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A sensitive analytical method has been developed and validated for simultaneous determination of 16 glucocorticoid (fluorometholone, flumethasone, triamcinolone, aldosterone, clobetasol propionate, methylprednisolone, fluocinolone acetonide, hydrocortisone, prednisone, dexamethasone, beclomethasone, prednisolone, budesonide, triamcinolone acetonide, fludrocortisone acetate, and cortisone) residues in pig tissues (muscle, liver, and kidney). These biosamples were hydrolyzed with -glucuronidase/arylsulfatase enzyme and passed through a Supelclean ENVI-Carb graphitized carbon black solid-phase extraction cartridge, followed by further purification using aminopropyl cartridges. Analytes were separated on an ultra-performance liquid chromatography BEH C18 column followed by tandem mass spectrometry (MS) with an electrospray ion source. The MS data acquisition was performed in the negative multireaction monitoring mode by a time-scheduled multireaction monitoring program. The assay for the 16 glucocorticoids were linear over the range of 1250 g/L for pork, liver, and kidney, with correlation coefficient &amp;gt;0.99. Estimated detection limits for the target analytes ranged from 0.03 to 0.30 g/kg, and limits of quantitation ranged from 0.10 to 1.00 g/kg. Recoveries of the glucocorticoids (spiked at levels of 0.4 and 2.0 g/kg) ranged from 81.0 to 112.3, with relative standard deviations between 2.6 and 16.6.

journal of aoac international

Validation of a Solid-Phase Extraction and Ultra-Performance Liquid Chromatographic Tandem Mass Spectrometric Method for the Detection of 16 Glucocorticoids in Pig Tissues