Journal
JOURNAL OF SEPARATION SCIENCE
Volume 34, Issue 22, Pages 3178-3185Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201100577
Keywords
Dispersive liquid-liquid microextraction; Insecticides; In situ halide exchange reaction; Ionic liquid
Categories
Funding
- Natural Science Foundation of P. R. China [20977112]
- Program for New Century Excellent Talents in University
Ask authors/readers for more resources
A dispersive liquidliquid microextraction (DLLME) method using in situ halide exchange reaction to form ionic liquid (IL) extraction phase was developed to determine four insecticides (i.e. methoxyfenozide, tetrachlorvinphos, thiamethoxam, and diafenthiuron) in water samples. The preconcentration procedure, followed by high-performance liquid chromatography and variable wavelength detectors (VWD), enabled the formation of the immiscible IL extraction phase; the insecticides were transferred into the IL phase simultaneously, which enhanced the efficiency and sufficiency, greatly shortening the operation time. The experimental parameters affecting the extraction efficiency including volume of extraction IL, extraction and centrifugation times, volume of the sample solution and exchanging reagent, and addition of organic solvent and salt were investigated and optimized. Under optimized conditions, the extractions yielded recoveries of the target analytes from 82 to 102%. The calibration curves were linear, and the correlation coefficient ranged from 0.9990 to 0.9999 under the concentration levels of 5200 mu g/L. The relative standard deviation (n=6) was 2.94.6%. The limits of detection (LODs) for the four insecticides were between 0.98 and 2.54 mu g/L.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available