Stability of Carotenoids in Russula alutacea Fr. Extraction

摘要

In order to survey the stability of carotenoids in Russula alutacea extraction. The survival rate of total carotenoid content in extract was determined under different conditions, including different light, temperature, metal ions, different pH solution, oxidizing and reducing agents. The results showed that all of these conditions could affect the stability of carotenoids in the extraction. The carotenoids were sensitive to sunlight and degraded rapidly in direct sunlight. The carotenoids had a greater loss with the increasing temperature. Acid environment may cause the carotenoids loss, but the carotenoids were relatively stable under alkaline environment. While zinc and ferric ions (Zn~(2+), Fe~(2+) and Fe~(3+)), especially Fe~(3+), could obviously destroy carotenoids. In all, the reducing agent had certain protective effect on the stability of carotenoids. So when using or saving the carotenoids, it was necessary to be dark, low temperature and neutral condition, and avoided using copper and ferric ware. The results will provide a scientific basis for the development and utilization of carotenoids from R. alutacea in Yunnan.