Figueroa, David Acevedo Concentrations of Ni and V, other heavy metals, arsenic, elemental and organic carbon in atmospheric fine particles (PM2.5) from Puerto Rico. [electronic resource] - Toxicology and industrial health Mar 2006 - 87-99 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0748-2337 Standard No.: 10.1191/0748233706th247oa doi Subjects--Topical Terms: Air Pollution--analysisArsenic--analysisCarbon--analysisEnvironmental Monitoring--instrumentationGeographyHumansIndustryMetals, Heavy--analysisMultivariate AnalysisNickel--analysisParticle SizeParticulate Matter--analysisPuerto RicoSeasonsSpectrophotometry, AtomicUrban HealthVanadium--analysis