摘要
在强碱性条件下，利用铝的两性特点，使铝与其它金属离子分离。在酸性介质中过量EDTA存在下，铝与EDTA络合，用铅盐络合剩余的EDTA，再以氟化钠置换出与铝络合的EDTA，以铅盐滴定置换出来的EDTA，从而计算铝含量。通过对络合剂用量、酸度影响、共存元素干扰等进行探讨，确定了最优分析条件。方法的加标回收率为99．6％-100．6％，测定结果的相对标准偏差为0．24％（n=10）。
In strong alkaline conditions, aluminum was separated from other metal ion by using the gender characteristics of aluminum. Aluminum was complexed in the presence of an excess of EDTA in acidic medium, and the residual EDTA was complexed with lead salt. The EDTA which complexed with aluminium was replaced by sodium fluoride, and the lead salt was used to titrate the EDTA, then the aluminum content was obtained. The optimum analysis conditions were determined by discussing the amount of complexing agent, the effect of acidity, and the interference of coexisting elements. The recovery was 99.6%-100.6%, and the relative standard deviation was 0.24% （ n=10 ）.
出处
《化学分析计量》
CAS
2013年第4期99-100,共2页
Chemical Analysis And Meterage
关键词
莫来石
铝
返滴定法
mullite
aluminum
back titration method
