Microwave-aided Extraction and Antioxidant Activity Assessment of Red Pigments from Lonicera edulis Fruits

The microwave-aided extraction of red pigments from the fruits of Lonicera edulis was optimized using orthogonal array design method based on single factor investigations for maximizing the 520 nm absorbance of the extract.Meanwhile,DPPH radical scavenging assay was employed to assess whether the extracted pigments have antioxidant effect.The optimum microwave-aided extraction conditions were as follows:ethanol concentration 65%,solid/liquid ratio 1:10(g/mL),microwave power 540 W,and extraction time 90 s.The maximum red pigment yield was 105.5 mg/100 g of fruits under such conditions.The red pigments had the ability to scavenge DPPPH free radicals.