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The effectiveness of rambutan (Nephelium lappaceum L.) extract in stabilization of sunflower oil under accelerated conditions


Citation

Sia, Winne Chiaw Mei and Ismail, Amin and Mohd. Esa, Norhaizan and Akowuah, Gabriel Akyirem and Ho, Chun Wai and Yim, Hip Seng (2014) The effectiveness of rambutan (Nephelium lappaceum L.) extract in stabilization of sunflower oil under accelerated conditions. Antioxidants, 3 (2). pp. 371-386. ISSN 2076-3921

Abstract

The oxidative properties of sunflower oil supplemented with rambutan extract, (crude extract and its fractionated fraction, SF II) in comparison with synthetic antioxidant were investigated. The supplemented sunflower oils were stored under accelerated conditions for 24 days at 60 °C. For every 6-day interval, the oxidative properties of the supplemented sunflower oil were evaluated based on the following tests, namely peroxide value, p-anisidine value, Thiobarbituric Acid Reactive Substances (TBARS) assay, iodine value and free fatty acids. The total oxidation (TOTOX) values were also calculated based on the peroxide values and p-anisidine values. Rambutan extract is a potential source of antioxidant. The oxidative activities of the extracts at all concentrations were significantly (p < 0.05) higher than the control. Generally, the partially fractionated fraction was more effective than the crude extract. With a 2-year storage period at ambient temperature, the fractionated fraction of the extract, SF II at 300 ppm, was observed to work more effectively than the synthetic antioxidant, t-Tocopherol, and it possessed a protective effect comparable with butylatedhydrioxynanisole (BHA). Therefore, rambutan extract could be used as a potential alternative source of antioxidant in the oil industry or other fat-based products to delay lipid oxidation.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Medicine and Health Science
DOI Number: https://doi.org/10.3390/antiox3020371
Publisher: MDPI
Keywords: Rambutan; Oxidative stability; Peroxide value; P-anisidine value; Iodine value; TOTOX; Free fatty acid
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 19 Jan 2016 02:53
Last Modified: 19 Jan 2016 02:53
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/antiox3020371
URI: http://psasir.upm.edu.my/id/eprint/35683
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