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在用铬黑 T 为指示剂的 EDTA 滴定终点检出方面,应用甲基橙作屏障剂改善终点之观察,方法简单快速。本厂经过一定时期的实际应用,认为准确度也是令人满意的,今将本法述于后。
In the detection of end point of EDTA titration with chrome black T as indicator, methyl orange was used as a barrier to improve the end point observation. The method is simple and rapid. The factory after a period of practical application, that the accuracy is satisfactory, this law will be described later.