Adopting colorimetry method define that the boiling and extraction influence on the onion flavonoids content, which determining the Soxhlet extraction as the method of onion flavonoids extraction.

• 采用超声波法从洋葱中提取黄酮类化合物并探讨了最佳提取条件,建立洋葱中黄酮化合物的光谱分析方法。