在减水剂生产过程中,往往会带入一定量的氯根。因此,为了保证混凝土施工质量,有必要对减水剂中的有害成分氯根加以测定。目前,测量氯根的方法很多,如容量法、比色法、电位滴定法。但对减水剂来说,由于试样呈褐色,既无法观察滴定终点,亦无法测量吸光度的变化,因此前两种 In the production of water-reducing agents, a certain amount of chlorine is often introduced. Therefore, in order to ensure the quality of concrete construction, it is necessary to determine the chlorine content of the harmful components in the water reducer. At present, there are many methods for measuring chloride, such as volumetric method, colorimetric method, potentiometric titration method. However, for the water reducer, since the sample is brown, neither the end point of the titration nor the change of absorbance can be observed, so the first two