Abstract
ABSTRACTTriacylglycerols play an important role in nutrition and cosmetics, but are also of significance in a number of diseases. Because of their commercial importance, there are different established analytical techniques of composition analysis. Most of these methods are, however, relatively time‐consuming. In this study we used a matrix‐assisted laser desorption and ionization time‐of‐flight (MALDI‐TOF) mass spectrometry (MS) for characterization of different vegetable oils. Products with acidic ‐OH groups (derived from triacylglycerols) were additionally detected by 31P NMR after derivatization with chlorophosphane. The combination of these two methods is very advantageous. Whereas MALDI‐TOF provides very fast and reliable information on the fatty acid composition of lipid samples by detection of the corresponding triacylglycerol molecular ions, the detection of monoacylglycerols and especially free fatty acids is difficult. In contrast, such compounds can be easily detected by 31P NMR spectroscopy, but with a lower sensitivity. Due to the rapid performance, high sensitivity and the quantification of spectra, the combination of both methods provides a promising new tool in lipid analysis.
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