Issue 43, 2016

Absorption spectroscopy for the quantitative prediction of lanthanide concentrations in the 3LiCl–2CsCl eutectic at 723 K

Abstract

The absorption spectra of single-component mixtures of erbium(III) chloride, holmium(III) chloride, neodymium(III) chloride, praseodymium(III) chloride, samarium(III) chloride and thulium(III) chloride were obtained in the molten salt eutectic 3LiCl–2CsCl at 723 K and were collected at various concentrations from 0 mM to approximately 200 mM (above which the solutions became saturated). Using these data and Beer's law, the molar absorptivities of the absorption bands for each lanthanide(III) chloride were obtained. More sophisticated analysis of the data was completed by building multivariate regression models based on spectra of single-component samples for each lanthanide metal studied. These models were then applied to the measurement/prediction of lanthanide(III) concentrations in a validation set comprised of complex multi-component mixtures within the molten-salt solution. The models performed well despite the complexity of the solutions/spectra. Overall, this work presents the UV-vis Beer's law characterization of several lanthanides as well as successful application of multivariate analysis to the measurement/prediction of lanthanide concentrations in molten salts. This represents a significant improvement for materials analysis techniques, applicable for nuclear fuel pyroprocessing methods.

Graphical abstract: Absorption spectroscopy for the quantitative prediction of lanthanide concentrations in the 3LiCl–2CsCl eutectic at 723 K

Supplementary files

Article information

Article type
Paper
Submitted
27 mai 2016
Accepted
23 août 2016
First published
13 sept. 2016

Anal. Methods, 2016,8, 7731-7738

Absorption spectroscopy for the quantitative prediction of lanthanide concentrations in the 3LiCl–2CsCl eutectic at 723 K

C. A. Schroll, A. M. Lines, W. R. Heineman and S. A. Bryan, Anal. Methods, 2016, 8, 7731 DOI: 10.1039/C6AY01520D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements