铝合金中镁的快速测定

Rapid Determination of Mg in Aluminium Alloy

该文介绍的铝合金中镁的快速测定不需分离 ,采用DDTC、盐酸羟胺、三乙醇胺联合掩蔽剂掩蔽大量的铝及少量的铜、铁、锰离子 ,在pH1 0条件下 ,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 。

The rapid determination of Mg in aluminium alloy does not involve a separation process.By using a complex masking agent containing DDTA,oxyamine hydrochloride and triethanolamide,a large amount of aluminium and a small amount of ions of copper,iron and manganese are masked.At pH 10 and with chrome black as indicating agent,the alloy solution is titrated from pure blue to purple color with EDTA.The method is simple,rapid and precise,thus suitable for the determination of Mg in aluminium alloy.