不同产地桑叶总黄酮总多酚含量及抗氧化活性的研究OACSTPCD

Ultrasound extraction was used to extract total flavonoids and polyphenols from mulberry leaves from 8 different regions(Turpan of Xinjiang,Kashgar white mulberry,Kashgar medicinal mulberry,Yibin of Sichuan,Bozhou of Anhui,Taihe of Anhui,Huazhou of Guangdong,and Shangluo of Shaanxi)and standard samples of mulberry leaves from the Chinese Academy of Inspection.The content of total flavonoids and polyphenols extracted from 9 kinds of mulberry leaves was determined,and their antioxidant activities were compared.Single factor experiments were conducted to investigate the effects of factors such as material liquid ratio,extraction solvent concentration,ultrasonic power,and extraction time on the extraction rate of total flavonoids and total polyphenols in mulberry leaves.The results showed that the optimal extraction process was solid-liquid ratio 1∶60 g/mL,ethanol 60%,ultrasonic power of 200 W,and extraction for 30 minutes.The total flavonoid and total polyphenol content of mulberry leaves from Yibin and Turpan were relatively high;mulberry leaves from Yibin,Turpan,and Bozhou had stronger antioxidant activities.There was a positive correlation between the total flavonoid and total polyphenol content of mulberry leaves from various regions and their antioxidant activities.This study provides a basis for the development of mulberry leaves from different production areas.