Physicochemical properties and in-vitro antioxidant capacity of Semen Astragali Complanati wine

Abstract

In this paper, the physicochemical properties of the Semen Astragali Complanati wine was first investigated including the pH, electrical conductivity (EC), titratable acid, alcohol content, residual sugars, chromatic characteristics and flavonoids, and thereafter the in-vitro antioxidant capacity and its correlation with the total phenolic and flavonoids content were systematically evaluated and analyzed for the different fractions of the Semen Astragali Complanati wine by six antioxidant assays and the Pearson product–moment correlation, respectively. On a whole, there are no significant differences between the Semen Astragali Complanati wine and the grape wine regarding most of the conventional enological parameters. The antioxidant assays showed that the Semen Astragali Complanati wine exerts great antioxidant capacity, which is attributed to the high content of polyphenols and flavonoids contained such as complanatoside A and rhamnocitrin, since high correlations exhibited between the total content of phenols and flavonoids, and the in-vitro antioxidant activity, respectively. All these results indicate that the Semen Astragali Complanati could be fermented to wine and be as a natural source of antioxidants preventing damage associated with free radicals and offer alternatives to develop high value-added products to enhance health benefits.

Keywords

• Physicochemical properties
• in-vitro
• antioxidant capacity
• Semen Astragali Complanati
• wine