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Development of dispersive liquid-liquid microextraction method for the analysis of organophosphorus pesticides in tea.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2009 Sep 30; Vol. 169 (1-3), pp. 907-11. Date of Electronic Publication: 2009 Apr 16. - Publication Year :
- 2009
-
Abstract
- In this article, a new method for the determination of organophosphorus pesticides (OPPs) in tea was developed by using dispersive liquid-liquid microextraction (DLLME) and gas chromatography-flame photometric detection (GC-FPD). A mixture of acetonitrile and n-hexane was used as an extraction solvent for the extraction of OPPs from tea samples. When the extraction process was finished, the mixture of solvents was rapidly dispersed in water; target analyte was extracted to a small volume of n-hexane, using DLLME. Recovery tests were performed for concentration 5.0 microg/kg. The recovery for each target analyte was in the range between 83.3 and 117.4%. The repeatability of the proposed method, expressed as relative standard deviation, varied between 3 and 7.8% (n=3). The detection limit of the method for tea was found ranging from 0.030 to 1 microg/kg for all the target pesticides. Compared with the conventional sample preparation method, the proposed method has the advantage of being quick and easy to operate, and has high-enrichment factors and low consumption of organic solvent.
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 169
- Issue :
- 1-3
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 19467774
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2009.04.030