2004•Physical Testing and Chemical AnalysisRequires access

ICP-AES DETERMINATION OF CO-EXISTING RARE-EARTH IMPURITIES IN HIGH-PURITY EUROPIUM OXIDE

Renjie Dong‬, Ren-xuan Xin

Abstract

ICP-AES method was applied to the determination of 14 rare earth elements present as impurities in high-purity (99.99%) europium oxide. It was found that when the concentration of Eu_2O_3 is larger than 100mg·L~(-1), serious interferences to the determination of other co-existing rare earth metal ions were observed. Separation of the matrix metal Eu ion is necessary and it was removed by an ion-exchange separation using the 5709 resin. Under the optimum condition of the method, the lower limits of the working curves (expressed as oxides in mg·L~(-1)) were La(0.05), Ce?Pr?Gd(0.25), Nd?Sm?Tb?Dy?Ho(0.1),Er?Tm?Yb?Lu?Y(0.05). Recoveries obtained were in the range of 90%～106%.

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Key concepts: Europium, Impurity, Oxide, Rare earth, Metal, Lanthanide, Matrix (chemical analysis), Materials science