Avocado oil is excellent functional oil. Effects of three extraction methods (squeezing extraction, supercritical carbon dioxide extraction, and aqueous extraction) on the species, composition, and contents of lipids in avocado oil were analyzed via ultra-performance liquid chromatography-time-of-flight tandem mass spectrometry (UPLC-TOF-MS/MS), and the differential components of lipids were revealed by OrthogonalPartialLeast Squares-DiscriminantAnalysis (OPLS-DA), S-plot combined with variable importance in the projection (VIP). The results showed that the fatty acid composition of avocado oil mainly consisted of oleic acid (36-42%), palmitic acid (25-26%), linoleic acid (14-18%), and palmitoleic acid (10-12%). A total of 134 lipids were identified first from avocado oil, including 122 glycerides and 12 phospholipids, and the total number of carbon atoms contained in the fatty acid side chains of the lipids was 32-68, and the number of double bonds was 0-9. Forty-eight differential lipid compounds with significant effects of the three extraction methods on the lipid composition of avocado oil were excavated, among which the differences in triglycerides (TG), phosphatidylethanol (PEtOH), and phosphatidylmethanol (PMeOH) contents were highly significant, which provided basic data to support the subsequent guidance of avocado oil processing, quality evaluation, and functional studies.
Keyphrases
- fatty acid
- liquid chromatography
- tandem mass spectrometry
- simultaneous determination
- mass spectrometry
- high resolution
- carbon dioxide
- multiple sclerosis
- ultra high performance liquid chromatography
- magnetic resonance imaging
- machine learning
- magnetic resonance
- computed tomography
- gas chromatography
- solid phase extraction
- high resolution mass spectrometry