1.
Sci Total Environ
; 287(3): 203-12, 2002 Mar 27.
Artigo
em Inglês
| MEDLINE
| ID: mdl-11993963
RESUMO
Levels of atmospheric carboxylic acids in gas and particulate matter were measured at three sites in Mexico City within the month of March 2000. An annular denuder system was used for sampling and the analytical method was HPLC with UV detection. Formic and acetic acids were present in the PM2.5 fraction and in the gas phase. Total concentration of formic acid was between 0 and 7 ppbV and total concentration of acetic acid was between 1 and 17 ppbV. On average 53% of the formic acid and 67% of the acetic acid were present in particulate matter.