取市售诺氟沙星片 (40 0 mg/片 )制成浓度为2 0 mg/ml的混悬液 6 0 ml,试样一式 6份 ,贮于棕色塑料瓶中 ,3份室温 (2 3～ 2 5℃ )贮存 ,3份冷藏 (3～ 5℃ ) ,于 0、7、14、2 8和 5 6 d取样 ,样品一式 2份 ,用高效液相色谱法测定诺氟沙星的稳定性 ,同时对样品的颜色、气味、p H Commercially available norfloxacin tablets (40 0 mg / tablet) made a concentration of 20 mg / ml suspension 60 ml, the sample in 6 copies, stored in brown plastic bottles, 3 copies of room temperature (2 3 to 25 ° C), 3 refrigerated (3 to 5 ° C), samples were taken at 0, 7, 14, 28, and 56 days, and the samples were assayed in duplicate. The contents of norfloxacin Stability, while on the sample color, odor, p H