[1]School of Pharmacy Southwest Minzu University Chengdu 610041 China;
[2]Tongren City Bijiang District Secondary Vocational School Tongren 554300 China;
[3]Institute of Botany The Chinese Academy of Sciences Beijing 100093 China;
[4]Department of Wine and Food Engineering Sichuan Technology Business College Dujiangyan 611830 China;
[5]Ethnic Medicine Institute Southwest Minzu University Chengdu 610041 China;
Sanguisorbae Radix; Carbonized sanguisorba root; Total flavonoids; Extraction process; Content determination;