文献类型：期刊文献

英文题名：Sensitive determination of trace mercury by UV-visible diffuse reflectance spectroscopy after complexation and membrane filtration-enrichment

作者：Yin, Changhai;Iqbal, Jibran;Hu, Huilian;Liu, Bingxiang;Zhang, Lei;Zhu, Bilin;Du, Yiping[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2012

卷号：233

起止页码：207

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20123215313545);WOS:【SCI-EXPANDED(收录号:WOS:000308277800027)】；

基金：The authors gratefully acknowledge the financial support for this project from the National Natural Science Foundation of China (20975039).

语种：英文

外文关键词：UV-visible diffuse reflectance spectroscopy (DRUVS); Mercury(II); Dithizone; Membrane filtration

摘要：A simple, sensitive and selective solid phase reflectometry method is proposed for the determination of trace mercury in aqueous samples. The complexation reagent dithizone was firstly injected into the properly buffered solution with vigorous stirring, which started a simultaneous formation of nanoparticles suspension of dithizone and its complexation reaction with the mercury(II) ions to make Hg-dithizone nanoparticles. After a definite time, the mixture was filtered with membrane, and then quantified directly on the surface of the membrane by using integrating sphere accessory of the UV-visible spectrophotometer. The quantitative analysis was carried out at a wavelength of 485 nm since it yielded the largest difference in diffuse reflectance spectra before and after reaction with mercury(II). A good linear correlation in the range of 0.2-4.0 mu g/L with a squared correlation coefficient (R-2) of 0.9944 and a detection limit of 0.12 mu g/L were obtained. The accuracy of the method was evaluated by the analysis of spiked mercury(II) concentrations determined using this method along with those determined by the atomic fluorescence mercury vapourmeter and the results obtained were in good agreement. The proposed method was applied to the determination of mercury in tap water and river water samples with the recovery in an acceptable range (95.7-105.3%). (C) 2012 Elsevier B.V. All rights reserved.