Journal Of
Polyphenols

Abstract: Abstract Diabetes is one of the most difficult chronic diseases to cure in the world, which seriously affects people’s health and quality of life. Flavonoids in buckwheat can regulate blood glucose levels by inhibiting α-amylase activity. Therefore, sweet buckwheat produced in Inner Mongolia was used as the research object, and buckwheat flavonoids were extracted by ultrasonic-assisted extraction method. Total flavonoids content was determined by ultraviolet-visible spectrophotometry. With acarbose as the positive control, the inhibition test of α-amylase was carried out by DNS colorimetry to study the inhibition behavior of flavonoids on α-amylase activity. The results showed that the extraction process of flavonoids was stable and reliable, and the established method for the determination of flavonoids was simple, accurate and reproducible. The total flavonoids content of buckwheat samples was 2.706 mg/g, buckwheat total flavonoids extraction solution had an inhibitory effect on α-amylase, and its median inhibition concentration (IC₅₀) was 38.53 mg/mL. The results of this experiment provide a technical reference for the development and utilization of flavonoids in Inner Mongolia sweet buckwheat, and provide a theoretical reference for the development and application of flavonoid-rich hypoglycemic food.

Key words: buckwheat, total flavonoids content; α-amylase, activity inhibition