This project aims to identify some atmospheric organic compounds that can be considered tracers of specific emissions. We will determine the polycyclic aromatic hydrocarbons and n-alkanes presented in the atmospheric particulate matter collected inside important tunnels and at an urban site in São Paulo City. Some chosen compounds will be important to identify the anthropogenic emissions and other to identify the biogenic emissions. This work is a collaboration project of a larger study: Determinação de perfis de emissão veicular a partir de experimentos em túneis. Programa de Ciência e Tecnologia - CT Transporte. Edital MCT/CNPQ n. 18/2009. Processo: 402383/2009-5 under coordination of Prof. Dr. Paulo Afonso de André - Faculdade de Mediciana - USP.
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