Articles | Volume 14, issue 1
https://doi.org/10.5194/amt-14-133-2021
https://doi.org/10.5194/amt-14-133-2021
Research article
 | 
07 Jan 2021
Research article |  | 07 Jan 2021

An in situ gas chromatograph with automatic detector switching between PTR- and EI-TOF-MS: isomer-resolved measurements of indoor air

Megan S. Claflin, Demetrios Pagonis, Zachary Finewax, Anne V. Handschy, Douglas A. Day, Wyatt L. Brown, John T. Jayne, Douglas R. Worsnop, Jose L. Jimenez, Paul J. Ziemann, Joost de Gouw, and Brian M. Lerner

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AR by Megan Claflin on behalf of the Authors (19 Nov 2020)  Author's response   Manuscript 
ED: Publish as is (20 Nov 2020) by Hendrik Fuchs
AR by Megan Claflin on behalf of the Authors (20 Nov 2020)
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Short summary
We have developed a field-deployable gas chromatograph with thermal desorption preconcentration and detector switching between two high-resolution mass spectrometers for in situ measurements of volatile organic compounds (VOCs). This system combines chromatography with both proton transfer and electron ionization to offer fast time response and continuous molecular speciation. This technique was applied during the 2018 ATHLETIC campaign to characterize VOC emissions in an indoor environment.