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

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.

journal_name

Chem Phys Lipids

journal_title

Chemistry and physics of lipids

authors

Dobson G,Deighton N

doi

10.1016/s0009-3084(01)00130-x

subject

Has Abstract

pub_date

2001-05-01 00:00:00

pages

1-17

issue

1

eissn

0009-3084

issn

1873-2941

pii

S0009-3084(01)00130-X

journal_volume

111

pub_type

杂志文章

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