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现有钍(Ⅳ)和铈(Ⅲ)的库仑络合滴定是用电生的EDTA或Fe(Ⅱ)-EDTA来滴定,但选择性不高。本文研究了用电生汞(Ⅱ)滴定被柠檬酸置换出与钍络合的EDTA和用苹果酸置换出铈(Ⅲ)络合的EDTA,实现了铈(Ⅲ)、钍(Ⅳ)连续库仑络合液定。
The existing Coulometric complexometric titration of thorium (Ⅳ) and cerium (Ⅲ) is titrated with EDTA or Fe (Ⅱ) -EDTA, but the selectivity is not high. In this paper, the electrocatalytic mercury (Ⅱ) titration was replaced by citric acid with EDTA and replaced with malic acid to form EDTA complexed with cerium (Ⅲ), and the continuous coulombs of cerium (Ⅲ) and thorium (Ⅳ) Complexing fluid set.