A method for on-line measurement of water-soluble organic carbon in ambient aerosol particles: Results from an urban site

被引：206

作者：

Sullivan, AP ^{[1
]}

Weber, RJ

Clements, AL

Turner, JR

Bae, MS

Schauer, JJ

机构：

[1] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA

[2] Washington Univ, St Louis, MO 63130 USA

[3] Univ Wisconsin, Water Sci & Engn Lab, Madison, WI 53706 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 13期

关键词：

D O I：

10.1029/2004GL019681

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

An instrument for on-line continuous measurement of the water-soluble organic carbon (WSOC) component of aerosol particles is described and results from an urban site in St. Louis are presented. A Particle-into-Liquid Sampler impacts ambient particles, grown to large water droplets, onto a plate and then washes them into a flow of purified water. The resulting liquid is filtered and the carbon content quantified by a Total Organic Carbon analyzer providing continuous six-minute integral measurements with a detection limit of 0.1 mug C/m(3). Summer and fall measurements of WSOC and organic carbon (OC) indicated WSOC/OC ratio typically ranged from 0.40 to 0.80. A diurnal variation in WSOC/OC that correlated with ozone was observed over extended periods in June; however, other periods in August had no correlation. The results suggested that WSOC was composed of a complex mixture of compounds that may contain a significant fraction from secondary organic aerosol formation.

引用

页码：L131051 / 4

页数：4

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