Concentration of yttrium subgroup impurities in high-purity yttrium oxide by TBP-NH(4)SCN extraction chromatography.
Separation factors for all the yttrium subgroup elements and yttrium, extracted with TBP from 0.45M NH(4)SCN solution at 24-42 degrees have been determined and found to be 1.9. Eight yttrium subgroup impurities in high-purity yttrium oxide have been concentrated by means of TBP-NH(4)SCN extraction chromatography at 32 degrees before spectroscopic determination. Analysis of one real sample and two synthetic samples gave average recoveries of 80-100%.
Tao
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Hunan Research Institute for Rare Earth Metallurgy, Changsha, Hunan, People's Republic of China.