漂白粉的有效成分是其中的Ca(OCl)_2。对漂白粉有效成分的分析,已有碘量法或亚砷酸盐滴定等经典而且可靠的方法。库里堡等会研究过用比色法进行测定。本文的主要目的是为车间分析提供节省碘化钾耗用量而且比较简便的方法。同时在理论上作了一些初步探讨。一、原理ClO~-是一个强氧化剂,能把碘离子氧化成游离的碘或IO~-、IO_3~-及IO_4~-等。决定的因素是反应时 The active ingredient of bleaching powder is Ca (OCl) 2. Analysis of the active ingredients of bleaching powder, the iodine method or arsenite titration and other classic and reliable method. Cullinburg et al. Have studied the use of colorimetric assay. The main purpose of this paper is to provide a simpler method to save the consumption of potassium iodide for plant analysis. At the same time in theory made some preliminary discussions. First, the principle ClO ~ - is a strong oxidant, iodine ion can be oxidized into free iodine or IO ~ -, IO_3 ~ - and IO_4 ~ - and so on. The deciding factor is reaction time