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长期以来,在国内有些文献和书籍中,经常引用各种形式的判别式来讨论络合滴定的基本问题,如金属离子能否准确被滴定;终点误差多少;共存金属离子是否有干扰等。这些判别式来源于雅齐米尔斯基公式。我们认为,用判别式来处理络合滴定中的基本问题,在某种特定的条件下,虽然结论是正确的,但处理方法不够严谨,故特提出我们的看法,供同志们讨论。
For a long time, in some domestic literature and books, we often quote various forms of discriminant to discuss the basic problems of complexometric titration, such as whether metal ions can be titrated accurately, how much the end point error, and whether metal ions interfere with each other. These discriminants come from the Yazimi Milsky formula. In our opinion, using discriminant to deal with the basic problems in complexometric titration, under certain conditions, although the conclusion is correct, the treatment method is not rigorous enough. Therefore, we put forward our own views for discussion by our comrades.