Dicarboxylic acid concentration trends and sampling artifacts

被引：48

作者：

Ray, J

McDow, SR ^{[1
]}

机构：

[1] US EPA, Human Exposure & Atmospher Sci Div, Natl Exposure Res Lab, Res Triangle Pk, NC 27711 USA

[2] Drexel Univ, Environm Sci Program, Philadelphia, PA 19104 USA

来源：

ATMOSPHERIC ENVIRONMENT | 2005年 / 39卷 / 40期

关键词：

dicarboxylic acids; secondary organic aerosol; sampling artifacts;

D O I：

10.1016/j.atmosenv.2005.09.024

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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. Published by Elsevier Ltd.

引用

页码：7906 / 7919

页数：14

共 55 条

[1] SAMPLING OF CARBONACEOUS PARTICLES IN THE ATMOSPHERE .2. [J].