Determination of Polysaccharide Content and Antioxidative Study of Tricolor Quinoa
Objective:To compare the content of polysaccharide in red,white and black quinoa,and to evaluate the antioxidant activity of quinoa polysaccharide in vitro.Method:The polysaccharide of red,white and black quinoa was extracted by ultrasonic-assisted extraction,and the content of polysaccharide was determined by UV-VIS spectrophotometry.DPPH free radical scavenging tests were conducted on red,white and black quinoa polysaccharides.Result:The results of 3 kinds of quinoa polysaccharide content were white quinoa polysaccharide＞black quinoa polysaccharide＞red quinoa polysaccharide.The results showed that white quinoa polysaccharide had the strongest antioxidant activity in vitro.Conclusion:In this study,the differences of polysaccharide content and antioxidant activity of quinoa in different colors were identified,which provided a reference for the extraction,purification,production and market transformation of quinoa polysaccharide active components.
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