Optimization of total nutrient powder from buckwheat buds by spray drying

Using flavonoids and Vc content as indicators,the factors of preparing buckwheat buds powder by centrifugal spray drying was investigated.The optimal process conditions:inlet air temperature was 170 ℃,and at the exit was 80 ℃,the rotating speed of centrifugal atomizer was 15000 r/min,liquid feed rate was 70.6 mL/min,and the ratio of material to water was 1:2.The content of flavonoids was 22.34 mg/g and Vc was 1.72 mg/g.