“永停”终点法测定2-萘胺-1-磺酸中的总氨基值

The Determination for the Value of Amino-group in 2-Aminonaphthalene-1-sulfonic Acid with the Method of“Permanent Stop

本文提出了“永停”终点法指示终点的反重氮化滴定方法，其滴定终点的判定快速、灵敏、准确。方法用于２－萘胺－１－磺酸中总氨基值的测定，取得了满意的结果。

A method for the reverse diazotization titration has been developed with the method of 'permanent stop'to indicate the tirminal point of titration.In this way,tirminal point is decided rapidly,sensitively and accurately.This method has been used to determine the value of amino-group in 2-Aminaophthalene-1-Sulfonic Acid.