| Autor: |
Smirnova, E. V., Mysovskaya, I. N., Lozhkin, V. I., Sandimirova, G. P., Pakhomova, N. N., Smagunova, A. A. |
| Předmět: |
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| Zdroj: |
Journal of Applied Spectroscopy; Nov2006, Vol. 73 Issue 6, p911-917, 7p, 3 Charts, 3 Graphs |
| Abstrakt: |
For the Element2 (a relatively new high-sensitivity magnetic sector ICP MS), we have studied spectral interferences from barium arising as a result of polyatomic barium ions, which have a considerable effect on the intensity of lines for rare-earth isotopes. We have shown that the parameters characterizing the interferences (the ratios of the signals from oxygen-containing, chlorine-containing, and fluorine-containing BaX+ ions to the Ba+ signal, and the apparent rare-earth concentrations Capp j resulting when overlap from polyatomic Ba occurs) are higher for the Element2 than for a quadrupole instrument (PQ2+). However, it is possible to solve many spectral overlap problems when using the Element2 by using the medium-resolution (MR) or high-resolution (HR) modes. We have estimated the resolutions needed to completely separate the masses of the polyatomic barium ions and the rare-earth isotopes in the spectrum. For cases when it is impossible to use the high-resolution mode due to the ∼100-fold decrease in sensitivity, we recommend preliminary separation of Ba from the rare earths. In this work, we have used extraction chromatography to determine low rare-earth concentration levels in Lake Baikal water. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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