Trace determination of five organophosphorus pesticides by using QuEChERS coupled with dispersive liquid-liquid microextraction and stacking before micellar electrokinetic chromatography

doi:10.1039/c5ay00692a

	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 Publication	Analytical Methods
ISSN	17599679 17599660
Volume	7 Issue:14 Pages:5801-5807
Abstract	A 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.
DOI	10.1039/c5ay00692a
URL	View the original
Language	英語
Fulltext Access	View Full-Text via DOI View Full-Text via Web of Science View Full-Text via Scopus
Citation statistics	Cited Times [WOS]:13 [WOS Record] [Related Records in WOS]
Document Type	Journal article
Collection	University of Macau
Affiliation	1.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.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh