Microseparations of cesium and barium in glass |
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Authors: | Jennifer L Steeb Carol J Mertz Giselle Sandi Dean A Bass Donald G Graczyk Margaret M Goldberg |
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Institution: | (1) Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA |
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Abstract: | A chemical micro-separation of Cs and Ba in complex glass with a high lanthanide content is presented. High purity silica,
with and without Cs and Ba fortification, was subjected to identical dissolution, microseparation, and analysis as a control
glass matrix. Dissolution was performed with hot concentrated nitric and hydrofluoric acids followed by fluoride complexation
with boric acid, evolution of excess boric acid as methyl borate, and finally conversion to soluble nitrate species in 3 M
nitric acid. Separation was performed with a miniature gas pressurized extraction chromatography system using a column packed
with Eichrom Sr resin™. High purity 3 M nitric acid was used to rinse Cs through the column and high purity 1% acetic acid was used to strip Ba
from the resin. Quantitative recovery of both Cs (99.5 ± 0.7%) and Ba (99.1 ± 2.0%) was achieved in the lanthanide glass matrix
and no statistically significant difference was observed in Cs or Ba recovery in the control high purity silica. |
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