[Determination of 14 rare earth impurities in Y2O3 by petroleum sulfoxide extraction chromatography].
Petroleum sulfoxide-NH4SCN extraction chromatography was developed for the separation of Y from other rare earth elements. Some chromatographic parameters were chosen and separation factors between Y and other rare earth elements were determined. A column of resin coated with petroleum sulfoxide was used. The Y in the sample was eluted with NH4SCN, then titrated with EDTA. The recovery was 67%-120% and relative standard deviation +/- 4.0%-19.4%. This method can be applied to the determination of trace amounts of rare earth impurities in Y2O3 with a purity of 99.9999%-99.99999%.
Li
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Changchun Institute of Applied Chemistry, Academia Sinica, 130021 Changchun.
Peng
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C
Yuan
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Qi
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