Abstract
Fast-atom-bombardment mass spectrometry (FABMS) is used for the semiquantitative determination of the fatty acids of complex lipids directly from intact algal cells, crude algal lipid extracts, and vegetable oils. Carboxylate ions, RCOO −, corresponding to the fatty acid moieties of the complex lipids are detected. The relative abundances of the carboxylate fatty acid ions in the FAB mass spectra agreed with the relative percentages found by gas chromatography of the fatty acid methyl esters derived from the extracted lipids. Chemical ionization/fast-atom-bombardment mass spectrometry (CI/FABMS) is discussed with respect to enhancing the molecular ions of the fatty acids and triacylglycerols from these materials. The use of FABMS requires little sample preparation, and FABMS enables rapid fatty acid screening, directly from crude biological materials.
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