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Intercomparison of the measurements of oxalic acid in aerosols by gas chromatography and ion chromatography

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Title: Intercomparison of the measurements of oxalic acid in aerosols by gas chromatography and ion chromatography
Authors: Kawamura, Kimitaka Browse this author
Barrie, Leonard A. Browse this author
Toom-Sauntry, Desiree Browse this author
Keywords: Oxalic acid
Gas chromatography
Ion chromatography
Issue Date: Dec-2010
Publisher: Elsevier
Journal Title: Atmospheric Environment
Volume: 44
Issue: 39
Start Page: 5316
End Page: 5319
Publisher DOI: 10.1016/j.atmosenv.2010.08.051
Abstract: Oxalate, the anion of oxalic acid, is one of the most abundant measurable organic species in atmospheric aerosols. Traditionally, this bifunctional species has been measured by gas chromatography (GC) after derivatization to butyl ester and by ion chromatography (IC) without derivatization. However, there are few published comparisons of the two techniques. Here, we report the results of an intercomparison study for the measurement of oxalic acid in Arctic aerosols (<2.5 μm, n = 82) collected in 1992 using GC and IC. The concentrations of oxalic acid by GC ranged from 6.5-59.1 ng m^[-3] (av. 26.0 ng m^[-3], median 26.2 ng m^[-3]) whereas those by IC ranged from 6.6-52.1 ng m^[-3] (av. 26.6 ng m^[-3], median 25.4 ng m^[-3]). They showed a good correlation (r = 0.84) with a slope of 0.96. Thus, observations of oxalate obtained by GC employing dibutyl esters are almost equal to those by IC. Because the accuracy of oxalic acid by GC method largely depends on the method used, it is important to strictly examine the recovery in each study.
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 河村 公隆

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