Glyoxal measurement with a proton transfer reaction time of flight mass 
spectrometer (PTR-TOF-MS): characterization and calibration

Stönner, C.; Derstroff, B.; Klüpfel, T.; Crowley, J. N.; Williams, J.

doi:10.1002/jms.3893

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Glyoxal measurement with a proton transfer reaction time of flight mass spectrometer (PTR-TOF-MS): characterization and calibration

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Stönner, C.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Derstroff, B.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Klüpfel, T.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Crowley, J. N.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Williams, J.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Citation

Stönner, C., Derstroff, B., Klüpfel, T., Crowley, J. N., & Williams, J. (2017). Glyoxal measurement with a proton transfer reaction time of flight mass spectrometer (PTR-TOF-MS): characterization and calibration. Journal of Mass Spectrometry, 52(1), 30-35. doi:10.1002/jms.3893.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-95CA-F

Abstract

We examine the potential for PTR-TOF-MS systems to quantitatively measure glyoxal in ambient air by characterizing the response of the instrument to a dilute glyoxal sample, calibrating the system as a function of humidity. The concentration of glyoxal in a sample air-stream was measured with an UV absorption spectrometer in parallel to a PTR-TOF-MS. This calibration demonstrated that the PTR-TOF-MS has a relatively low sensitivity to glyoxal particularly at high humidity. Extensive fragmentation of glyoxal to formaldehyde was observed. This behaviour not only desensitizes PTR-MS system to glyoxal; it may also pose a problem to the quantification of formaldehyde.