| Abstract: | Objective] To detect the total flavonoids content in food products of Fagopyrm tataricum(Linn) Gaench by UV spectrophotometry.Methods] Reflux method was used for extraction. Absorbance value was detected by Na NO2- Al(NO3)3method; and the total flavonoids content was calculated with rutin as the reference. Results] Rutin concentration had good linear relationship with absorbance value when the concentration range was 0. 003- 0. 161 mg / m L,with R2= 0. 995 9. The average recovery rate was 98. 305% and RSD was 1. 62%.Conclusions]There were significant differences in the total flavonoids contents in twenty F. tataricum foods; their contents were in the order of buckwheat breakfast cereal(3. 813 mg / g) buckwheat rice(3. 115 mg / g) buckwheat noodle(0. 178- 2. 186 mg / g) buckwheat sachima(0. 228- 0. 573 mg / g) buckwheat biscuit(0. 015- 0. 065 mg / g). This method was rapid,simple,accurate and repeatable,and could be used for the content detection of total flavonoids in F. tataricum foods. |
