Abstract:

Extraction process parameters of antioxidant flavonoids pigment in sorghum shell were optimized to improve the production of natural pigments. In this paper, the extraction of flavones from durra seed capsule was studied. On the basis of single-factors experiments, the response surface methodology were used to study the effect of extraction time, material solvent ratio and temperature on durra seed capsule flavones levels and Fe3+ of reduction, and the antioxidant of raw extraction from durra seed capsule was determined. The results showed that, the optimal extraction conditions were as the following: the ratio of liquid to solid 84.2:1 (mL:g), the temperature 73.5℃ and the time 104.4 min, under such conditions the extraction concentration of flavones was up to 5.7889 g/100 g, while the largest total reducing force of flavones was also obtained and the best reducing force date of flavones was 1.0863. The linear correlation of total reducing force and concentration of flavones reached significant. In addition, the raw extraction from durra seed capsule showed antioxidant function in vitro.