文献类型：期刊文献

英文题名：Facile On-Site Detection of Substituted Aromatic Pollutants in Water Using Thin Layer Chromatography Combined with Surface-Enhanced Raman Spectroscopy

作者：Li, Dawei[1,2];Qu, Lulu[1,2];Zhai, Wenlei[1,2];Xue, Jinqun[1,2];Fossey, John S.[1,2,3];Long, Yitao[1,2]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England

年份：2011

卷号：45

期号：9

起止页码：4046

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20111813955542);WOS:【SCI-EXPANDED(收录号:WOS:000289819400037)】；

基金：This research was supported by the National High-Tech Research and Development Program 863 of China (Project No: 2008AA06A406), National Nature Science Foundation of China (Project No: 21007015) and Shanghai Postdoctoral Sustentation Fund of China (Project No: 09R21411700). The Program supports YTL for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning. Y. T.L. and J.S.F. thank the CAtalysis and Sensing for our Environment (CASE) network, and the CASE09 workshop at ECUST that initiated interaction helping completion of this manuscript. J.S.F. thanks the University of Birmingham and AWM ERDF II for support and ECUST for a visiting Professorship.

语种：英文

外文关键词：Separation - Water pollution - Spectrometers - Colloids - Substrates - Raman spectroscopy - Sodium chloride - Aromatization - Light transmission - Thin layer chromatography

摘要：A novel facile method for on-site detection of substituted aromatic pollutants in water using thin layer chromatography (TLC) combined with surface-enhanced Raman spectroscopy (SERS) was explored. Various substituted aromatics in polluted water were separated by a convenient TLC protocol and then detected using a portable Raman spectrometer with the prepared silver colloids serving as SERS-active substrates. The effects of operating conditions on detection efficacy were evaluated, and the application of TLC-SERS to on-site detection of artificial and real-life samples of aromatics/polluted water was systematically investigated. It was shown that commercially available Si 60-F-254 TLC plates were suitable for separation and displayed low SERS background and good separation efficiency, 2 mM silver colloids, 20 mM NaCl (working as aggregating agent), 40 mW laser power, and 50 s intergration time were appropriate for the detection regime. Furthermore, qualitative and quantitative detection of most of substituted aromatic pollutants was found to be readily accomplished using the developed TLC-SERS technique, which compared well with GC-MS in terms of identification ability and detection accuracy, and a limit of detection (LOD) less than 0.2 ppm (even at ppb level for some analytes) could be achieved under optimal conditions. The results reveal that the presented convenient method could be used for the effective separation and detection of the substituted aromatic pollutants of water on site, thus reducing possible influences of sample transportation and contamination while shortening the overall analysis time for emergency and routine monitoring of the substituted aromatics/polluted water.