کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4444420 | 1311239 | 2005 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dicarboxylic acid concentration trends and sampling artifacts Dicarboxylic acid concentration trends and sampling artifacts](/preview/png/4444420.png)
Dicarboxylic acids associated with airborne particulate matter were measured during a summer period in Philadelphia that included multiple air pollution episodes. Samples were collected for two 10 h periods each day using a high-volume sampler with two quartz fiber filters in series, and analyzed by gas chromatography mass spectrometry (GCMS) with diazomethane derivatization. Among the dicarboxylic acids investigated, phthalic acid and adipic acid exhibited the greatest diurnal variations and the strongest linear relationship with maximum daily ozone concentration. Dicarboxylic acids and ozone concentration exhibited a poor linear relationship with organic to elemental carbon ratio. All species investigated were affected by significant sampling artifact errors at low concentrations, but sampling errors were negligible at high concentrations observed during ozone episodes.
Journal: Atmospheric Environment - Volume 39, Issue 40, December 2005, Pages 7906–7919