Citation:
TENG Rui-Ju, WANG Huan, WANG Xue-Mei, SU Jia-Qiang, FENG Li-Juan, LU Xiao-Quan. Rapid Determination of Six Pesticides in Water Samples Using Ultrasound-assisted Dispersive Liquid-Liquid Microextraction Coupled with High Performance Liquid Chromatography[J]. Chinese Journal of Analytical Chemistry,
;2017, 45(2): 275-281.
doi:
10.11895/j.issn.0253-3820.160564
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A novel method for accurate, fast and sensitive detection of pesticides such as imidacloprid, isocarbophos, phoxim, dursban, imidacloprid, pyridaben and avermectin in environmental water samples has been developed by using ultrasound-assisted dispersive liquid-liquid microextraction (UA-DLLME) coupled with high performance liquid chromatography with ultraviolet detection (HPLC-UV). The UA-DLLME parameters such as types/volumes of extraction/dispersion solvents, ultrasonic time, ionic strength and extraction time were investigated. Under the optimized extraction conditions, the linearity for the detection of six pesticides in the concentration range of 10-600 μg/L was obtained with limits of detections (LODs) of 0.8-3.1 μg/L and relative standard deviations (RSDs) of 4.7%-11.3%. UA-DLLME method exhibited strong enrichment ability for the six pesticides, and the enrichment factor (EFs) were ranged from 58 to 187. This method had perfect linearity, precision and recovery results, and showed obvious advantages and practicality comparing the previously reported methods.
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