除惰性气体和其它组的个别元素外,几乎所有门捷列夫周期表的元素都可以用络合滴定法(直接滴定或反滴定或者间接滴定),进行定量测定。络合滴定的选择性颇低,所以当前提高选择性是络合滴定分析法的主要任务。提高络合滴定法的选择性多半采用适当的试剂掩蔽干扰离子。本文简要地评述无机和有机掩蔽剂。不分离干扰离子而消除其干扰作用的称为掩蔽剂。在络合滴定中所用的掩蔽剂生成的化合物阻止这个或那个金属络合物形成。掩蔽剂减少游离的被掩蔽离子的浓度和降低它和络合滴定剂之间的稳定度。鉴于这个观点研究讨论下 Almost all elements of the Mendeleev’s periodic table, except for the individual elements of inert gases and other groups, can be quantified by complexometric titration (direct titration or reverse titration or indirect titration). The selectivity of complexometric titration is quite low, so the current task of improving the selectivity is the main task of complexometric titration. Improve the selectivity of complexometric titration Most of the appropriate reagents to mask interfering ions. This article briefly reviews inorganic and organic masking agents. Do not separate the interference of ions and eliminate the interference of the role known as the masking agent. The compounds generated by masking agents used in complexometric titration prevent the formation of this or that metal complex. Masking agents reduce the concentration of free masked ions and reduce the stability between it and the complexed titrant. In view of this view research discussion