| Autor: |
Flores Érico M. M., Paniz José Neri G., Saidelles Ana Paula F., Barin Juliano S., Dressler Valderi L., Müller Edson I., Costa Adilson B. |
| Jazyk: |
angličtina |
| Rok vydání: |
2004 |
| Předmět: |
|
| Zdroj: |
Journal of the Brazilian Chemical Society, Vol 15, Iss 2, Pp 199-204 (2004) |
| Druh dokumentu: |
article |
| ISSN: |
0103-5053 |
| Popis: |
A new device for the direct solid analysis by flame atomic absorption spectrometry was investigated as an alternative technique for the determination of trace elements in coal. The potential application of the proposed procedure for the determination of manganese was investigated. Ground coal test samples were weighed directly into polyethylene vials and carried as a dry aerosol to a slotted quartz vaporization cell placed between the flame burner and optical path. The transient signals obtained were totally integrated in 1 second. The effect of operating conditions on the analytical signal was investigated. Background signals were always low and a Mn characteristic mass of 1.9 ng was found. Results were considered satisfactory regarding to both accuracy (between 97.5 and 103.2%) and precision (RSD better than 6%). The proposed system is simple and can be easily adapted to any conventional atomic absorption spectrometers allowing the analysis of more than 80 test samples in an hour. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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