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Supercritical CO2 extraction of corn yellow pigment

     Corn yellow pigment is mainly composed of lutein, zeaxanthin and cryptoxanthin and other carotenoids. It is a kind of natural pigment widely existed in many plants and is also a kind of compound necessary for the human body.
     Corn yellow pigment is a natural food coloring agent, it is not only a natural pigment, but also the production of health food additives, they as natural pigments have been in Europe and the United States and other countries approved for food pigments, in the corn kernel contains about 0. 01~0. 9mg/100g. Because of the uncertainty about the potential impact of synthetic pigments and related additives, such natural food additives are widely welcomed today.

     In recent years, the research on the function of zeaxanthin has drawn more and more interest. It mainly focuses on the relationship between zeaxanthin and ophthalmopathy, heart disease and cancer. At the same time, their antioxidative properties are of great interest. Epidemiological studies have shown that the intake of vegetables rich in carotenoids (including zeaxanthin) is negatively correlated with the occurrence of cancer. Ingesting foods rich in carotenoids can improve health and reduce the risk of developing cancer, cardiovascular, Department of disease and cataract risk.

     The results show that the use of supercritical CO2 extraction technology in the extraction of corn yellow pigment can get high yield, high color price, non-toxic corn yellow pigment products, and provide an effective way for comprehensive utilization of corn industry.