Comparison of different extraction methods for the lipids profile determination in quinoa seeds

Authors

DOI:

https://doi.org/10.26461/17.08

Keywords:

quinoa, GC-MS, GC-FID, Soxhlet, dynamic maceration, ultrasonic assisted maceration

Abstract

In this work, three different methods for the extraction of lipids were compared in quinoa seeds: dynamic maceration with hexane, maceration with hexane assisted by ultrasound and continuous extraction in Soxhlet using an increasing polarity gradient of solvents (hexane, ethyl acetate and methanol). Method performance was evaluated thorough lipid extraction yield and the extracts were subjected to derivatization to generate the corresponding fatty acids methyl esters (FAMEs). All the obtained fractions (the extracts and FAMEs) were analyzed by thin layer chromatography, showing that the extraction methods using hexane as solvent presented spots of similar intensity and retention factor, while the extracts obtained with ethyl acetate and methanol showed spots with different retention factor. The different fractions of FAMEs were analyzed by gas chromatography using flame ionization detector and mass spectrometry, and nuclear magnetic resonance. Using GC-FID the following fatty acids were identified; C14: 0, C16: 0, C18: 0, C18: 1, C18: 2; C18: 3 and C20: 1. The analysis by GC-MS allowed the confirmation of C16: 0; C18: 0; C18: 1; C18: 2.

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Published

2018-12-19

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Articles

How to Cite

Comparison of different extraction methods for the lipids profile determination in quinoa seeds. (2018). INNOTEC, 17 ene-jun, 78-87. https://doi.org/10.26461/17.08

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