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用差示分光光度法和双波长分光光度法测定安痛定片中氨基比林和非那西丁的含量，平均回收率为100．4％和100．2％，RSD分别为0．24％、0.31％。方法简便、快速、准确。
The contents of aminopyrine and phenacetin in Ansongding tablets were determined by differential spectrophotometry and dual-wavelength spectrophotometry. The average recoveries were 100.4% and 100.2% with RSDs of 0.24% , 0.31%. The method is simple, fast and accurate.