| Autor: |
Zeiner, Michaela, Burmaa, Dashdenev, Steffan, Ilse |
| Předmět: |
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| Zdroj: |
International Review of Chemical Engineering - Rapid Communications; Mar2010, Vol. 2 Issue 2, p251-255, 5p, 6 Charts |
| Abstrakt: |
Since Rare Earth Elements (REE) play a significant role in modern technology their determination in geological specimens is a matter of high importance. Whereas the quantitative determination by inductively coupled plasma - atomic emission spectrometry (ICP-AES) is already well documented, the sample preparation is still challenging. Thus a microwave assisted digestion was optimized for minerals. Different mixtures of reagents (HNO3, HCl, HClO4, H2O2) and various temperature programs were tested. Microwave assisted digestion did not lead to clear solutions, whereas a following sample preparation step in an open vessel using HClO4 resulted in a complete digestion of the minerals. The supernatant of the former and the solutions obtained by the latter sample preparation were analyzed for their REE contents by ICP-AES. No statistically significant differences were found. Thus a single microwave assisted digestion step is sufficient for the determination of REE in synchysite ore. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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