| Autor: |
Oliveira Pedro V. de, Krug Francisco J., Silva Márcia M., Nóbrega Joaquim A., Queiroz Zilvanir F., Rocha Fábio R. P. |
| Jazyk: |
angličtina |
| Rok vydání: |
2000 |
| Předmět: |
|
| Zdroj: |
Journal of the Brazilian Chemical Society, Vol 11, Iss 2, Pp 136-142 (2000) |
| Druh dokumentu: |
article |
| ISSN: |
0103-5053 |
| Popis: |
The atomization of lead in an electrothermal tungsten coil atomizer in the presence and absence of Na+, K+, Ca2+ and Mg2+ was investigated with the objective of understanding the interference processes. The lead atomization was less affected by Ca2+ and Mg2+ than by Na+ and K+. In the absence of concomitants, lead atomization efficiency was improved by the presence of H2 (10% v/v) in the purge gas composition, during pyrolysis and atomization steps. The interference caused by Na+ and Ca2+ was negligible when the pyrolysis step was accomplished without H2 in the purge gas composition. The results showed that Na+, K+, Ca2+ and Mg2+ are directly involved in competition reactions for H2 in condensed phase. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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