FTIR spectroscopy combined with chemometric for analysis of sesame oil adulterated with corn oil

Ahmad Fadzillah, Nurrulhidayah and Che Man, Yakoob and Rohman, Abdul (2014) FTIR spectroscopy combined with chemometric for analysis of sesame oil adulterated with corn oil. International Journal of Food Properties, 17 (6). pp. 1275-1282. ISSN 1094-2912 E-ISSN 1532-2386

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Abstract

Sesame oil is an edible vegetable oil derived from the sesame seed that has been used as a flavor enhancer in Southeast Asian cuisine. This highly valuable oil can be subjected to adulterations with lower price oils in order to gain economical profit. Among 10 vegetable oils evaluated using fatty acid profiles with principal component analysis, corn oil has the closest similarity in fatty acids combined together with sesame oil; therefore, corn oil is a potential adulterant in sesame oil. FTIR spectra at 1072−935 cm−1 was chosen for quantitative analysis with acceptable values of coefficient determination (R2), root mean square errors of calibration and prediction. These combined methods using first derivative FTIR spectra in partial least square showed well quantified corn oil in sesame oil with R2 (0.992), root mean square errors of calibration (0.53% v/v) and root mean square errors of prediction (1.31% v/v) values. Moreover, the Coomans plot based on Mahalanobis distance were able to discriminate between sesame oil with adulterated oils such as corn oil, grape seed oil, and rice bran oil.

Item Type:	Article (Journal)
Additional Information:	7619/71285
Uncontrolled Keywords:	Adulteration, Chemometric analysis, FTIR spectroscopy, Sesame oil, Corn oil.
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	International Institute for Halal Research and Training (INHART)
Depositing User:	Dr Nurrulhidayah Ahmad Fadzillah
Date Deposited:	18 Feb 2020 10:12
Last Modified:	11 Aug 2020 11:02
URI:	http://irep.iium.edu.my/id/eprint/71285

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