title: Determination of zeranol/zearalenone and their metabolites in edible animal tissue by liquid chromatography with electrochemical detection and confirmation by gas chromatography/mass spectrometry.
abstract: A sensitive method is described for the determination and confirmation of zeranol and zearalenone, as well as their isomers and metabolites, in edible animal tissue. The analytes are extracted from tissue with methanol, hydrolyzed enzymatically, cleaned up by acid-base partitioning, determined by liquid chromatography (LC) with electrochemical (EC) detection, and confirmed by gas chromatography/mass spectrometry (GC/MS). LC analysis is performed by isocratic elution with a buffered mobile phase using a Nova-Pak reverse-phase C18 column with amperometric EC detection at +0.90 V. Capillary GC/MS analysis of the trimethylsilyl derivatives provides mass spectral confirmations.
authors.affiliation: Food and Drug Administration, Animal Drug Research Center, Denver Federal Center, CO 80225-0087.
authors.forename: J E
authors.initials: JE
authors.lastname: Roybal
authors.forename: R K
authors.initials: RK
authors.lastname: Munns
authors.forename: W J
authors.initials: WJ
authors.lastname: Morris
authors.forename: J A
authors.initials: JA
authors.lastname: Hurlbut
authors.forename: W
authors.initials: W
authors.lastname: Shimoda
mesh_terms: D000818:Animals; D002417:Cattle; D002645:Chickens; D002853:Chromatography, Liquid; D004563:Electrochemistry; D008401:Gas Chromatography-Mass Spectrometry; D006868:Hydrolysis; D007202:Indicators and Reagents; D008099:Liver / Q000032:analysis; D008460:Meat / Q000032:analysis*; D009132:Muscles / Q000032:analysis; D012118:Resorcinols / Q000032:analysis*; D014297:Trimethylsilyl Compounds / Q000032:analysis; D015025:Zearalenone / Q000032:analysis*; D015029:Zeranol / Q000032:analysis*
chemical_list: D007202:Indicators and Reagents; D012118:Resorcinols; D014297:Trimethylsilyl Compounds; D015025:Zearalenone; D015029:Zeranol