对工业用水总硬度测定异常现象的研究

Studies on the Abnormal Phenomenon in Determination of the Hardness of Industrial Water

在工业用水总硬度测定中经常出现“返红”现象 。

In determination of the hardness of industrial water, the phenomenon of 'returning red' appears very often. This paper studies the cause of appearing 'return red' and the solution to the phenomenon with the help of experiments.