Effect of tocopherols, tocotrienols, β-carotene, and chlorophyll on the photo-oxidative stability of red palm oil

Dewi Fortuna Ayu; Nuri Andarwulan; Purwiyatno Hariyadi; Eko Hari Purnomo

doi:10.1007/s10068-016-0055-1

Effect of tocopherols, tocotrienols, β-carotene, and chlorophyll on the photo-oxidative stability of red palm oil

Food Sci Biotechnol. 2016 Apr 30;25(2):401-407. doi: 10.1007/s10068-016-0055-1. eCollection 2016.

Authors

Dewi Fortuna Ayu^{1

2}, Nuri Andarwulan^{1

3}, Purwiyatno Hariyadi^{1

3}, Eko Hari Purnomo^{1

3}

Affiliations

¹ 1Department of Food Science and Technology, Bogor Agricultural University, IPB Darmaga Campus, Bogor, 16680 Indonesia.
² 2Department of Agricultural Technology, Riau University, Bina Widya Campus Km 12.5 Simpang Baru, Pekanbaru, 28293 Indonesia.
³ 3Southeast Asian Food and Agricultural Science and Technology (SEAFAST) Center, Bogor Agricultural University, IPB Darmaga Campus, Bogor, 16680 Indonesia.

Abstract

Effect of tocols, β-carotene, and chlorophyll on photo-oxidative stability of red palm oil (RPO) were studied. Model systems of triacylglycerols+tocols, triacylglycerols+β-carotene, triacylglycerols +tocols+β-carotene, and triacylglycerols+tocols+β-carotene+chlorophyll were exposed to fluorescent light at intensities of 5,000, 10,000, and 15,000 lux for 7 h at 30±2°C. Changes in concentrations of tocopherols, tocotrienols, β-carotene, chlorophyll, and peroxide values were evaluated every hour. Light intensity accelerated degradation of tocols in the triacylglycerols+tocols system and β-carotene in the triacylglycerols+β-carotene system. Gamma-tocotrienol showed the highest degradation rate and β-carotene was the most sensitive compound to changes in light intensity, indicated by the lowest light intensity coefficient (z_i) value. The presence of tocols and β-carotene together showed protective effects for the photo-oxidative stability of RPO. The presence of chlorophyll increased the rate of photo-oxidation at high light intensities. Interactions between tocols and β-carotene contributed to the photo-oxidative stability of RPO.

Keywords: chlorophyll; photo-oxidation; red palm oil; tocol; β-carotene.