Laser desorption/ionization time‐of‐flight mass spectrometry of triacylglycerols in oils

作者：Cosima Damiana Calvano, Francesco Palmisano, Carlo Giorgio Zambonin · 发表于：Rapid Communications in Mass Spectrometry · 年份：2005 · DOI：10.1002/rcm.1933 · 被引用次数：57 · 研究领域：Mass Spectrometry Techniques and Applications、Analytical Chemistry and Chromatography、Petroleum Processing and Analysis

Selected triacylglycerols (TAGs) were directly analyzed on a standard stainless steel target plate by laser desorption/ionization time-of-flight mass spectrometry (LDI-TOFMS). Sodium and potassium ion adducts of TAGs were produced, and the thermal desorption/ionization mechanism was invoked to rationalize the experimental observations. The method permits a simple and fast qualitative analysis of TAGs. Advantages of this approach relative to matrix-assisted laser desorption/ionization (MALDI) are simpler sample preparation, lack of need to use a matrix with consequent absence of matrix interference peaks in the spectra, and potential improvements in shot-to-shot reproducibility due to the absence of the crystallization step resulting in a more homogenously deposited sample. The procedure was successfully applied to the determination of TAGs in whole oils, yielding very fast TAG fingerprints.