Comparação de duas metodologias de amostragem atmosférica com ferramenta estatística não paramétrica
In atmospheric aerosol sampling, it is inevitable that the air that carries particles is in motion, as a result of both externally driven wind and the sucking action of the sampler itself. High or low air flow sampling speeds may lead to significant particle size bias. The objective of this work is the validation of measurements enabling the comparison of species concentration from both air flow sampling techniques. The presence of several outliers and increase of residuals with concentration becomes obvious, requiring non-parametric methods, recommended for the handling of data which may not be normally distributed. This way, conversion factors are obtained for each of the various species under study using Kendall regression.
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| Auteurs principaux: | , , , , |
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| Format: | Digital revista |
| Langue: | Portuguese |
| Publié: |
Sociedade Brasileira de Química
2005
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| Accès en ligne: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000200002 |
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