用稀硫酸水解乙肝茶中结合型蒽醌再用氯仿萃取 ,以 5 %氢氧化钠 - 2 %氢氧化铵混合碱液显色。在 5 1 0nm波长处测定吸收度 ,计算含量 ,结果线型关系良好 (r =0 .9972 ) ,平均回收率为 1 0 0 .6 %。 Diluted sulfuric acid was used to hydrolyze the conjugated quinones in the Hepatitis B tea and then extracted with chloroform. The color was developed with 5% sodium hydroxide-2% ammonium hydroxide mixed lye. The absorbance was measured at the wavelength of 510 nm. The content was calculated. The results showed that the linear relationship was good (r = 0.19972) and the average recovery was 10.06%.