The results of content determination showed that the total flavonoid content was lower in Morus alba leaves. 方差分析表明，同属白桑的不同种质资源桑叶总黄酮含量差异极显著。
By using ultrasonic extraction and spectrophotometry methods, changes of flavonoids content in Catharanthus roseus during different developmental periods were studied. 摘要以长春花为试材，应用超声提取和分光光度法测定和分析了不同发育阶段长春花不同部位总黄酮含量的动态变化。
