포장방법에 따른 국산 대두(Baektae)와 연해주 대두(Bazaz) 분말의 저장 중 산패도 변화

The changes of lipid oxidation of soybean powders from Korea (Baektae) and East Russia (Bazaz) were compared with different packages. The soybean from the East Russia (Bazaz) is a good resource to fulfill Korean consumer’s needs for the non-GMO soybean. The lipid oxidation associated with storage of soybean powder is critical for quality. Three different packages, such as air contained, vacuum, and nitrogen packages, were applied and compared. To monitor the changes of lipid oxidation, TBA test, acid value, POV test, and fluorescence spectrum test were conducted. The storage temperature and period were 25°C and 20 days, respectively. Both Baektae and Bazaz did not show any significant difference during the storage at 25°C. Samples from all the packages maintained the initial quality of soybean powders. The slight increase of TBA values and POV values at the end of the storage period was observed but those were in the acceptable range. To verify the quality of storage samples, the iodine value, saponification value, and the specific gravity were measured and showed that all measurements were in the acceptable range to be used as an ingredient for processed food, such as soybean oil.