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Simultaneous analysis of glucocorticoids in bovine muscle and liver by LC-MS/MS
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2010, v.23 no.4, pp.405-413
https://doi.org/10.5806/AST.2010.23.4.405
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(2010). Simultaneous analysis of glucocorticoids in bovine muscle and liver by LC-MS/MS. Analytical Science and Technology, 23(4), 405-413, https://doi.org/10.5806/AST.2010.23.4.405
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Abstract
A new method for the simultaneous determination of six glucocorticoids (betamethasone, dexamethasone,prednisone, prednisolone, methylprednisolone, and flumethasone) in meats (bovine muscle, bovine liver) were established. Samples were effectively extracted using C18 cartridge with ethylacetate. Chromatographic separation was achieved using C18 column and negative electrospray ionization mass spectrometry was performed in the Multiple Reaction Monitoring mode for the effective quantitation and qualification of glucocorticoids. Acetonitrile and water (0.1% formic acid) were used as mobile phase and additive for effective electrospray ionization, and gave good chromatographic separation and mass spectrometric sensitivity. The limit of detection (LODs) and the limit of quantitation (LOQs) in spiked blank samples depending on types of matrix and pharmaceuticals were ranged from 0.2 to 1.0 μg/kg and 0.8 to 3.4 μg/kg, respectively. And the recoveries were between 89.5 to 119.6%. The established method showed good recoveries, accuracies, precisions and fast sample preparation and it will be applied to assay of glucocorticoids residues in meat.
- keywords
- glucocorticoids, meat, LC-MS/MS, residual analysis
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