title: Analysis of phospholipid species in rat peritoneal surface layer by liquid chromatography/electrospray ionization ion-trap mass spectrometry.
abstract: The main phospholipids in rat peritoneal surface layer were analyzed by normal-phase high-performance liquid chromatography (HPLC) coupled with electrospray ionization (ESI) ion-trap mass spectrometry (MS). By using a silica gel column and a gradient of hexane/isopropanol/water as mobile phase containing 5 mmol/L ammonium formate as modifiers, a baseline separation of glycerophosphoehtanolamine (PE), phosphatidylinositol (PI), phosphatidylserine (PS), phosphatidylcholine (PC), sphingomyelin (SM) and lyso-phosphatidylcholine (LPC) was obtained and more than 90 phospholipid constituents in rat peritoneal surface were identified and determined by on-line ion-trap MS detection. The major ethanolamine glycerophospholipids in rat peritoneal surfaces were plasmalogens that were highly enriched in polyunsaturated fatty acids at the sn-2 position. In addition, the fragmentation patterns for each phospholipid class by the ion-trap MS were discussed.
authors.affiliation: Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Gao
authors.forename: Xinkui
authors.initials: X
authors.lastname: Tian
authors.forename: Dawei
authors.initials: D
authors.lastname: Wen
authors.forename: Jie
authors.initials: J
authors.lastname: Liao
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Huwei
authors.initials: H
authors.lastname: Liu
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D005231:Fatty Acids, Unsaturated; D010537:Peritoneum / Q000378:metabolism*; D010743:Phospholipids / Q000032:analysis* / Q000378:metabolism; D010955:Plasmalogens / Q000032:analysis / Q000302:isolation & purification; D051381:Rats; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D005231:Fatty Acids, Unsaturated; D010743:Phospholipids; D010955:Plasmalogens