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| Titel |
Determination of alkylamines in atmospheric aerosol particles: a comparison of gas chromatography–mass spectrometry and ion chromatography approaches |
| VerfasserIn |
R.-J. Huang, W.-B. Li, Y.-R. Wang, Q. Y. Wang, W. T. Jia, K.-F. Ho, J. J. Cao, G. H. Wang, X. Chen, I. EI Haddad, Z. X. Zhuang, X. R. Wang, A. S. H. Prévôt, C. D. O'Dowd, T. Hoffmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 7 ; Nr. 7, no. 7 (2014-07-04), S.2027-2035 |
| Datensatznummer |
250115841
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| Publikation (Nr.) |
 copernicus.org/amt-7-2027-2014.pdf |
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| Zusammenfassung |
| In recent years low molecular weight alkylamines have been recognized to
play an important role in particle formation and growth in the lower
atmosphere. However, major uncertainties are associated with their
atmospheric processes, sources and sinks, mostly due to the lack of ambient
measurements and the difficulties in accurate quantification of alkylamines
at trace level. In this study, we present the evaluation and optimization of
two analytical approaches, i.e., gas chromatography–mass spectrometry
(GC-MS) and ion chromatography (IC), for the determination of alkylamines
in aerosol particles. Alkylamines were converted to carbamates through
derivatization with isobutyl chloroformate for GC-MS determination. A set of
parameters affecting the analytical performances of the GC-MS approach,
including reagent amount, reaction time and pH value, was evaluated and
optimized. The accuracy is 84.3–99.1%, and the limits of detection
obtained are 1.8–3.9 pg (or 0.02–0.04 ng m−3). For the IC approach, a
solid-phase extraction (SPE) column was used to separate alkylamines from
interfering cations before IC analysis. 1–2% (v/v) of acetone (or 2–4%
(v/v) of acetonitrile) was added to the eluent to improve the separation of
alkylamines on the IC column. The limits of detection obtained are 2.1–15.9 ng (or 0.9–6.4 ng m−3),
and the accuracy is 55.1-103.4%. The lower
accuracy can be attributed to evaporation losses of amines during the sample
concentration procedure. Measurements of ambient aerosol particle samples
collected in Hong Kong show that the GC-MS approach is superior to the IC
approach for the quantification of primary and secondary alkylamines due to
its lower detection limits and higher accuracy. |
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