电导滴定法分析4,6-二氨基间苯二酚的纯度

Study on quantitative analysis of purity of 4,6-diaminoresorcinol dichloride by conducto metric titration

研究了酸碱滴定和AgNO3滴定4,6-二胺基间苯二酚盐酸盐水溶液电导的变化,利用电导滴定曲线变化分析其纯度.通常的滴定方法电导率数值不稳定,转折不明显,提出的碱量法和Ag量法终点明显,其中Ag量法结果准确可靠、重复性好、相对偏差小于0.49%.

This paper studied the change of conductivity of 4,6-diaminoresorcinol dichloride aqueous solution in the acid-base titration and AgNO_3 titration. The purity of 4,6-diaminoresorcinol dichloride can be calculated based on the conducto metric titration curve. In general titration the readings are changing continuously and the turning point of conductivity is not clear. But the turning point of conductivity through the method in this paper is very clear and especially the method of Ag is accurate, reliable with good repeatability. The RSD is less than 0.49%.