《中国医院制剂规范》西药制剂第2版(以下简称“规范”)中的“硼砂酚醛器械消毒液”(以下简称消毒液),主要成分为硼砂、苯酚、甲醛、呋喃西林等。其中规范未规定呋喃西林的含量测定方法[1],而呋喃西林含量仅为0.002%,在配制过程中,由于称样量少,极易产生误差。为此我们在工作中 “Bortezer Phenolic Apparatus Disinfectant” (hereinafter referred to as disinfectant) in the “Specification of Chinese Hospital Preparations” (Second Edition) (hereinafter referred to as “Specification”) mainly consists of borax, phenol, formaldehyde and nitrofurazone. The specification does not specify the determination of nitrofurazone [1], while the content of nitrofurazone is only 0.002%, in the preparation process, due to less sample, prone to errors. For this we are at work