我们按北京市卫生局编《制剂手册》关于硼酸滴耳剂的制备方法“把硼酸研成细粉,装入带盖烧瓶中,加乙醇至足量,置水浴上加热约50℃并不断搅拌至全溶,放冷过滤,滤器加乙醇至100ml,即得”。但实际操作中,既使加热并不断搅拌仍需很长时间,且在配制时须经常开启瓶塞,否则,会因乙醇蒸气 We prepared by the Beijing Municipal Health Bureau, “Preparation Manual” on the preparation of boric acid eardrops “The boric acid into a fine powder, into a covered flask, add ethanol to a sufficient amount, set the water bath to heat about 50 ℃ and continue Stir until completely dissolved, let cool filter, filter plus ethanol to 100ml, that was ”. However, in actual operation, it takes a long time to heat and stir continuously, and the bottle stopper must be often opened during preparation. Otherwise, ethanol vapor