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Dispersive liquid-phase microextraction in combination with high performance liquid chromatography for enrichment and rapid determination of benzoylurea pesticides in environmental water samples.
MedLine Citation:
PMID:  23630192     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Benzoylurea insecticides are a kind of important pesticides and have contributed great to the output of crops. Their residue in environment put serious threats on the human health and environmental safety. Present study established a new, rapid and reliable method for the monitoring of typical benzoylurea insecticides such as diflubenzuron, flufenoxuron, triflumuron, and chlorfluazuron with dispersive liquid-liquid microextraction prior to high performance liquid chromatography. Chlorobenzene and ethanol were employed as the extraction solvent and disperser solvent, respectively. The possible parameters which would influence the extraction efficiency such as the kinds and volumes of extraction and disperser solvents, extraction time, sample pH, centrifuging time, and salting-out effect were optimized in detail. Under the optimal conditions, the linear range of proposed method was in the range of 1.0 - 70 μg L(-1) . The detection limits varied from 0.24 μg L(-1) to 0.82 μg L(-1) and the precision of the method was below 6.5% (RSD, n = 6). The proposed method was validated with real water samples and satisfied spiked recoveries were achieved. All these results indicated that the proposed method was a low cost, easy to operate, efficient and sensitive method for the analysis of benzoylurea insecticides in water samples. This article is protected by copyright. All rights reserved.
Authors:
Qingxiang Zhou; Guoqing Wang; Guohong Xie
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-30
Journal Detail:
Title:  Journal of separation science     Volume:  -     ISSN:  1615-9314     ISO Abbreviation:  J Sep Sci     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088554     Medline TA:  J Sep Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
Affiliation:
Beijing Key Laboratory of Oil and Gas pollution Control, College of Geosciences, China University of Petroleum, Beijing Campus(CUP), Beijing, 102249, China.
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