| Schaal oven method was used to study changes of acid value, peroxide value, p-AV, tocopherol content and fatty acid composition and content of Xanthoceras sorbifolia oil obtained by cold pressing from microwave-pretreated Xanthoceras sorbifolia seed kernel during storage, and the effect of microwave pretreatment on the oxidation stability of Xanthoceras sorbifolia oil was evaluated. The correlation between these indexes was analyzed. The results showed that the peroxide value and K232 of Xanthoceras sorbifolia oil increased rapidly in the early storage period, tended to be flat in the middle storage period, and increased rapidly in the late storage period,while the acid value, p-AV and K270 increased continuously. The tocopherol content and oxidative induction time decreased rapidly in the early and late storage periods, but slowly in the middle storage period. The ratio of unsaturated fatty acid to saturated fatty acid decreased. The correlation analysis showed that the oxidation stability of Xanthoceras sorbifolia oil during storage was closely related to the tocopherol content, peroxide value, acid value, p-AV, K232 and K270. In addition, appropriate microwave treatment was beneficial to enhance the oxidation stability of Xanthoceras sorbifolia oil. |
