title: Specific and sensitive quantitation of medroxyprogesterone acetate in human serum by gas chromatography-mass spectrometry.
abstract: A procedure for the quantitation of medroxyprogesterone acetate in serum using gas chromatography-quadrupole mass spectrometry is described. Medroxyprogesterone propionate, synthesized from medroxyprogesterone, was used as the internal standard. The serum samples were extracted on Bond Elut C18 cartridges, and the acetate and propionate were determined as their 3-enol heptafluorobutyrate esters by selected-ion monitoring technique. The linear range of the standard curve in serum was 0.5-30 ng/ml with a lower limit of quantitation of 0.5 ng/ml. The coefficient of variation of the method was 3.1% at 10 ng/ml and 5.5% at 1 ng/ml. The method is very rapid, and it has been applied for routine measurements of medroxyprogesterone acetate levels in human serum after oral administration of 10 or 20 mg.
authors.affiliation: Department of Pharmaceutical Chemistry, University of Kuopio, Finland.
authors.forename: T
authors.initials: T
authors.lastname: Järvinen
authors.forename: T
authors.initials: T
authors.lastname: Keinonen
authors.forename: S
authors.initials: S
authors.lastname: Auriola
authors.forename: P
authors.initials: P
authors.lastname: Peura
authors.forename: E
authors.initials: E
authors.lastname: Hirvonen
authors.forename: E
authors.initials: E
authors.lastname: Palva
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008525:Medroxyprogesterone / Q000031:analogs & derivatives* / Q000097:blood; D017258:Medroxyprogesterone Acetate
chemical_list: D017258:Medroxyprogesterone Acetate; D008525:Medroxyprogesterone