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Determination of six sulfonylurea herbicides in environmental water samples by magnetic solid-phase extraction using multi-walled carbon nanotubes as adsorbents coupled with high-performance liquid chromatography.

Authors
  • Ma, Jiping1
  • Jiang, Lianhua2
  • Wu, Gege2
  • Xia, Yan2
  • Lu, Wenhui3
  • Li, Jinhua3
  • Chen, Lingxin4
  • 1 School of Environmental & Municipal Engineering, Qingdao Technological University, Qingdao 266033, China. Electronic address: [email protected] , (China)
  • 2 School of Environmental & Municipal Engineering, Qingdao Technological University, Qingdao 266033, China. , (China)
  • 3 Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. , (China)
  • 4 Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Journal of chromatography. A
Publication Date
Sep 30, 2016
Volume
1466
Pages
12–20
Identifiers
DOI: 10.1016/j.chroma.2016.08.065
PMID: 27590086
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Magnetic solid-phase extraction (MSPE) using magnetic multi-walled carbon nanotubes (mag-MWCNTs) as adsorbents, coupled with high-performance liquid chromatography-diode-array detector (HPLC-DAD), was developed for the simultaneous separation and determination of six types of sulfonylurea herbicides (SUs) in environmental water samples. Several variables affecting MSPE efficiency were systematically investigated, including the type and volume of desorption solvent, sample solution pH, salt concentration, amount of mag-MWCNTs, and extraction and desorption time. Response surface was employed to assist in the MSPE optimization. Under optimized conditions, excellent linearity was achieved in the range of 0.05-5.0μg/L for all six SUs, with coefficients of correlation r>0.9994, and preconcentration factors ranging from 178 to 210. Limits of detection and quantification were 0.01-0.04μg/L and 0.03-0.13μg/L, respectively. The intra-day and inter-day precision (relative standard deviations, n=6, %) at three spiked levels were 2.0-11.0% and 2.1-12.9% in terms of peak area, respectively. The method recoveries at three fortified concentrations were obtained within 76.7-106.9% for reservoir water samples and 78.2-105.4% for tap water samples. The developed MSPE-HPLC method demonstrated high sensitivity, repeatability, simplicity, rapidity, and excellent practical applicability. Copyright © 2016 Elsevier B.V. All rights reserved.

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