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- W2355457842 abstract "A method for the determination of 18 pesticide residues in tea by ultra-high-performance liquid chromatography-tandem mass spectrometry(UPLC-MS / MS) was developed.The samples were extracted with acetonitrile.The extract was cleaned-up with different solid phase extraction(SPE) columns-Cleanet TPT,ODS C 18,Amino and Florisil column.The separation was performed on a UPLCTM HSS T3 column.Effects of acetonitrile-water and methanol-water with different proportions as mobile phase on the ionization efficiency,resolution and sensitivity were compared.The eighteen pesticides were determined in the modes of electrospray ionization and multiple reaction monitoring.The analytes were quantified by matrix-matched internal standard method.The calibration curves showed good linearity in 2-200 μg / L for each pesticide(R 0.99).The limits of detection(LODs) were in the range of 0.03-1.5 μg / kg.The recoveries of all the pesticides varied from 70% to 109% with the relative standard deviations of 2.2% ～ 15% at the spiked levels of 10,50,100 μg / kg for all pesticides.The method has been applied to the determination of tea samples from different regions successfully with satisfactory results." @default.
- W2355457842 created "2016-06-24" @default.
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- W2355457842 date "2013-01-01" @default.
- W2355457842 modified "2023-09-25" @default.
- W2355457842 title "Determination of eighteen pesticide residues in tea by ultra-high-performance liquid chromatographytandem mass spectrometry" @default.
- W2355457842 hasPublicationYear "2013" @default.
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