title: Application of liquid chromatography-electrospray ionization tandem mass spectrometry to the detection of 10 sulfonamides in honey.
abstract: Liquid chromatography (LC) in combination with tandem mass spectrometry (MS-MS) has been applied to the separation and detection of 10 different sulfonamides in honey. The methodology encompasses a simple hydrolysis of the honey sample to liberate sugar-bound sulfonamides followed by liquid-liquid extraction of the 10 analytes, filtration, and analysis by LC-MS-MS. Conditions for reversed-phase LC and electrospray ionization (ESI) MS-MS in the positive ion mode were optimized for the 10 compounds under study, monitoring two characteristic mass transitions simultaneously for each analyte. The procedure is a qualitative confirmatory method for 10 sulfonamides at the low microg/kg level in honey. Typical recoveries of the analytes in honey ranged from 44 to 73% at a fortification level of 50 microg/kg. This study also addresses the issue of matrix-induced suppression of ionization, an effect often encountered in trace residue analysis of food matrices using LC-ESI-MS-MS based methods.
authors.affiliation: ludovica.verzegnassi@rdls.nestle.com
authors.forename: L
authors.initials: L
authors.lastname: Verzegnassi
authors.forename: M C
authors.initials: MC
authors.lastname: Savoy-Perroud
authors.forename: R H
authors.initials: RH
authors.lastname: Stadler
mesh_terms: D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006722:Honey / Q000032:analysis*; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013449:Sulfonamides / Q000032:analysis*
chemical_list: D013449:Sulfonamides