Articles | Volume 16, issue 21
https://doi.org/10.5194/amt-16-5261-2023
https://doi.org/10.5194/amt-16-5261-2023
Research article
 | 
08 Nov 2023
Research article |  | 08 Nov 2023

Measurements of volatile organic compounds in ambient air by gas-chromatography and real-time Vocus PTR-TOF-MS: calibrations, instrument background corrections, and introducing a PTR Data Toolkit

Andrew R. Jensen, Abigail R. Koss, Ryder B. Hales, and Joost A. de Gouw

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Latest update: 18 Jun 2024
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Short summary
Quantification of a wide range of volatile organic compounds by proton-transfer-reaction mass spectrometry (PTR-MS) can be achieved with direct calibration of only a subset of compounds, characterization of instrument response, and simple reaction kinetics. We characterized our Vocus PTR-MS and developed a toolkit as a guide through this process. A catalytic zero air generator provided the lowest detection limits, and short, frequent calibrations informed variability in instrument response.