铝合金中镁的快速测定

RAPID DETERMINATION OF Mg IN AI-ALLOY

本文介绍的铝合金中镁的快速测定是不需分离，采用DDTC、盐酸羟胺、三乙醇胺联合掩蔽剂掩蔽大量的铝及铜、铁、锰离子，在PH10以铬黑T为指示剂，用EDTA滴至溶液由紫红色变为纯蓝色为终点。方法简单、快速、准确度高，适合于铝合金中各种镁含量的测定．

The rapid determination of Mg in Al-alloy introduced in this paper does not require a seperation step,while a screening agent composed of DDTC,hydroxy amine hydrochloricacidrand triethanolamine is used to screen large amount of Al and ions of copper, iron andmanganese,and chrome black T is used as an indicator,the end point is reached when the colorof solution changes from violet to pure blue as titrated with EDTA under PH 10. This methodis simple, rapid and of high accuracy, and is applicable for various Mg in Al alloys.