磺胺类药物的含量测定,以往都是用亚硝酸纳滴定,因采用外指示剂,较不容易掌握。我们在实际工作中采用溴酸钾电位滴定来进行磺胺类药物含量的测定,证明用这方法,不仅准确性高,易于掌握,操作时间短,而且所用试剂和样品的量也很小,现介绍如下,供药检工作者参考:一、用具:(1)pH 计一具,甘汞电极、铂电极各一。(2)10 ml 小滴定管(或25ml 滴定管)。 The determination of sulfa drugs has been titrated with sodium nitrite in the past. The use of external indicators is not easy to grasp. We used Potassium bromate potentiometric titration to determine the content of sulfa drugs in actual work, which proved that using this method not only has high accuracy, is easy to grasp, but also has a short operation time, and the amount of reagents and samples used is also very small. Reference for drug test workers: 1. Appliances: (1) pH meter, calomel electrode, and platinum electrode. (2) 10 ml small burette (or 25 ml burette).