标题:Silver nanoplate-decorated copper wire for the on-site microextraction and detection of perchlorate using a portable Raman spectrometer
作者:Zhu, Sha;Zhang, Xiaoli;Cui, Jingcheng;Shi, Yu-e;Jiang, Xiaohong;Liu, Zhen;Zhan, Jinhua
作者机构:[Zhu, S] Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan Shandong, 25010 更多
通讯作者:Zhan, JH
通讯作者地址:[Zhan, JH]Shandong Univ, Dept Chem, Educ Minist, Key Lab Colloid & Interface Chem, Jinan 250100, Shandong, Peoples R China.
来源:The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry
出版年:2015
卷:140
期:8
页码:2815-2822
DOI:10.1039/c4an02109f
摘要:Perchlorate, which causes health concerns because of its effects on the thyroid function, is highly soluble and mobile in the environment. In this study, diethyldithiocarbamate (DDTC)-modified silver nanoplates were fabricated on a copper wire to perform the on-site microextraction and detection of perchlorate. This fiber could be inserted into water or soil to extract perchlorate through electrostatic interaction and then can be detected by a portable Raman spectrometer, owing to its surface-enhanced Raman (SERS) activity. A relatively stable vibrational mode (delta(HCH)(CH3), (CH2)) of DDTC at 1273 cm(-1) was used as an internal standard, which was negligibly influenced by the absorption of ClO4-. The DDTC-modified Ag/Cu fiber showed high uniformity, good reusability and temporal stability under continuous laser radiation each with an RSD lower than 10%. The qualitative and quantitative detection of perchlorate were also realized. A log-log plot of the normalized SERS intensity against perchlorate concentration showed a good linear relationship. The fiber could be also directly inserted into the perchlorate-polluted soil, and the perchlorate could thereby be detected on site. The detection limit in soil reached 0.081 ppm, which was much lower than the EPA-published safety standard. The recovery of the detection was 105% and comparable with the ion chromatography. This hyphenated method of microextraction with direct SERS detection may find potential application for direct pollutant detection free from complex sample pretreatment.
收录类别:SCOPUS;SCIE
WOS核心被引频次:18
Scopus被引频次:17
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952877464&doi=10.1039%2fc4an02109f&partnerID=40&md5=4d35e9218c936d82fecb7e36e1fe3248
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