2023-Sustainable Industrial Processing Summit
SIPS2023 Volume 10. Torem Intl. Symp/ Mineral Processing
| Editors: | F. Kongoli, G. N. Anastassakis, A. Abhilash, H. R. Kota, A. G. Merma, E. Souza, C.H. Sampaio, R. Souza, M.M. Vellasco, F. Zeballos, J. Sokolovic |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2023 |
| Pages: | 142 pages |
| ISBN: | 978-1-989820-90-2 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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DETERMINATION OF RARE EARTHS AND NON-RARE EARTHS BY INDUCTIVELY COUPLED PLASMA-OPTICAL EMISSION SPECTROMETRY AFTER MICROWAVE DIGESTION
Dhiroshnee Govender1;1SAIPARK CORPORATION (PTY) LTD, Randburg, South Africa;
Type of Paper: Regular
Id Paper: 310
Topic: 5
Abstract:
A rapid microwave preparation method that is a combination of alkali fusion and acid digestion (4.5 h turn-around time) was developed for the determination of REEs (Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Eb, Tm, Yb and Lu) and selected non-REEs ((Ba, Ca, Co, Cu, Fe, Mn, Ni, Sr, Th, Ti, U, V, Zn, Zr) by inductively coupled plasma optical emission spectrometry (ICP-OES). Uranium and Th, although investigated could not be determined by ICP-OES. The aim of this method was to provide cost effective REE and selected non-REE analysis within an acceptable turn-around time to industry. The microwave method of preparation was twin streamed with a manual method entailing alkali fusion and open vessel wet acid digestion on a hotplate. The data from both methods demonstrated comparable recoveries of REEs and non-REEs (between 95 % and 105 %) with an LOQ of 10 mg L-1. The methods were validated using two certified reference materials, CGL 124 and CGL 111.