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A quantitative multi-residue LC- and GC-MS-MS based assay was validated for the analysis of endogenous androgens, progestagens and oestrogens in bovine urine. The method is targeted at analytes indicative of the abuse of nandrolone, boldenone, testosterone, progesterone and oestradiol in cattle. Using a single aliquot of urine, androgens and progestagens are extracted for analysis by GC-MS-MS on a...
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