| Autor: |
Dressler Valderi L., Pozebon Dirce, Flores Éder L. M., Paniz José N. G., Flores Érico M. M. |
| Jazyk: |
angličtina |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Journal of the Brazilian Chemical Society, Vol 14, Iss 2, Pp 334-338 (2003) |
| Druh dokumentu: |
article |
| ISSN: |
0103-5053 |
| Popis: |
A method for the determination of fluoride in coal using pyrohydrolysis for sample decomposition is proposed. An apparatus was constructed, and the influence of vanadium pentoxide (V2O5) as a catalyst for the pyrohydrolysis reaction was investigated. It was verified that V2O5 does not influence the release of fluoride from coal. Certified and non-certified samples were analysed using an ion selective electrode (ISE) for analyte detection. Precise (RSD < 7%) and accurate (recovery in accordance with certified values) results were obtained. The limit of quantification (LOQ) of the method was 5.0 mugF/g of sample, using 20 mg of sample and a final dilution to 10 mL. The sample frequency was 5 samples h-1. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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