电导返滴定法测定苯酚含量

Determination of the Amount of Phenic Acid by Electric Conductance to Returning Titration.

向苯酚试液中加入定量过量的ＮａＯＨ标准溶液，用Ｈ３ＢＯ３标准溶液滴定过量的ＮａＯＨ，通过计算求得苯酚含量，测定下限为１０－５ｍｏｌ／Ｌ。并成功地测定了某化工厂废液中苯酚含量。

It is stated in this paper,a new method about the determination of phenic acid by electric conductance to returning titration,to determine the amount of phenic acid in industrial effluent.Add some excessive quantity of normal solution of sodium hydroxide to phenic acid sample to be tested and with normal solution of acid to titrate the excessive solution of sodium hydroxide,then,by calculation,we get the amount of phenic acid.The lower limit is 10 -5 mol/L.And with this method we tested the amount of phenic acid in the industrial effluent of a chemical factory successfully.