铝合金中新添加元素对CDTA滴定法测定Mg含量的干扰实验

Interference experiment of the determination of Mg contents by CDTA titration with the addition of new elements in aluminum alloys

为了证实传统的分析方法是否适用于添加新元素的所有新型铝合金中Mg含量的测定,查阅了现有铝合金牌号及成分,明确了w(Mg)>0.1%的铝合金中新添加的一些元素。就Pb、Sn、Bi、Er、La、Sr、Ce、Cd等新添加元素加人后,对CDTA滴定法测量Mg含量的影响进行了干扰实验。结果表明:除了907Z.1铝合金外,这些元素对铝合金中Mg含量的测定没有干扰影响。

In order to verify whether the traditional analytical method is applicable to the determination of Mg contents in all new aluminum alloys with new elements,the existing aluminum alloy designations and components were consulted,and some new elements added to the aluminum alloy of w;(Mg)>0.1%were identified.After the addition of Pb,Sn,Bi,Er,La,Sr,Ce,Cd and other newly added elements,interference experiments were carried out on the influence of CDTA titration on the determination of Mg contents.The results show that these elements have no interference on the determination of Mg contents in aluminum alloys except 907Z.1 aluminum alloy.