本文介绍用示波极谱滴定法测定咳快好及其片剂，使用汞膜电极为指示电极，钨电极为参比电极。样品液中加入醋酸钠缓冲液使ｐＨ呈５．４～５．７再加入定量过量的四苯硼钠标准液，使咳快好定量沉淀，过滤，过量的四苯硼钠用硫酸亚锭标准液四滴，本法快速、简单、准确。平均回收率为９９．５４％，相对标准偏差为０．２２％。 This article describes the use of oscillopolarographic titration cough fast and tablets, mercury electrode as the indicator electrode, tungsten electrode as the reference electrode. The sample solution was added sodium acetate buffer to pH 5.4 ~ 5.7 and then added to a quantitative excess of tetraphenyl boron sodium standard solution so that the rapid quantitative precipitation of cough, filtration, excessive sodium tetraphenylborate with sub-standard sulfate Four drops of liquid, this method is fast, simple and accurate. The average recovery was 99.54% with a relative standard deviation of 0.22%.