The invention provides a method for improving the stability of blueberry
anthocyanin. According to the method, the blueberry
anthocyanin purified by virtue of ADS-750
macroporous resin is taken as a
raw material and is added with 10% preheated
cow milk protein drying powder to form an
anthocyanin stabilizer, so that the stability of the blueberry anthocyanin is improved in the
processing and production processes; and
citric acid is added to adjust the pH value so as to enable proteins to reach an
isoelectric point, so that the proteins can play a role of a relatively good stabilizer. The
cow milk protein drying powder is prepared by virtue of a low-temperature
freeze drying method, and
casein with the highest content in the
cow milk protein drying powder can be taken as the anthocyanin stabilizer, has a special structure and is used for usually
coating small molecule substances, so that the problem that anthocyanin in a traditional blueberry product is poor in stability in the
processing and storage processes can be effectively solved; meanwhile, by adding cow
milk protein, the
nutrition of the blueberry product is greatly increased; and besides, by utilizing a non-thermal
processing technique, the binding of the blueberry anthocyanin and the
casein is relatively tight, the effects of killing
bacteria and prolonging the guarantee period of the blueberry product can be achieved, and the operation process is safe, sanitary, simple, low in
energy consumption and
pollution-free.