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Krisna Margaretta Malau
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Environmental Science

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Kinetics of Vitamin A Degradation and Oxidation of Palm Oil Fortified with Retinyl Palmitate and ?-Carotene from Red Palm Oil Krisna Margaretta Malau; Nuri Andarwulan; Drajat Martianto; Desty Gitapratiwi; Ayu Cahyaning Wulan; Dwi Fitriani; Purwiyatno Hariyadi
International Journal of Oil Palm Vol. 2 No. 3 (2019): September 2019
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v2i3.44

Abstract

Retinyl palmitate and ?-carotene from red palm oil (RPO-?-carotene) can be used as sources to fortify vegetable oil. The present study tested three types of bulk palm cooking oil with a peroxide value (PV) of 0, ±4, and ±8 mEq O2kg-1 which each was fortified with retinyl palmitate or RPO-?-carotene alone and combination of both fortificants. The stability of the fortificants in oil samples during storage was investigated. A kinetic analysis of oxidation reaction in fortified palm cooking oil stored in tightly closed amber vials in the dark at different temperatures (60±5, 75±5, and 90±5 °C) was conducted, and then PV, vitamin A concentration and their change rate of reaction in the oils were measured. It reveals that initial PV and mixture of retinyl palmitate and RPO-?-carotene in fortified oil affected the oil stability. Higher initial PV of oil increased the reaction rate constant of peroxide formation and degradation of vitamin A activity during storage. Oxidation reactions of oil samples fortified with the mixtures of retinyl palmitate and RPO-?-carotene was faster than that fortified with retinyl palmitate or RPO-?-carotene only. Our research suggests that applying single fortificant of retinyl palmitate or RPO-?-carotene in oil is more stable than that fortified with combination of both fortificants.
Co-Authors Ayu Cahyaning Wulan Desty Gitapratiwi Drajat Martianto Dwi Fitriani Nuri Andarwulan Purwiyatno Hariyadi