Abstract

A method for the spectrographic determination of trace amounts of Eu, La, Y, Nd, Pr, and Sm in the <i>5N</i> HCl solution has been developed. The solution is evaporated on graphite powder and excited in the craters of graphite electrodes in a dc arc using the carrier distillation method CsF is used as the carrier. Excitation is made in the special atmosphere of 80% oxygen and 20% argon. For Y and La, the range of determination is from 0.25 to 10 μg/ml and for Eu, Nd, Pr, and Sm the range is from 0 5 to 20 μg/ml. The average coefficient of variation amounts to ± 10%. It has been found that in the investigated concentration range the influence of some rare earth elements on excitation of the others is negligible. This method can be applied also to the analysis of other rare earth elements.

The Quantitative Spectrographic Analysis of the Rare Earth Elements*I. Determination of Samarium in NeodymiumII. Determination of Europium in Samarium

Velmer A. Fassel and Harley A. Wilhelm
J. Opt. Soc. Am. 38(6) 518-526 (1948)

The Quantitative Spectrographic Analysis of the Rare Earth Elements* III. Determination of Major Constituents in Complex Mixtures

Velmer A. Fassel
J. Opt. Soc. Am. 39(2) 187-193 (1949)

Univariate and multivariate analyses of rare earth elements by laser-induced breakdown spectroscopy

Chet R. Bhatt, Fang Y. Yueh, and Jagdish P. Singh
Appl. Opt. 56(8) 2280-2287 (2017)

Ionization Energies of the Neutral Rare Earths

Joseph Reader and Jack Sugar
J. Opt. Soc. Am. 56(9) 1189-1194 (1966)

Optical constants determination of samarium, holmium, and erbium in the 1.5-850 eV spectral range using a transmittance method

Benjawan Kjornrattanawanich, David L. Windt, and John F. Seely
Appl. Opt. 49(31) 6006-6013 (2010)