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采用多波长吸收度比值差法，不经分离直接测定复方甲硝唑滴耳液中甲硝唑和诺氟沙星的含量。平均回收率分别为：101．0％（RSD＝0．65％），10O．4％（RSD＝1．04％）。
The method of multi-wavelength absorbance ratio difference was used to directly determine the content of metronidazole and norfloxacin in compound metronidazole ear drops without separation. The average recoveries were: 101.0% (RSD = 0.65%), 10O. 4% (RSD = 1.04%).