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分别采用差示－三波长分光光度法和单波长分光光度法测定复方利福平胶囊中的异烟肼及利福平。方法简便、准确。回收率和ＲＳＤ分别为９９．７９％、９９．３４％和０．５３％、０．６７％。
Difference - three wavelength spectrophotometry and single wavelength spectrophotometry were used to determine isoniazid and rifampin in compound rifampicin capsules respectively. The method is simple and accurate. The recoveries and RSDs were 99.79%, 99.34% and 0.53%, 0.67%, respectively.