A sensitive resonance light scattering spectrometry of trace Hg2+ with sulfur ion modified gold nanoparticles

被引：86

作者：

Fan, Ya ^{[1
]}

Long, Yun Fei ^{[2
]}

Li, Yuan Fang ^{[1
]}

机构：

[1] Southwest Univ, Educ Minist Key Lab Luminescene & Real Time Anal, Coll Chem & Chem Engn, Chongqing 400715, Peoples R China

[2] Hunan Univ Sci & Technol, Inst Chem & Chem Engn, Xiangtan 411201, Hunan, Peoples R China

来源：

ANALYTICA CHIMICA ACTA | 2009年 / 653卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Gold nanoparticles; Sulfide; Mercury; Resonance light scattering spectrometry; RAYLEIGH-SCATTERING; AQUEOUS-MEDIA; COLORIMETRIC DETECTION; SELECTIVE DETECTION; FLUORESCENCE PROBE; DNA HYBRIDIZATION; NUCLEIC-ACIDS; T-LYMPHOCYTES; MERCURIC ION; MERCURY(II);

D O I：

10.1016/j.aca.2009.09.017

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Anew resonance light scattering (RLS) spectrometric method for mercury ions (Hg2+) in aqueous solutions with sulfur ion (S2-) modified gold nanoparticles (Au-NPs-S) has been developed in this contribution. It was found that S2- at the surface of Au-NPs resulting from the surface modification can interact with Hg2+ to form very stable S-Hg-S bonds when Hg2+ Concentration is lower than that of S2-, resulting in the aggregation of Au-NPs-S and causing enhanced RLS signals. The enhanced RLS intensities (GIRLS) characterized at 392 nm were found to be proportional to the concentration of Hg2+ in the range of 0.025-0.25 mu mol L-1 with a detection limit (3 sigma) of 0.013 mu mol L-1. Our results showed that this approach has excellent selectivity for Hg2+ over other substances in aqueous solutions. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：207 / 211

页数：5

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