Citation: MENG Liang, ZHU Binling, ZHENG Kefang, ZHANG Wenwen, MENG Pinjia. Ultrasound-assisted low-density solvent dispersive liquid- liquid microextraction for the determination of eight drugs in biological samples by gas chromatography- triple quadrupole mass spectrometry[J]. Chinese Journal of Chromatography, ;2015, 33(3): 304-308. doi: 10.3724/SP.J.1123.2014.12001 shu

Ultrasound-assisted low-density solvent dispersive liquid- liquid microextraction for the determination of eight drugs in biological samples by gas chromatography- triple quadrupole mass spectrometry

1.
1. Department of Forensic Science, Fujian Police College, Fuzhou 350007, China;

Corresponding author: MENG Liang,
Received Date: 1 December 2014
Available Online: 4 January 2015
Fund Project: 福建省教育厅中青年教师教育科研项目(JA14336). (JA14336)

A novel microextraction technique based on ultrasound-assisted low-density solvent dispersive liquid-liquid microextraction (UA-LDS-DLLME) has been developed for the determination of multiple drugs of abuse in biological samples by gas chromatography-triple quadrupole mass spectrometry (GC-QQQ-MS). A total of 100 μL of toluene as extraction solvent was dropped into the sample solution. Then the mixture was sonicated drastically in an ultrasonic bath for 3 min with occasional manual shaking to form a cloudy suspension. After centrifugation at 10000 r/min for 3 min, the upper layer of low-density extractant was withdrawn and injected into the GC-QQQ-MS for analysis. The parameters affecting extraction efficiency have been investigated and optimized. Under the optimum conditions, good linearities were observed for all analytes with the correlation coefficients ranging from 0.9984 to 0.9994. The recoveries of 79.3%-100.3% with RSDs<5.7% were obtained. The LODs (S/N=3) were in the range from 0.05 to 0.40 μg/L. UA-LDS-DLLME technique has the advantages of less extraction time, suitable for batches of sample pretreatment simultaneously, and higher extraction efficiency. It was successfully applied to the analysis of amphetamines in real human urine samples.
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