AVALIAÇÃO DA EFICIÊNCIA DO MÉTODO TO-15 PARA DETERMINAÇÃO DE COMPOSTOS ORGÂNICOS VOLÁTEIS EM CONDIÇÕES TÍPICAS DE AMBIENTE URBANO
| Autor: | Rafael L. Oliveira, Sergio Machado Corrêa, Luane Lima da Silva, Elaine Cesar C. A. Souza, Cleyton Martins da Silva, Graciela Arbilla |
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| Jazyk: | portugalština |
| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
National park Biogenic emissions aromatic compounds Mineralogy TO-15 method General Chemistry 010501 environmental sciences 01 natural sciences lcsh:Chemistry lcsh:QD1-999 Environmental chemistry volatile organic compounds Environmental science Relative humidity isoprene Vehicular Emissions 0105 earth and related environmental sciences |
| Zdroj: | Química Nova v.39 n.10 2016 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Vol 39, Iss 10, Pp 1245-1253 Química Nova, Volume: 39, Issue: 10, Pages: 1245-1253, Published: DEC 2016 |
| Popis: | The efficiency of U.S.EPA TO-15 Method was evaluated under typical conditions of an urban environment with natural and anthropic emission sources. The performance criteria which should be met for a system to qualify, were fulfilled: a detection limit of ≤0.2 ng for all target compounds, replicate precision for a calibration standard and ambient samples within 20%. The stability of the target compounds during storage of sampled air in canisters was also evaluated at atmospheric pressure and relative humidity of 50%. Results show that, in the sampling conditions, compounds are not stable for more than a week. For validation experiments, samples were collected at the entrance of Tijuca National Park, located at the city of Rio de Janeiro. Isoprene was selected as a marker of biogenic emissions, and aromatic compounds were selected as markers of anthropogenic emissions, primarily vehicular emissions. Then, samples were collected in Saens Peña Square, a central area in the Tijuca District, in the northern part of the city, approximately 10 km from the entrance of Tijuca National Park. Volatile organic compounds were determined and the results were compared with previous data obtained in the same local using other methods. |
| Databáze: | OpenAIRE |
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