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

A. P. Sullivan; R. J. Weber; A. L. Clements; J. R. Turner; M. S. Bae; J. J. Schauer

doi:10.1029/2004GL019681

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

A. P. Sullivan
, R. J. Weber
, A. L. Clements
, J. R. Turner
, M. S. Bae
, J. J. Schauer

Research output: Contribution to journal › Article › peer-review

209 Scopus citations

Abstract

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 μg C/m³. 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.

Original language	English
Pages (from-to)	L13105 1-4
Journal	Geophysical Research Letters
Volume	31
Issue number	13
DOIs	https://doi.org/10.1029/2004GL019681
State	Published - Jul 16 2004

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10.1029/2004GL019681

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

abstract = "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 μg C/m3. 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.",

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T2 - Results from an urban site

AU - Sullivan, A. P.

AU - Weber, R. J.

AU - Clements, A. L.

AU - Turner, J. R.

AU - Bae, M. S.

AU - Schauer, J. J.

PY - 2004/7/16

Y1 - 2004/7/16

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AB - 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 μg C/m3. 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.

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

Abstract

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