摘要
对EDTA络合滴定法测定钙镁混合液中钙含量的实验条件进行了研究,提出利用孔雀石绿指示酸度条件pH 12～13的调节,克服了使用pH试纸判断溶液酸度不准确的局限性。应用该法测定白云石中的钙含量,相对平均偏差为0.2%(n=3),加标回收率为99.81%～100.5%。
The titretion condition of Calcium in the sixed solution of Calcium and Magnesium by complexometrie titration was studied. Malachite green was proposed as a indicator using the accommodation of acidity condition pH 12-13, it can overcome the limitation of nondeterminacy of pH test paper. The method was using to the determination of Calcium in dotomite, relative mean deviation was 0.2% （ n=3 ）, and recovery precision was 99.81%- 100.5 %.
出处
《安徽化工》
CAS
2012年第4期62-64,共3页
Anhui Chemical Industry
基金
辽宁师范大学教务处本科生科研训练专项经费资助项目
关键词
孔雀石绿
钙
络合滴定
malachite green
Calcium
complexometrie titration
