Isotopic dilution analysis by ion-exchange—I: Determination of traces of iron

摘要: Abstract Isotopic dilution analysis with the use of ion-exchangers serves for determination trace amounts metals. A theoretical evaluation this method is given, from which conditions a number metals can be predicted. The selectivity may further increased by masking and precipitating agents. proposed has been verified iron using EDTA Dowex 50 cation-exchanger. average precision mean values 10 −7 g Fe/5 ml was 1.2%, −8 ml, 4.0% −9 4.1%. Even large excess many does not interfere in analysis. applied to NaI(Tl) crystals. procedure developed very simple, far more sensitive than colorimetry, activation or other methods used up now determining traces iron.