Rapid quantification of free fatty acids in virgin coconut oil by FTIR spectroscopy

Marina, A. M. and Wan Rosli, W. I. and Norhidayah, M. (2015) Rapid quantification of free fatty acids in virgin coconut oil by FTIR spectroscopy. Malaysian Applied Biology, 44 (2). pp. 45-49. ISSN 0126-8643

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Abstract

A rapid method for quantitative analysis of free fatty acids in virgin coconut oil (VCO) was determined using Fourier transform infrared (FTIR) spectroscopy. Thirty training samples of VCO were prepared by spiking lauric acid to VCO samples covering a range of 0.1% to 5% of free fatty acids. FTIR spectra between 1730 and 1690 cm-1 was used for quantitative determination of free fatty acids. A partial least square (PLS) model was calibrated to predict the free fatty acids content of VCO. A linear calibration curve was obtained for the actual value against FTIR predicted value which yields an equation of y = 0.9744x +0.0006 and satisfactory results of root mean square error of prediction (RMSEP) of 0.1264 and correlation coefficient (R2) of 0.9281. Thus, FTIR spectroscopy with PLS regression can serve as important tools for determining the free fatty acids in VCO because it is rapid, accurate and environmental friendly compared to the conventional chemical analyses.

Item Type:	Article
Uncontrolled Keywords:	fats; frying, oils; virgin coconut oil; Zea mays L.
Subjects:	R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine T Technology > TX Home economics > TX341-641 Nutrition. Foods and food supply
Divisions:	Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Article Zoom Profil Pakar (Expert Profile) > Wan Rosli Wan Ishak (Health Sciences)
Depositing User:	Administrator Automasi
Date Deposited:	20 Jan 2017 07:34
Last Modified:	28 Aug 2017 05:02
URI:	http://eprints.usm.my/id/eprint/31739

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