title: [Determination of rare-earth impurities in ultra-highly pure Er2O3 and Ho2O3 by [HEH(HEP)] extraction chromatography-atomic emission spectrometry].
abstract: This article applied [HEH(HEP)] (2-ethyhexyldrogen-2-ethylhexyl phosphonate) extraction chromatography to separate 14 rare earth impurities from ultra-highly pure Er2O3 and Ho2O3, and then the impurities were determined by atomic emission spectrometry. The average percentage recovery for each element is in the range of 70%-140%. The relative standard deviations of the determination are +/- 3.3%-2.2%. This method can be applied to the determination of the trace amounts of rare eath impurities in Er2O3 and Ho2O3 with a purity of 99.9999%-99.99999%.
authors.affiliation: Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130021 Changchun.
authors.forename: W
authors.initials: W
authors.lastname: Li
authors.forename: C
authors.initials: C
authors.lastname: Peng
authors.forename: P
authors.initials: P
authors.lastname: Yuan
authors.forename: W
authors.initials: W
authors.lastname: Qi
authors.forename: M
authors.initials: M
authors.lastname: Gao
authors.forename: L
authors.initials: L
authors.lastname: Li