基于与HTPB 相互作用共振光散射法测定Hg2+

doi:10.6023/A1105052

化学学报 ›› 2012, Vol. 0 ›› Issue (05): 643-648 .DOI: 10.6023/A1105052 上一篇下一篇

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

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

投稿日期:2011-05-05 修回日期:2011-10-10 发布日期:2011-11-28
通讯作者: 谭克俊 E-mail:tankj@swu.edu.cn
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.

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

Wang Yingying, Tan Kejun, Yuan Rui

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:2011-05-05 Revised:2011-10-10 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/Abstract

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

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 HgBr₄^2- 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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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 .

Wang Yingying, Tan Kejun, Yuan Rui. Determination of Hg²⁺ by Resonance Light Scattering Technique Based on the Interaction with HTPB[J]. Acta Chimica Sinica, 2012, 0(05): 643-648 .

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基于与HTPB 相互作用共振光散射法测定Hg²⁺

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

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