摘要
本文报道pH指示剂吸收度比值法测定盐酸乙胺丁醇的含量。该法采用指示剂为0.05%茜素黄R,测定波长374nm和500nm;标准液为0.1mol/L NaOH;仪器为WFZ-800D_2型分光光度计。测得三批盐酸乙胺丁醇的含量分别为99.5±0.04%,99.4±0.05%和99.6±0.03%.同时与药典法比较,结果一致。
The pH indicator absorbance ratio method was applied to the quantitative determination of ethambutole hydrochloride. The determination procedure is as follows:Alizarin yellow R and standard solution of 0.1mol/L NaOH were used; the absorbance values at 374nm and 500nm were measured. The contents of three batches of ethambutole hydrochloride were 99.5%, 99.4% and 99.6%, respectively, which were the same as in the harmacopeia.
关键词
pH指示剂
盐酸乙胺丁醇
比值法
The absorbance ratio method of pH indicator
Ethambutole hydrochloride
