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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 12
Atmos. Meas. Tech., 10, 4687-4696, 2017
https://doi.org/10.5194/amt-10-4687-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 10, 4687-4696, 2017
https://doi.org/10.5194/amt-10-4687-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 04 Dec 2017

Research article | 04 Dec 2017

Effects of gas–wall partitioning in Teflon tubing and instrumentation on time-resolved measurements of gas-phase organic compounds

Demetrios Pagonis et al.
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Measurements of delays of gas-phase compounds in a wide variety of tubing materials due to gas–wall interactions
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Subject: Gases | Technique: Laboratory Measurement | Topic: Instruments and Platforms
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Effects of gas–wall interactions on measurements of semivolatile compounds and small polar molecules
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Cited articles  
Bian, Q., May, A. A., Kreidenweis, S. M., and Pierce, J. R.: Investigation of particle and vapor wall-loss effects on controlled wood-smoke smog-chamber experiments, Atmos. Chem. Phys., 15, 11027–11045, https://doi.org/10.5194/acp-15-11027-2015, 2015.
Chemours: Teflon FEP fluoroplastic film, available at: https://www.chemours.com/Teflon_Industrial/en_US/assets/downloads/teflon-fep-film-properties.pdf (last access: 6 July 2017), 2016.
de Gouw, J. and Warneke, C.: Measurements of volatile organic compounds in the earth's atmosphere using proton-transfer-reaction mass spectrometry, Mass Spectrom. Rev., 26, 223–257, https://doi.org/10.1002/mas.20119, 2007.
Donahue, N. M., Robinson, A. L., Stanier, C. O., and Pandis, S. N.: Coupled partitioning, dilution, and chemical aging of semivolatile organics, Environ. Sci. Technol., 40, 2635–2643, https://doi.org/10.1021/es052297c, 2006.
Guiochon, G., Felinger, A., Shirazi, D. G., and Katti, A. M.: Fundamentals of Preparative and Nonlinear Chromatography, 1st edn., Elsevier Inc, San Diego, CA, USA, 2006.
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Short summary
Laboratory studies were conducted to investigate gas-wall partitioning of atmospheric organic compounds in Teflon tubing and inside an instrument used to monitor concentrations. Rapid partitioning caused time delays in instrument response that vary with tubing length and diameter, flow rate, and compound volatility. Tubing delay times of seconds to hours were described using a model that also included effects of instrument surfaces. The results can enable better design of air sampling systems.
Laboratory studies were conducted to investigate gas-wall partitioning of atmospheric organic...
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