title: Fast liquid chromatography-quadrupole linear ion trap-mass spectrometry analysis of polyunsaturated fatty acids and eicosanoids in human plasma.
abstract: Profiling of polyunsaturated fatty acids (PUFAs) and their oxidized metabolites, mainly eicosanoids, in human plasma by fast liquid chromatography-mass spectrometry is described. Sample preparation involved protein precipitation of 200μL plasma followed by on-line solid-phase extraction. 7 PUFAs and 94 oxidized metabolites were separated utilizing a C-18 column packed with 2.6μm core-shell particles in 7min. The analytes and deuterium-labeled standards were detected via scheduled multiple reaction monitoring transitions (123 sMRM). Simultaneously, linear ion trap fragment spectra were acquired for confirmation, if necessary. The lower limit of quantitation ranged between 200 and 1000ng/mL for the PUFAs and 10-1000pg/mL for the metabolites. The method was applied to a study on plasma samples from 50 healthy subjects.
authors.affiliation: Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University Hospital Leipzig, Liebigstr. 27, 04103 Leipzig, Germany. linda.kortz@medizin.uni-leipzig.de
authors.forename: Linda
authors.initials: L
authors.lastname: Kortz
authors.forename: Juliane
authors.initials: J
authors.lastname: Dorow
authors.forename: Susen
authors.initials: S
authors.lastname: Becker
authors.forename: Joachim
authors.initials: J
authors.lastname: Thiery
authors.forename: Uta
authors.initials: U
authors.lastname: Ceglarek
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods*; D015777:Eicosanoids / Q000097:blood* / Q000737:chemistry; D005231:Fatty Acids, Unsaturated / Q000097:blood* / Q000737:chemistry; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D013058:Mass Spectrometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction
chemical_list: D015777:Eicosanoids; D005231:Fatty Acids, Unsaturated