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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 shu

Rapid Determination of Six Pesticides in Water Samples Using Ultrasound-assisted Dispersive Liquid-Liquid Microextraction Coupled with High Performance Liquid Chromatography

1.
College of Chemistry and Chemical Engineering, Northwest Normal University;
2.
Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province;
3.
Lanzhou Institute Technology, Lanzhou 730070, China

Received Date: 23 July 2016
Revised Date: 24 October 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21467028), the "Longyuan Young Creative Talents Support Program" of Gansu Province, China.

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.
- Dispersive liquid-liquid microextraction,
- High performance liquid chromatography,
- Pesticides,
- Water samples
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