Fit-for-purpose in veterinary drug residue analysis: Development and validation of an LC-MS/MS method for the screening of thirty illicit drugs in bovine urine

摘要

A selective and sensitive method for screening 31 analytes (nine corticosteroids, eight β-agonists, seven anabolic steroids, six promazines and zeranol) in bovine urine was validated according to 2002/657/EC guidelines. Upon optimization of sample treatment conditions, the extraction was performed by diethylether at pH 9, after deconjugation. Extraction yields (R%) proved higher than 70% for 19 analytes, 50