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2012 , Vol. 0 >Issue 05: 643 - 648

DOI: https://doi.org/10.6023/A1105052

研究论文

基于与HTPB 相互作用共振光散射法测定Hg2+

  • 王莹莹 ,
  • 谭克俊 ,
  • 袁睿
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  • 三峡库区生态环境教育部重点实验室 西南大学化学化工学院 重庆 400715

收稿日期: 2011-05-05

  修回日期: 2011-10-10

  网络出版日期: 2011-11-28

基金资助

国家自然科学基金(No. 20877063)和重庆市科学技术委员会基金(CSTC, 2007BB7360)资助项目.

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Determination of Hg2+ by Resonance Light Scattering Technique Based on the Interaction with HTPB

  • Wang Yingying ,
  • Tan Kejun ,
  • Yuan Rui
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  • Key Laboratory of Eco-Environments of Three Gorges Reservoir Region under Ministry of Education of PRC, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715

Received date: 2011-05-05

  Revised date: 2011-10-10

  Online published: 2011-11-28

Supported by

Project supported by the National Natural Science Foundation of China (No. 20877063) and the Chongqing Municipal Science and Technology Commission Foundation (CSTC, 2007BB7360).

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摘要

在酸性介质中, 汞(II)与过量溴离子反应生成四溴合汞(II)阴离子, 后者进一步与1-十六烷基三苯基溴化膦((1-Hexadecyl)triphenylphosphonium Bromide, HTPB)通过静电作用形成离子缔合体, 引起体系的共振光散射信号显著增强, 最大散射波长位于291.0 nm 处, 增强的散射信号强度与Hg2+浓度在0.04～1.5 μmol/L 范围内呈线性关系, 检测限(3σ)为4.0 nmol/L. 讨论了体系的最佳反应条件及外来物质的干扰, 同时研究了体系的吸收光谱, 并探讨了反应机理.建立的共振光散射法用于环境水样中Hg2+的测定, RSD≤4.42%.

关键词： Hg2+; 1-十六烷基三苯基溴化磷; 共振光散射

本文引用格式

王莹莹 , 谭克俊 , 袁睿 . 基于与HTPB 相互作用共振光散射法测定Hg2+[J]. 化学学报, 2012 , 0(05) : 643 -648 . DOI: 10.6023/A1105052

Abstract

In acidic medium, a resonance light scattering (RLS) analytical method of Hg(II) was established based on the enhanced RLS signal due to the interaction of (1-hexadecyl)triphenylphosphonium bromide (HTPB) and HgBr42- ion derived from the reaction between mercury ion and excess potassium bromide. The enhanced RLS intensity at 291.0 nm is proportional to the content of mercury(II) in a range of 0.04～1.5 μmol/L. The limit of detection (3σ) is 4.0 nmol/L. In this work, the optimum reaction conditions and the interference of foreign substances of the system were investigated. At the same time, the absorption spectral as well as the reaction mechanism were also investigated. This method has been successfully applied to the determination of mercury(II) in environmental samples with RSD≤4.42%.

Key words： mercury(II); (1-hexadecyl)triphenylphosphonium bromide; resonance light scattering

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