Dual wavelength spectrophotometry was used to determine the mixture of phenanthrene and phenanthraquinone at the same time.The results show that this method is simple,rapid and accurate.

• 用双波长分光光度法对菲与菲醌的混合成分进行了同时测定,样品不经分离,方法简便,测定快速,结果准确,可靠