Ambiental volatile organic compounds in the megacity of São Paulo

Quimica nova

Albuquerque, Édler Lins de¹  Tomaz, Edson¹  Martins, Leila Droprinchinski²  Andrade, Maria de Fátima²  Ynoue, Rita Yuri²  Vasconcellos, Pérola de Castro² 

[1] Universidade Estadual de Campinas, Campinas, Brasil;Universidade de São Paulo, São Paulo, Brasil

关键词: hydrocarbons;    vehicular emission;    urban air quality.;   

DOI  :  10.1590/S0100-40422008000800018

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In order to characterizethe composition of the main urban air organic compounds in the megacity of SaoPaulo, analysis of samples collected during the winter of 2003 downtown wascarried out. The samplings were performed on the roof of a building in the commercialcenter of São Paulo. Hydrocarbons and carbonyls compounds were collectedon August 4, 5 and 6. Comparing to previous data, the concentration of hydrocarbonspresented no decrease in the concentration, except for the aldehydes, whichdecreased when compared to previous data. Among the HCs species analyzed, thehighest concentrations observed were those of toluene (7.5 ± 3.4 ppbv),n-decane (3.2 ± 2.0 ppbv), benzene (2.7 ± 1.4 ppbv) and 1,3,5-trimethylbenzene(2.2 ± 1.5 ppbv).

【 授权许可】

CC BY