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- W2359385636 abstract "A multiresidue analytical method was developed for the determination of 188 pesticides in vegetable using liquid chromatography-ion trap-time of flight tandem mass spectrometry(LC-MS-IT-TOF).The pesticide residues were extracted from samples by acetic acid-acetonitrile(1∶99,by volume).The extract was cleaned up on a solid phase extraction column with complex carbon and N-propyl ethylenediamine(Carbon GCB/PSA SPE),eluted with acetonitrile-toluene(3∶1,by volume),evaporated with a stream of nitrogen near to dryness and redissoved by methanol.The separation of pesticides was performed on a Shimadzu Shim-pack XR-ODS Ⅱ(2.0 mm i.d.×75 mm,2.2 μm)by gradient elution with a flow rate of 0.4 mL/min at 40 ℃.The detections for pesticides were carried out under positive and negative electrospray ionization modes at the same time.The linear ranges for pesticides were 5-250 μg/L except for acetamiprid,bitertanol and mevinphos of 10-250 μg/L.The correlation coefficients were larger than 0.987 and the limits of detection ranged from 0.02 μg/kg to 5.50 μg/kg.The method was validated at two fortification levels of 5,10 μg/kg in broccoli,and the mean recoveries were in the range of 18%-105% and 26%-130%,respectively,with relative standard deviations(RSDs)of 5.8%-30.1%and 2.8%-22.8%,respectively." @default.
- W2359385636 created "2016-06-24" @default.
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- W2359385636 date "2010-01-01" @default.
- W2359385636 modified "2023-09-23" @default.
- W2359385636 title "Rapid Determination of 188 Pesticide Residues in Vegetable by Liquid Chromatography-Ion Trap-Time of Flight Tandem Mass Spectrometry" @default.
- W2359385636 hasPublicationYear "2010" @default.
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