关于铝合金中镁的络合滴定,常用的方法是将试样经氢氧化钠分解,用酸溶解铁、镁等氢氧化物沉淀借铜试剂分离或借氰化物等掩蔽干扰元素后用EDTA滴定。本文报告采用多种掩蔽剂联用有效地消除钙、锰、铝、铁、稀土、铜、铅、锌、镍等干扰元素的影响,用DCTA或EDTA无氰直接络合滴定镁的方法。经分析多种牌号的铝合金标样,获得了满 About aluminum alloy magnesium complexation titration, the commonly used method is the sample decomposition by sodium hydroxide, with iron, magnesium and other hydroxide precipitation precipitation by copper reagent separation or cyanide masking interference element titration with EDTA . This paper reports the use of a variety of masking agents combined with effectively eliminate the interference of calcium, manganese, aluminum, iron, rare earth, copper, lead, zinc, nickel and other interference elements, using DCTA or EDTA cyanide direct complex titration of magnesium. After analysis of a variety of grades of aluminum standard, got full