Ambiental volatile organic compounds in the megacity of São Paulo

Química Nova

Universidade de São Paulo, São Paulo, Brasil¹  Albuquerque, Édler Lins de¹  Andrade, Maria de Fátima¹  Martins, Leila Droprinchinski¹  Tomaz, Edson¹  Ynoue, Rita Yuri¹  Universidade Estadual de Campinas, Campinas, Brasil¹  Vasconcellos, Pérola de Castro¹ 

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 characterize the composition of the main urban air organic compounds in the megacity of Sao Paulo, analysis of samples collected during the winter of 2003 downtown was carried out. The samplings were performed on the roof of a building in the commercial center of São Paulo. Hydrocarbons and carbonyls compounds were collected on August 4, 5 and 6. Comparing to previous data, the concentration of hydrocarbons presented no decrease in the concentration, except for the aldehydes, which decreased when compared to previous data. Among the HCs species analyzed, the highest 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】

Unknown