本文报道了用比色法测定罗布麻制剂(煎剂干粉、复方片剂)中黄酮类化合物含量的方法。此法采用95%乙醇提取,然后以60%乙醇(片剂用乙酸乙酯)沉淀,加显色剂(10%亚硝酸钠溶液、10%硝酸铝溶液和氢氧化钠试液),在510nm波长处测定吸收度。此法简便易行。加样回收率为99.4±2.23%。初步认为可作为评价其制剂质量的一种有效方法。 In this paper, a colorimetric method was used to determine the content of flavonoids in Apocynum preparations (decoction dry powder, compound tablets). This method was extracted with 95% ethanol, then precipitated with 60% ethanol (tablets with ethyl acetate), and added with a reagent (10% sodium nitrite solution, 10% aluminum nitrate solution, and sodium hydroxide solution) at 510 nm. The absorbance is measured at the wavelength. This method is simple and easy. The recovery was 99.4±2.23%. It is initially considered as an effective method for evaluating the quality of its preparations.