Ayu Dewi Fortuna, Andarwulan Nuri, Hariyadi Purwiyatno, Purnomo Eko Hari
1Department of Food Science and Technology, Bogor Agricultural University, IPB Darmaga Campus, Bogor, 16680 Indonesia.
2Department of Agricultural Technology, Riau University, Bina Widya Campus Km 12.5 Simpang Baru, Pekanbaru, 28293 Indonesia.
Food Sci Biotechnol. 2016 Apr 30;25(2):401-407. doi: 10.1007/s10068-016-0055-1. eCollection 2016.
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) 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.
研究了生育酚、β-胡萝卜素和叶绿素对红棕榈油（RPO）光氧化稳定性的影响。将三酰甘油+生育酚、三酰甘油+β-胡萝卜素、三酰甘油+生育酚+β-胡萝卜素以及三酰甘油+生育酚+β-胡萝卜素+叶绿素的模型体系在30±2°C下于5000、10000和15000勒克斯的光照强度下暴露7小时。每小时评估生育酚、生育三烯酚、β-胡萝卜素、叶绿素的浓度变化以及过氧化值。光照强度加速了三酰甘油+生育酚体系中生育酚的降解以及三酰甘油+β-胡萝卜素体系中β-胡萝卜素的降解。γ-生育三烯酚显示出最高的降解速率，且β-胡萝卜素是对光照强度变化最敏感的化合物，这由最低的光照强度系数（z）值表明。生育酚和β-胡萝卜素共同存在对RPO的光氧化稳定性具有保护作用。叶绿素的存在在高光强度下增加了光氧化速率。生育酚和β-胡萝卜素之间的相互作用有助于RPO的光氧化稳定性。
