期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1217, 期 32, 页码 5152-5157出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2010.06.008
关键词
Dispersive liquid-liquid microextraction; Preconcentration; Pyrethroids; River water; Liquid chromatography
资金
- National Natural Science Foundation of China [20905019]
- Natural Science Foundation of Hebei [B2010000209]
- SRF for ROCS, SEM
A simple ultrasound-assisted dispersive liquid-liquid microextraction method combined with liquid chromatography was developed for the preconcentration and determination of six pyrethroids in river water samples. The procedure was based on a ternary solvent system to formatting tiny droplets of extractant in sample solution by dissolving appropriate amounts of water-immiscible extractant (tetra-chloromethane) in watermiscible dispersive solvent (acetone). Various parameters that affected the extraction efficiency (such as type and volume of extraction and dispersive solvent, extraction time, ultrasonic time, and centrifuging time) were evaluated. Under the optimum condition, good linearity was obtained in a range of 0.00059-1.52 mg L-1 for all analytes with the correlation coefficient (r(2))>0.999. Intra-assay and inter-assay precision evaluated as the relative standard deviation (RSD) were less than 3.4 and 8.9%. The recoveries of six pyrethroids at three spiked levels were in the range of 86.2-109.3% with RSD of less than 8.7%. The enrichment factors for the six pyrethroids were ranged from 767 to 1033 folds. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据