Study on the preparation of different polar extracts of Artemisia argyi and their antioxidant activities
In order to provide a theoretical basis for the development of antioxidant products of Artemisia argyi,in the present study,the whole herb of Artemisia argyi was extracted by soaking in EtOH,and the extact solvent was concentrated and then extracted with n-hexane,ethyl acetate,and n-butanol(together with water layer)to obtain n-hexane extract(extract 1),ethyl acetate extract(extract 2),n-butanol extract(extract 3),and water layer,respectively.All four extracts showed some scavenging ability for both DPPH and ABTS radicals,with the ethyl acetate extract(extract 2)showing the best scavenging ability for both radicals.At a concentration of 0.4 mg/mL,the scavenging of DPPH and ABTS free radicals by the ethyl acetate extract was basically the same as that of the positive control VC,with 94.42％and 98.46％,respectively,and the IC50 values were 0.043 mg/mL and 0.041 mg/mL,respectively.
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