Abstract
In the present work, a high-performance liquid chromatographic method coupled with mass spectrometry (HILIC-HPLC /ESI-MS) was used for the characterization and the quantification of glycerophospholipids (GPLs) classes and their molecular species in three genetically different Tunisian apricot cultivars (bitter, sweet and semi-sweet apricots). The application of the proposed method to the analysis of apricot oil allowed to separate and identify 74 molecular species of GPLs. Phosphatidylcholine (PC) class was found to be the most abundant GLPs in the three seed oils (38.6-62.4%) especially in bitter apricot, followed by phosphatidylinositol (PI) and phosphatidylethanolamine (PE) classes with values of 8.3-38.9% and 1.7-25.4% respectively. Phosphatidic acid (PA), phosphatidylglycerol (PG) and lysophosphatidylcholine (LPC) compounds were minor ones with maximums of 11.3%, 9.8% and 9.2% respectively. The results we obtained for the three Tunisian apricot seed varieties clearly indicate that the phospholipids of Tunisian apricot are of great interest. In fact, the high content of phosphatidylcholine (PC) determines it as a suitable and valuable source for obtaining corresponding phospholipids concentrates.
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