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| Titel |
Development and validation of a portable gas phase standard generation and calibration system for volatile organic compounds |
| VerfasserIn |
P. Veres, J. B. Gilman, J. M. Roberts, W. C. Kuster, C. Warneke, I. R. Burling, J. Gouw |
| 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 ; 3, no. 3 ; Nr. 3, no. 3 (2010-06-16), S.683-691 |
| Datensatznummer |
250001114
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| Publikation (Nr.) |
 copernicus.org/amt-3-683-2010.pdf |
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| Zusammenfassung |
| We report on the development of an accurate, portable, dynamic
calibration system for volatile organic compounds (VOCs). The Mobile
Organic Carbon Calibration System (MOCCS) combines the production of
gas-phase VOC standards using permeation or diffusion sources with
quantitative total organic carbon (TOC) conversion on a palladium
surface to CO2 in the presence of oxygen, and the subsequent
CO2 measurement. MOCCS was validated using three different
comparisons: (1) TOC of high accuracy methane standards compared well
to expected concentrations (3% relative error), (2) a gas-phase
benzene standard was generated using a permeation source and measured
by TOC and gas chromatography mass spectrometry (GC-MS) with excellent
agreement (<4% relative difference), and (3) total carbon
measurement of 4 known gas phase mixtures were performed and compared
to a calculated carbon content to agreement within the stated
uncertainties of the standards. Measurements from laboratory biomass
burning experiments of formic acid by negative-ion proton-transfer
chemical-ionization mass spectrometry (NI-PT-CIMS) and formaldehyde by
proton transfer reaction-mass spectrometry (PTR-MS), both calibrated
using MOCCS, were compared to open path Fourier transform infrared
spectroscopy (OP-FTIR) to validate the MOCCS calibration and were
found to compare well (R2 of 0.91 and 0.99, respectively). |
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