ABTS method can be used to determine the antioxidant capacity of hydrophilic and lipophilic substances, and it is the
most widely used indirect detection method. ABTS is oxidized to form a stable blue-green cation ABTS radical with the
largest absorption peak at 405 nm or 734 nm. After the tested substance is added into ABTS free radical solution, the
antioxidant component can react with ABTS free radical to make the reaction system fade, and the absorbance of 405 nm