UNASSIGNED: A new simple and rapid pretreatment method for simultaneous determination of 19 @entity13135 in pork samples was developed through combining the QuEChERS method with dispersive liquid-liquid microextraction followed by ultra high performance liquid chromatography with tandem mass spectrometry. The sample preparation involves extraction/partitioning with QuEChERS method followed by dispersive liquid-liquid microextraction using @entity69308 as extractive solvent and the @entity1626 extract as dispersive solvent which obtained by QuEChERS. The enriched @entity69308 organic phase by dispersive liquid-liquid microextraction was evaporated, reconstituted with 100  L @entity1626 /water (1:9 v/v) and injected into an ultra high performance liquid chromatograph with a mobile phase composed of @entity1626 and 0.1% v/v @entity5189 under gradient elution and separated using a BHE @entity6173 column. Various parameters affecting the extraction efficiency were investigated. Matrix-matched calibration curves were established. Good linear relationships were obtained for all analytes in a range of 2.0-100   g/kg and the limits of detection were 0.04-0.49   g/kg. Average recoveries at three spiking levels were in the range of 78.3-106.1% with relative standard deviations less than 12.7% (n = 6). The developed method was successfully applied to determine @entity11682 residues in pork samples. This article is protected by copyright. All rights reserved.

Determination of 19 XXXX residues in pork samples by combining QuEChERS with dispersive liquid-liquid microextraction followed by UHPLC-MS/MS.

@entity69308 :: ('MESH:C016134', 'Chemical') :: ['tetrachloroethane'] @entity11682 :: ('CHEBI:35358', 'Chemical') :: ['sulfonamide'] @entity13135 :: ('MESH:D013449', 'Chemical') :: ['sulfonamides'] @entity1626 :: ('MESH:C032159', 'Chemical') :: ['acetonitrile'] @entity6173 :: ('27241', 'Gene') :: ['C18'] @entity5189 :: ('MESH:C030544', 'Chemical') :: ['formic acid']
@entity13135 :: (MESH:D013449,Chemical) :: ['sulfonamides']
