Purification of yellow pigment from the flos Sophorae
There are lots of polysaccharides in extracts of flos Sophorae. We need to except polysaccharides from the extracts for pure yellow pigment of flos Sophorae. This article optimized the conditions of excepting polysaccharides from the extracts of flos Sophorae with ethyl alcohol. The optimal condition is as following: the rate of 1∶3 for the extracts and ethyl alcohol, soaking time of 8h. Then it get pure yellow pigment of flos Sophorae after spray drying.