Analysis of phospholipid molecular species by liquid chromatography - Atmospheric pressure chemical ionisation mass spectrometry of diacylglycerol nicotinates

Gary Dobson, Nigel Deighton

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

A method using liquid chromatography - atmospheric pressure chemical ionisation mass spectrometry was evaluated for determining the molecular species composition of phospholipids (phosphatidylcholines from soybean, egg yolk and bovine liver) after conversion to diacylglycerol nicotinate derivatives. The structures could be deduced from pseudo-molecular ions ([MH-123]+) and three pairs of monoacyl containing fragment ions. All molecular species in mixed peaks were readily identified and many minor components, earlier not encountered in the samples under investigation, were identified. Acyl chain regioisomers were readily distinguished by the ratio of the [MH-RCHCO]+ ions. Molecular species differing only in the position of the double bonds in one polyunsaturated acyl chain were separated on the basis of retention times. A half quantitative estimation of the molecular species composition of complex samples was achieved by a combination of UV detection and, for mixed peaks, the areas of [MH-123]+ ions.

Original languageEnglish (US)
Pages (from-to)1-17
Number of pages17
JournalChemistry and Physics of Lipids
Volume111
Issue number1
DOIs
StatePublished - Jul 11 2001

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Organic Chemistry
  • Cell Biology

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