关键词: 宁夏盐池县, 宁夏盐池县

Abstract:

The objective of this study was to select the optimal microwave extracting technology of antioxidant from Liriodendron chinense, and develop an applicable antioxidant. With the antioxidantion of linoleic acid as a reference, the conditions of extracting antioxidant from Liriodendron chinense were studied through single factors experiments and orthogonal experiment. Effects of pH value and heat treatment on the antioxidant activity of extracts were investigated. The activity of extracts as an antioxidant in lard and vegetable oil was examined. The results showed that the optimal extracting conditions for the antioxidant of liriodendron chinense were as follows: ethanol 75%, solid-liquid radio 1:12, extraction time 5 min, microwave power 210 W. Heat treatment significantly influenced the antioxidant activity of extracts, but pH values did not. The antioxidantion of extracts was obvious in lard. With the concentration of the extract increasing, the yield of hydroperoxide decreased. VE and citric acid had synergistic effect on antioxidant activity of extracts from Liriodendron chinense. The synergistic effect of citric acid was stronger than VE, and the synergistic effect of VC was not significant.