Vortex-assisted matrix solid–liquid dispersive microextraction for the analysis of triazole fungicides in cotton seed and honeysuckle by gas chromatography
•VA-MSLDME was developed for analyzing 7 fungicides in one step within 6min.•VA-MSLDME consists of two solid and three liquid phases in a single system.•The performance of VA-MSLDME was evaluated in cotton seed and honeysuckle.•The method could be extended to other analytes in a wide range of matric...
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Veröffentlicht in: | Food chemistry 2016-04, Vol.196, p.867-876 |
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Sprache: | eng |
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Zusammenfassung: | •VA-MSLDME was developed for analyzing 7 fungicides in one step within 6min.•VA-MSLDME consists of two solid and three liquid phases in a single system.•The performance of VA-MSLDME was evaluated in cotton seed and honeysuckle.•The method could be extended to other analytes in a wide range of matrices.
A one-step analytical method termed vortex-assisted matrix solid–liquid dispersive microextraction (VA-MSLDME) was developed for the determination of seven triazole fungicides from cotton seed and honeysuckle prior to gas chromatography with electron capture detection. The VA-MSLDME was performed by mixing the matrix, primary secondary amine, acetonitrile, toluene, and water in one single system. The target fungicides in the sample were extracted, cleaned up and preconcentrated simultaneously in the matrix/acetonitrile/water/toluene system. Meanwhile, the interferences were adsorbed by the cleanup adsorbent. The extraction recoveries of the fungicides from the samples varied from 82.9% to 97.8% with relative standard deviations of 4.4–8.5%. The enrichment factors of the analytes ranged from 22 to 47, and the limits of detection were in the range of 0.05–20μg/kg. The results demonstrated the significant predominance of VA-MSLDME in the analysis of pesticide residues in cotton seed and honeysuckle samples. |
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ISSN: | 0308-8146 1873-7072 |
DOI: | 10.1016/j.foodchem.2015.09.093 |