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头孢氨苄片是目前临床常用的抗生素,其质量标准收载于一九九○年版《中国药典》二部。本品的含量测定采用碘量法,其样品溶解方法为:“取本品10片,精密称定,研细,精密称取适量(约相当于头孢氨苄0.25g),置250ml容量瓶中,加水100ml,振摇30分钟,使头孢氨苄溶解,再加水稀释至刻度……”。简称药典法。我们在对头孢氨苄片进行含量测定中发现,由于
Cefalexin tablets are currently commonly used antibiotics, the quality standards are contained in the 1990 edition of the “Chinese Pharmacopoeia” two. This product is determined by iodometry method, the sample dissolution method: “Take this product 10, accurately weighed, small study, precision weighed amount (about equivalent to cephalexin 0.25g), set 250ml volumetric flask, Add water 100ml, shaking for 30 minutes, the cephalexin dissolved, diluted with water to the mark ...... ”. Referred to pharmacopoeia. We found in the determination of cephalexin tablets, due to