Evaluation of Solvent-Free Microwave Extraction Conditions on Essential Oils from Allium cepa Through Chemometric Analysis

Ikram, Rabia and Low, Kah Hin and Hashim, Najihah Mohd and Ahmad, Waqas and Nasharuddin, Muhammad Nazil Afiq (2018) Evaluation of Solvent-Free Microwave Extraction Conditions on Essential Oils from Allium cepa Through Chemometric Analysis. Current Analytical Chemistry, 14 (6). pp. 646-653. ISSN 1573-4110, DOI https://doi.org/10.2174/1573411014666180619145937.

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Official URL: https://doi.org/10.2174/1573411014666180619145937


Background: The feasibility of applying methods or the extraction of Allium cepa essential oils using solvent-free microwave extraction (SFME) has been compared to hydro-distillation (HD) process. Parameters of extraction were investigated using a rational design of experiment screening. Objective: To screen the important factors that may influence the quantity and/or quality of the extracts derived from Allium cepa Method: A no. of 13 experiments were performed based on the screening process. The key parameters, such as power (350/500 W), size of the sample (chopped/sliced), quantity (500/1000 g), time of extraction (25/50 min.) and water ratio (20/50 mL) were selected based on the limitation of the instrument. The essential oils derived from Allium cepa were characterized by GC-MS analysis. Results: The commonly collected constituents via SFME and HD are 3,4-Dimethylthiophene, Disul-fide, methyl propyl, Dithiolane, 2,4-Dimethyl-5,6-dithia-2,7-nonadienal, 4,6-Diethyl-1,2,3,5-tetrathiolane, 5,7-Diethyl-1,2,3,4,6-pentathiepane (sulfur-containing compounds) and Methoxyacetic acid, cyclopentyl ester, 2-Propenoic acid, 2-methyl-, octyl ester (fatty acid esters). Conclusion: A pragmatic relationship between the variations of extraction parameters has been studied. Results suggested and verified that among the factors, Power and time of extraction influence the process of extraction significantly.

Item Type: Article
Funders: University of Malaya from [FL001D-13BIO] and [PG103-2014B]
Uncontrolled Keywords: Allium cepa; hydro-distillation; principal component analysis; solvent-free microwave extraction; essential oils; chemometric analysis
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
R Medicine
Divisions: Faculty of Medicine
Faculty of Science > Department of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 06 Aug 2019 03:08
Last Modified: 06 Aug 2019 03:08
URI: http://eprints.um.edu.my/id/eprint/21818

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