title: Development and validation of a high performance liquid chromatography assay for 17alpha-methyltestosterone in fish feed.
abstract: 17alpha-Methyltestosterone (MT) is used to manipulate the gender of a variety of fish species. A high performance liquid chromatography (HPLC) internal standard method for the determination of 17alpha-methyltestosterone in fish feed using 3beta-methoxy-17beta-hydroxyandrost-5-en-7-one as internal standard (IS) has been developed. The method has been validated for the quantitation of MT in fish feed using 245 nm UV absorbance as the parent wavelength and 255 nm as a qualifier wavelength. The method was validated in the concentration range of 15.0-120 mg/kg of 17alpha-methyltestosterone in fish feed. Method was also found to be suitable for other feeds.
authors.affiliation: Department of Biochemistry, Institute for Enzyme Research, University of Wisconsin at Madison, 1710 University Avenue, Madison, WI 53726, USA. amarwah@wisc.edu
authors.forename: Ashok
authors.initials: A
authors.lastname: Marwah
authors.forename: Padma
authors.initials: P
authors.lastname: Marwah
authors.forename: Henry
authors.initials: H
authors.lastname: Lardy
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002415:Cats; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005399:Fishes; D008777:Methyltestosterone / Q000032:analysis* / Q000592:standards; D051381:Rats; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D008777:Methyltestosterone