A note on successive complexometric determination of thorium and rare earths.
An improved method for successive determination of thorium and rare earths is described. It is based on the EDTA titration of thorium at pH 2 (Xylenol Orange as indicator) followed by addition of acetylacetone-acetone mixture, adjustment of the pH to 5-5.5 with hexamine, and by further EDTA titration of rare earths with the same indicator.
Pribil
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Analytical Laboratory J. Heyrovský Polarographic Institute Czechoslovak Academy of Sciences Prague 1, Jilská 16, Czechoslovakia.
Veselý
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