UM
Trace determination of five organophosphorus pesticides by using QuEChERS coupled with dispersive liquid-liquid microextraction and stacking before micellar electrokinetic chromatography
Wei J.2; Cao J.2; Tian K.1; Hu Y.2; Su H.2; Wan J.2; Li P.2
2015
Source PublicationAnalytical Methods
ISSN17599679 17599660
Volume7Issue:14Pages:5801-5807
AbstractA procedure involving QuEChERS sample extraction combined with dispersive liquid-liquid microextraction (DLLME) and stacking as off-line and on-line preconcentration techniques followed by micellar electrokinetic chromatography (MEKC) has been developed for the determination of five organophosphorus pesticides (dimethoate, phosphamidon, paraoxon-methyl, paraoxon and fensulfothion). The important parameters that influence the stacking and DLLME efficiency were evaluated. The RSDs of the migration time ranged from 0.06% to 1.03% and the peak area ranged from 1.12% to 5.15% for the five analytes, indicating the good repeatability of the method. The method was extensively validated by evaluating the linearity (r2 ≥ 0.9956), LODs (0.010-0.018 μg mL-1) and recovery (78.75-118.15%). The QuEChERS-DLLME-stacking-MEKC method has been successfully applied to assay the five organophosphorus pesticides in Astragalus membranaceus. Under the optimized conditions, the proposed method provided a 90.0- to 167.3-fold enrichment of the five pesticides compared with the normal MEKC method, which offers an ideal solution for the determination of some trace pesticides in real samples with complex matrices.
DOI10.1039/c5ay00692a
URLView the original
Language英語
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Cited Times [WOS]:13   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Northwestern University
2.Universidade de Macau
Recommended Citation
GB/T 7714
Wei J.,Cao J.,Tian K.,et al. Trace determination of five organophosphorus pesticides by using QuEChERS coupled with dispersive liquid-liquid microextraction and stacking before micellar electrokinetic chromatography[J]. Analytical Methods,2015,7(14):5801-5807.
APA Wei J..,Cao J..,Tian K..,Hu Y..,Su H..,...&Li P..(2015).Trace determination of five organophosphorus pesticides by using QuEChERS coupled with dispersive liquid-liquid microextraction and stacking before micellar electrokinetic chromatography.Analytical Methods,7(14),5801-5807.
MLA Wei J.,et al."Trace determination of five organophosphorus pesticides by using QuEChERS coupled with dispersive liquid-liquid microextraction and stacking before micellar electrokinetic chromatography".Analytical Methods 7.14(2015):5801-5807.
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