title: MMSPE-RP-HPLC method for the simultaneous determination of methimazole and selected metabolites in fish homogenates.
abstract: A simple and rapid high-performance liquid chromatography method with ultraviolet detection was developed for the determination of the thyreostatic compound methimazole (1-methyl-2-mercaptoimidazole, MET) and metabolites 2-mercaptoimidazol (SHMET), N-methylthiourea (MTU) and N-methylhydantoin (MEH) from zebrafish (D. rerio) whole body homogenates using mixed mode solid phase extraction technique for sample pre-treatment. The highly polar compounds were separated on a difunctionally bonded silica based reverse phase column using gradient elution. Retention factors ranged between 1.53 and 5.66. The method was linear between 0.1 and 30 microg/ml, the detection limits were 0.4 ng for MET and SHMET, 0.6 ng for MTU and 2.6 ng for MEH. Extraction method was exhibited average recovery rates of 85.2-97.6%.
authors.affiliation: GSF National Research Center for Environmental and Health, Institute for Ecological Chemistry, Ingolstaedter Landstr. 1, D-85764 Neuherberg, Germany. hollosi@gsf.de
authors.forename: L
authors.initials: L
authors.lastname: Hollosi
authors.forename: A
authors.initials: A
authors.lastname: Kettrup
authors.forename: K-W
authors.initials: KW
authors.lastname: Schramm
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D008713:Methimazole / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D015027:Zebrafish / Q000378:metabolism*
chemical_list: D008713:Methimazole