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Optimization studies and compositional analysis of subcritical water extraction of essential oil from Citrus hystrix DC. leaves


Citation

Abdul Halim, Noor Amirah and Zainal Abidin, Zurina and Siajam, Shamsul Izhar and Chong, Gun Hean and Harun, Mohd Razif (2021) Optimization studies and compositional analysis of subcritical water extraction of essential oil from Citrus hystrix DC. leaves. The Journal of Supercritical Fluids, 178. art. no. 105384. pp. 1-16. ISSN 0896-8446

Abstract

Subcritical water extraction (SWE) of essential oil (EO) from Citrus hystrix DC. leaves was optimized using response surface methodology (RSM), involving factors of particle size (0.5–1) mm, sample-to-solvent ratio (0.025–0.175) g/mL, extraction temperature (140− 180) ◦C, and extraction time (20− 40) minutes. Thus, an optimal EO yield of (2.14 ± 0.03) % (w/w) was obtained at 0.75 mm, 0.025 g/mL, 174 ◦C, and 29 min. SWE was found to yield significantly higher EO than the conventional hydrodistillation, within a shorter time. The regression model was established, presenting a significant quadratic correlation (R2 = 0.97) and adequate for predictions. SWE at 160 ◦C and 180 ◦C yielded 36 compounds, with isopulegol-dominant, exceeding SWE at 140 ◦C (21 compounds) and hydrodistillation (25 compounds). SWE with tunable temperatures not only improved the quantity of EO but was also capable of enhancing the quality because more EO compounds were extracted, offering diverse functionalities to nutraceutical sectors.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Faculty of Food Science and Technology
DOI Number: https://doi.org/10.1016/j.supflu.2021.105384
Publisher: Elsevier BV
Keywords: Kaffir lime; Subcritical water extraction; Isopulegol; Citronellal; GC-MS analysis; RSM
Depositing User: Ms. Nur Faseha Mohd Kadim
Date Deposited: 07 Feb 2023 03:50
Last Modified: 07 Feb 2023 03:50
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.supflu.2021.105384
URI: http://psasir.upm.edu.my/id/eprint/94465
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