自络合滴定法在分析化学上应用以来,常量钙、镁的测定几乎都以络合滴定法代替了其它方法。选择适宜的分离方案是整个络合滴定钙、镁流程中极为重要的一个环节。而如何有效地分离(或掩蔽)锰成为分离干扰离子中最引人注目的问题。因为一般说来,锰的存在对大多数金属指示剂均有不利影响。尤其对于目前络合滴定钙、镁时广泛使用 Since the complexation titration method in the analytical chemistry, the determination of calcium and magnesium are almost always replaced by complexometric titration of other methods. Select the appropriate separation scheme is the entire complex titration calcium and magnesium flow is an extremely important part. How to effectively separate (or mask) manganese has become the most noticeable problem in separating interfering ions. Because in general, the presence of manganese adversely affects most metal indicators. Especially for the current complexation titration calcium, magnesium is widely used