title: Determination of seven prostanoids in 1 ml of urine by gas chromatography-negative ion chemical ionization triple stage quadrupole mass spectrometry.
abstract: In an isotope dilution assay, prostaglandin (PG) E2, 6-keto-PGF1 alpha, thromboxane (Tx) B2 and their metabolites PGE-M (11 alpha-hydroxy-9,15-dioxo-2,3,4,5,20-pentanor-19-carboxyprostano ic acid), 2,3-dinor-6-keto-PGF1 alpha, 2,3-dinor-TxB2 and 11-dehydro-TxB2 were determined in urine by gas chromatography-triple stage quadrupole mass spectrometry (GC-MS-MS). After addition of deuterated internal standards, the prostaglandins were derivatized to their methoximes and extracted with ethyl acetate-hexane. The sample was further derivatized to the pentafluorobenzylesters and purified by thin-layer chromatography (TLC). Three zones were scraped from the TLC plate. The prostanoid derivatives were converted to their trimethylsilyl ethers and the products were quantified by GC-MS-MS. In each run, two or three prostanoids were determined.
authors.affiliation: Children's Hospital, Philipps University Marburg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Schweer
authors.forename: B
authors.initials: B
authors.lastname: Watzer
authors.forename: H W
authors.initials: HW
authors.lastname: Seyberth
mesh_terms: D015121:6-Ketoprostaglandin F1 alpha / Q000031:analogs & derivatives / Q000652:urine; D002855:Chromatography, Thin Layer; D015232:Dinoprostone / Q000652:urine; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D011453:Prostaglandins / Q000652:urine*; D013929:Thromboxane B2 / Q000031:analogs & derivatives / Q000652:urine
chemical_list: D011453:Prostaglandins; D013929:Thromboxane B2; D015121:6-Ketoprostaglandin F1 alpha; C028965:2,3-dinor-thromboxane B2; C028290:2,3-dinor-6-ketoprostaglandin F1alpha; C049235:11-dehydro-thromboxane B2; C060526:7-hydroxy-5,11-dioxotetranorprostane-1,16-dioic acid; D015232:Dinoprostone