉混合，以液体石蜡为粘合剂，制备出能斯特响应铜(Ⅱ)离子选择性电极，应用于SCN-的测定。 SCN-浓度在1.0×10-6~1.0×10-2 mol/L之间时该电极对其具有能斯特响应，检测下限为4.0×10-7 mol/L。 在pH值为3.5~4.6的SCN-溶液中，电极的响应时间均小于30 s。电极的稳定性好，灵敏度高，使用寿命长，已用于废水中SCN-的分析。

关键词: SCN-, 离子选择性电极, 水杨醛缩邻苯二胺双席夫碱

Abstract:

Salicylaldehyde-1,2-phenylenediamine(SPS) was synthesized by the reaction of salicylaldehyde with phenylenediamine. A copper(Ⅱ) ionic selective electrode with a sensitive membrane consisted of carbon paste and neutral SPS carrier was fabricated with liquid paraffin as the binder. The Cu(Ⅱ) selective electrode was deployed to determine the concentration of SCN- anion and exhibited a Nernstian response to SCN- ions over a range of 1.0×10-6~1.0×10-2 mol/L, with a regression equation of E(mV)=-51.19 lgcSCN--853.75(r=0.9997) and a detection limit of 4.0×10-7 mol/L. The response time of the electrode is less than 30 s. The electrode also shows a high selectivity, good stability and durability. The electrode has been successfully applied in determing the concentrations of SCN- in waste water samples.

Key words: SCN-, ion-selective electrode, salicylaldehyde-phenylendiamine

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