1.Research Center of Buckwheat Industry Technology,Institute of Plant Genetic and Breeding,School of Life Sciences,Guizhou Normal University,Guiyang,Guizhou 550001; 2.Triticeae Research Institute,Sichuan Agricultural University,Wenjiang,Sichuan 611130; 3.College of Chemistry and Biology,Anshun University,Anshun,Guizhou 561000
Taking Fagopyrum cymosum complex leaves as material,ultrasonic extraction method was used to extract flavonoids from Fagopyrum cymosum complex leaves,and a new determination method base on NaNO2-Al (NO3)3-NaOH spectrophotometric method was built.The results showed that this method was convenient,accurate,and reproducible,which could be used for flavonoids content determination of other parts in Fagopyrum cymosum complex.