X-Ray Spectrometry · 2005 · 18 citations · 14 references
Environmental MonitoringEngineeringAir Pollution MeasurementAir Pollution FiltrationUrban Air QualityAir QualityParticulate MatterEarth ScienceAir Pollution DispersionSocial SciencesEnvironmental ChemistryAtmospheric ScienceAerosol SamplingEnvironmental HealthAir Quality MonitoringMetropolitan AreaPolycarbonate FiltersPixe AnalysisPollutant TransportHazardous PollutantsAerosol FormationMexico CityAtmospheric TransportAir PollutionUrban Climate
Abstract Samples of atmospheric aerosols were collected at three sites in the metropolitan area of Mexico City and analyzed with particle‐induced x‐ray emission (PIXE). Stacked filter units of the Davis design were employed to obtain samples of PM 15 (particles with dimensions below 15 µm mean aerodynamic diameter) on polycarbonate filters, divided in two fractions. The study was conducted during the first half of 2002, exposing the filters every 2 days for 24 h, starting at 08:00 h. Analysis of variance of the measured elemental concentrations showed differences in the mean concentrations for several elements at the sampling sites. Cluster and absolute principal component analyses were applied to identify contributing sources, together with their relative contributions to the mass measured with PIXE. It was found that fugitive dusts are usually the main sources in both fractions from all sites. Copyright © 2005 John Wiley & Sons, Ltd.
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Ursula Ackermann‐Liebrich, P Leuenberger, Joel Schwartz et al. · American Journal of Respiratory and Critical Care Medicine · 1997 · 386 citations
Asthma, Air Quality, Lung Function +18
Álvaro Osornio-Vargas, James C. Bonner, Ernesto Alfaro‐Moreno et al. · Environmental Health Perspectives · 2003 · 291 citations · Full text