In this way, the absorbance of methanol solution of the separated yuanhuacine amy be determinated by UV spetraphotometry. Then the content is obtained by means of the absorption coefficient, E_(1cm)~(1%) 232nm= 814.4,of yuanhuacine.

• 然后用分光光度法测出其甲醇液的吸收度；再由芫花酯甲的百分吸收系教E_(1cm)~(1%25)232nm=814.；4得出其含量。