PMID- 19938491 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20101005 LR - 20161018 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 27 IP - 4 DP - 2009 Jul TI - [Determination of 107 pesticide residues in vegetables using off-line dispersive solid-phase extraction and gas chromatography-tandem mass spectrometry]. PG - 391-400 AB - A screening method was developed for the determination of 107 pesticide residues in vegetables using off-line dispersive solid-phase extraction (DSPE) and gas chromatography-tandem mass spectrometry (GC-MS/MS). The pesticides interested were extracted from the samples with acetonitrile (saturated by n-hexane) containing 1% acetic acid and simultaneously separated by liquid-liquid partitioning with adding anhydrous magnesium sulfate plus sodium acetate following by a simple cleanup step known as dispersive solid-phase extraction. The extracts were determined by GC-MS/MS using external standard method. The method was reliable and stable that the recoveries of almost all pesticides were in the range from 60% to 130% at the spiked level of 10 microg/kg into four vegetable matrixes (garlic, green bean, radish 8 and spinach) and the relative standard deviations (RSDs) were all not more than 15.3%. The linearity of the method was good between 0.05 mg/L and 1 mg/L, and all limits of quantification (LOQs) less than 10 microg/kg. The method is selective with no interference, especially in the complicated garlic matrix. FAU - Shen, Weijian AU - Shen W AD - Food Laboratory of Jiangsu Entry-Exit Inspection and Quarantine Bureau, Nanjing, China. swj9722418@yahoo.com.cn FAU - Yu, Keyao AU - Yu K FAU - Gui, Qianwen AU - Gui Q FAU - Jiang, Yuan AU - Jiang Y FAU - Zhao, Zengyun AU - Zhao Z FAU - Shen, Chongyu AU - Shen C FAU - Wu, Bin AU - Wu B FAU - Chu, Xiaogang AU - Chu X LA - chi PT - English Abstract PT - Journal Article PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 EDAT- 2009/11/27 06:00 MHDA- 2009/11/27 06:01 CRDT- 2009/11/27 06:00 PHST- 2009/11/27 06:00 [entrez] PHST- 2009/11/27 06:00 [pubmed] PHST- 2009/11/27 06:01 [medline] PST - ppublish SO - Se Pu. 2009 Jul;27(4):391-400.