An enhanced procedure for the rapid digestion of high silicate archeological specimens followed by ICP-MS determination of traces of rare earth elements (REE's)

Pillay, A. E. and Punyadeera, C. (2001) An enhanced procedure for the rapid digestion of high silicate archeological specimens followed by ICP-MS determination of traces of rare earth elements (REE's). Journal of Trace and Microprobe Techniques, 19 2: 225-241. doi:10.1081/TMA-100002212


Author Pillay, A. E.
Punyadeera, C.
Title An enhanced procedure for the rapid digestion of high silicate archeological specimens followed by ICP-MS determination of traces of rare earth elements (REE's)
Journal name Journal of Trace and Microprobe Techniques   Check publisher's open access policy
ISSN 0733-4680
Publication date 2001
Sub-type Article (original research)
DOI 10.1081/TMA-100002212
Volume 19
Issue 2
Start page 225
End page 241
Total pages 17
Publisher Marcel Dekker
Language eng
Formatted abstract
A straightforward procedure for the acid digestion of geological samples with SiO2 concentrations ranging between about 40 to 80%, is described. A powdered sample (200 mesh) of 500 mg was used and fused with 1000 mg spectroflux at about 1000°C in a platinum crucible. The molten was subsequently digested in an aqueous solution of HNO3 at 100°C. Several systematic digestion procedures were followed using various concentrations of HNO3. It was found that a relationship could be established between the dissolution-time and acid concentration. For an acid concentration of 15% an optimum dissolution-time of under 4 min was recorded. To verify that the dissolutions were complete, they were subjected to rigorous quality control tests. The turbidity and viscosity were examined at different intervals and the results were compared with that of deionised water. No significant change in either parameter was observed. The shelf-life of each solution lasted for several months, after which time polymeric silicic acid formed in some solutions, resulting in the presence of a gelatinous solid. The method is cost effective and is clearly well suited for routine applications on a small scale, especially in laboratories in developing countries. ICP-MS was applied to the determination of 13 Rare Earth Elements and Hf in a set of 107 archaeological samples subjected to the above digestion procedure. The distribution of these elements was examined and the possibility of using the REE's for provenance studies is discussed.
Keyword high silicate archaeological specimens
digestion procedure
Icp-Ms
Rare Earths
Mngeni River Area
South-Africa
Pottery
Provenance
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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