Study on Oxidative Stability and Degradation Kinetics of Oil System Rich in Highly Soluble β-carotene
In order to investigate the oxidative stability and degradation patterns of oil systems rich in highly sol-uble β-carotene(the total cis-β-carotene accounted for about 40％,and its oil-based content was about 10 mg/mL,peroxide value was used as an evaluation index,the oxidative stability of different oils(soybean oil,olive oil,evening primrose oil and fish oil)rich in highly soluble β-carotene was first investigated by establishment of degradation kinetic equations at different storage temperatures(-18,4,20,37 ℃).Storage oxidative degrada-tion patterns of β-carotene and its isomers in olive oil were also further investigated.The results indicated that the antioxidant effects of highly soluble β-carotene in different oil systems were in the following order:olive oil＞soybean oil＞evening primrose oil＞fish oil;the degradation of β-carotene during concomitant storage was in accordance with the first-order kinetic model;the order of stability of β-carotene isomers in olive oil was:All-E＞Total Z＞13 Z,and with the total content of β-carotene isomers decreased due to oxidative degradation,the peroxide value of olive oil also increased,indicating that the effectiveness of highly soluble β-carotene against lip-id oxidation was reduced.
万方数据
维普
