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Anal Chem. 2007 Apr 15;79(8):3206-13. Epub 2007 Mar 17.

Analysis of lipids using 2,4,6-trihydroxyacetophenone as a matrix for MALDI mass spectrometry.

Author information

1
Institute of Chemical Technologies and Analytics, University of Technology, Getreidemarkt 9/164, A-1060 Vienna, Austria. stubiger@pop.tuwien.ac.at

Abstract

Lipids exhibit a broad range of chemical properties that make their analysis quite demanding. Today, matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) represents a versatile tool in the field of lipid analysis, also offering the possibility for molecular structural identification using novel MALDI tandem time-of-flight (TOF/TOF) instrumentation. In this study, we evaluated 2,4,6-trihydroxyacetophenone (THAP) for the analysis of various lipid classes including neutral storage lipids (triacylglycerols), polar membrane lipids (glycerophospho- and sphingolipids), and glycosphingolipids. THAP proved to be a versatile matrix for the routine analysis of various lipids from biological samples ("lipidomics"). A sample preparation methodology was established using selective alkali salt doping for subsequent MS/MS experiments. Sodiated and lithiated molecules provided superior structural information on lipids (i.e., acyl group identification); thus, following this approach, both selective peak detection with high sensitivity and more reliable structural information were obtained simultaneously.

PMID:
17367115
DOI:
10.1021/ac062236c
[Indexed for MEDLINE]

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