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A rapid and simple method for quantitation of metformin (MET) in human plasma by HPLC-MS/MS was developed and validated. The sample preparation consists of plasma deproteinization using acetonitrile.(More)
A method and evaluated for screening and confirmation of diethylstilbestrol (DES), alpha- and beta-zearalanol in bovine urine was developed. The residues were extracted from urine by C18 cartridges(More)
Two extraction/clean-up analytical procedures were investigated and compared regarding their recovery and matrix-purification efficiency for screening beta2-agonist residues in fortified bovine urine(More)
A simple and rapid procedure for extraction of oxymetholone in human plasma using gas chromatography coupled with quadrupole mass spectrometric was evaluated. The method involves analyte extraction(More)
Tetrahydrogestrinone, gestrinone and trenbolone are synthetic 19-norsteroids with androgenic properties sharing a labile conjugated ketotrienyl motif. Their LC-MS analyses tend to overcome classical(More)
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