抗生素原料在生产过程中因受条件限制,某些抗生素不能用有效成分的重量来表示它的含量,而必须通过微生物或生物检定的方法,用效价单位来表示药物的抗菌效力。但在药品生产和临床用药中,还有以抗生素盐基纯品计重(不包括分子结构中的无机酸、碱、有机酸的重量)和按抗生素全量计重(包括分子 Antibiotic raw materials in the production process due to conditions, some antibiotics can not use the weight of the active ingredient to express its content, but must be microbiologically or bioassay method, the titer unit to indicate the antibacterial efficacy of drugs. However, in drug production and clinical use, antibiotics are also based on pure salt base weight (excluding inorganic acids in the molecular structure, alkali, the weight of organic acids) and the total weight of antibiotics (including molecules