A comparative study on the chemical constituent's fatty acids and lignans from sesame seeds and flaxseeds by Gas Chromatography/Mass Spectrometry
A comparative study on the chemical constituent's fatty acids and lignans from sesame seeds and flaxseeds by Gas Chromatography/Mass Spectrometry
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Date
2023-12
Authors
Hatil Hashim EL-Kamali
Gawaher Fatihalalim El Awad
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Publisher
Napata College
Abstract
Background Sesamum indicum (sesame) and Linum usitatissimum (flaxseed) seeds are rich in
fatty acids and lignans which have been stated to be the reason for their wide range of activities.
Sesamum indicum seeds have been shown to possess cholesterol lowering activity,
neuroprotective, anti-carcinogenic and coronary protective effect and Linum usitatissimum seeds
health benefits include reducing cardiovascular diseases, decrease the risk of cancer, anti-
inflammatory activity, laxative effect, osteoporosis and alleviation of menopausal symptoms.
Experimental Sesamum indicum and Linum usitatissimum seeds were coarsely grounded for oil
extraction and for sample preparation by methyl esterification for the GC-MS instrument. Another
amount of the seeds was taken and the methanol extraction followed by n-hexane method was
carried out, then injected into the GC/MS instrument. From the results of GC/MS, the fatty acid
and lignan composition were determined and a comparison was made.
Results The major constituents in sesame seeds fixed oil were linoleic acid, methyl ester
(34.80%), oleic acid, methyl ester (30.89%), palmitic acid, methyl ester (15.41%) and methyl
stearate (13.89%).The major constituents in flaxseeds fixed oil were alpha-linolenic , methyl ester
(53.05%), linoleic acid, methyl ester (18.83%), palmitic acid, methyl ester (12.86%), methyl
stearate (11.94%).The major constituents in sesame seeds extract were linoleic methyl ester
(22.52%), vitamin E (25.18%), oleic acid, methyl ester (13.44%), and palmitic acid, methyl ester
(11.66%).The major constituents in flaxseeds extract were isobutylglycerol-nitro (13.16%), D-
sesamin (22.89%) and episesamin (40.49%).
Conclusion Both Sesamum indicum and Linum usitatissimum seeds are a rich source of fatty acids
and dietary lignans
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