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- W31271097 abstract "The short-lived fission prcduct rare earths of La, Ce, Pr, Nd, Pm, and Y were completely separated on a sulfonated polystyrene resin (KU-2), 0.12 to 0.10 min mesh size, on a column 100 cm long and 0.65 cm in diameter. The rate of elution was 0.5 ml/min cm/sup 2/. The eluting agent was 0.25 M lactic acid at a pH of 4.0. It was also found that elution with 0.01 M pyrophosphoric acid (pH 5.2 -- 8.0) separated the rare earths as effectively as lactic acid. Up to 90 per cent of a negative complex of cerium with pyrophosphate can be adsorbed on an anion exchanger, while lactic acid forms nc negative complexes with cerium, since cerium is not adsorbed by the anion exchanger EDE-10 from aqueous solutions containing lactute ton. Experiments were carried out at a constant ionic strength (0.5 M NaCI) and a temperature of 25 tained to determine the stability of the cerium lactate complexes present in solution. Corrections were made for the swelling of the resin. The methcd of calculating the constants was taken from a paper by Froneus. It was found that cerium formed the following lactate complexes: STACe(CH/sub 3/CHOHCOO)!/sup 2+/ (K/sub 1/ = 242),more » STACe(CH/ sub 3/CHOHCGO)/sub 2/!/sup +/ (K/sub 2/ = 22 combination rat 12), a nd omparative values for the doubly-charged positive complex are 282 combination rat 20 for Ce, 407 combination rat 20 for Nd, and 436 combination rat 20 for Y. (TTT)« less" @default.
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- W31271097 date "1960-02-01" @default.
- W31271097 modified "2023-09-28" @default.
- W31271097 title "CHROMATOGRAPHIC SEPARATION OF RARE EARTH RADIOACTIVITIES" @default.
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