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Magnetic solid-phase extraction of heterocyclic pesticides in environmental water samples using metal-organic frameworks coupled to high performance liquid chromatography determination.

Authors
  • Ma, Jiping1
  • Wu, Gege2
  • Li, Shuang2
  • Tan, Weiqiang2
  • Wang, Xiaoyan3
  • Li, Jinhua4
  • Chen, Lingxin5
  • 1 School of Environmental & Municipal Engineering, State-Local Joint Engineering Research Center of Urban Sewage Treatment and Resource Recovery, Qingdao University of Technology, Qingdao 266033, China. Electronic address: [email protected] , (China)
  • 2 School of Environmental & Municipal Engineering, State-Local Joint Engineering Research Center of Urban Sewage Treatment and Resource Recovery, Qingdao University of Technology, Qingdao 266033, China. , (China)
  • 3 Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; School of Pharmacy, Binzhou Medical University, Yantai 264003, China. , (China)
  • 4 Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. , (China)
  • 5 Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Centre for Coastal Environmental Engineering and Technology, 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
Jun 08, 2018
Volume
1553
Pages
57–66
Identifiers
DOI: 10.1016/j.chroma.2018.04.034
PMID: 29685336
Source
Medline
Keywords
License
Unknown

Abstract

A simple method of magnetic solid-phase extraction (MSPE) coupled to high performance liquid chromatography (HPLC) was developed for the simultaneous extraction and determination of four kinds of heterocyclic pesticides (carbendazim, triadimefon, chlorfenapyr and fenpyroximate) in environmental water samples. Magnetic metal-organic frameworks (MOFs) of type MOF-5 were prepared and used as adsorbents of MSPE. Several main parameters influencing MSPE efficiency were investigated, including amount of magnetic MOF-5, sample solution pH, extraction time, salt concentration, type and volume of desorption solvents and desorption time. Under optimal conditions, the MSPE-HPLC method presented fast simple separation and analysis, and excellent linearity in the range of 0.3-500.0 μg/L for carbendazim and triadimefon, and 0.1-500.0 μg/L for chlorfenapyr and fenpyroximate, with correlation coefficients (r) higher than 0.9992. High sensitivity with limits of detection and quantification ranging from 0.04-0.11 μg/L and 0.13-0.35 μg/L, respectively, were achieved, as well as good precision with relative standard deviations of 2.98-7.11% (intra-day) and 3.31-7.12% (inter-day). Furthermore, the method was successfully applied to reservoir and Yellow River water samples, and satisfactory recoveries at three spiked concentration levels were between 80.20% and 108.33%.The magnetic MOF-5 composites based MSPE followed by HPLC proved promising for convenient and efficient determination of heterocyclic pesticides in environmental water samples.

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