Articles | Volume 15, issue 4
Ocean Sci., 15, 925–940, 2019
https://doi.org/10.5194/os-15-925-2019
Ocean Sci., 15, 925–940, 2019
https://doi.org/10.5194/os-15-925-2019

Research article 16 Jul 2019

Research article | 16 Jul 2019

Segmented flow coil equilibrator coupled to a proton-transfer-reaction mass spectrometer for measurements of a broad range of volatile organic compounds in seawater

Charel Wohl et al.

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Cited articles

Andrews, S. J., Hackenberg, S. C., and Carpenter, L. J.: Technical Note: A fully automated purge and trap GC-MS system for quantification of volatile organic compound (VOC) fluxes between the ocean and atmosphere, Ocean Sci., 11, 313–321, https://doi.org/10.5194/os-11-313-2015, 2015. 
Arévalo-Martínez, D. L., Beyer, M., Krumbholz, M., Piller, I., Kock, A., Steinhoff, T., Körtzinger, A., and Bange, H. W.: A new method for continuous measurements of oceanic and atmospheric N2O, CO and CO2: performance of off-axis integrated cavity output spectroscopy (OA-ICOS) coupled to non-dispersive infrared detection (NDIR), Ocean Sci., 9, 1071–1087, https://doi.org/10.5194/os-9-1071-2013, 2013. 
Beale, R., Liss, P. S., and Nightingale, P. D.: First oceanic measurements of ethanol and propanol, Geophys. Res. Lett., 37, 1–5, https://doi.org/10.1029/2010GL045534, 2010. 
Beale, R., Liss, P. S., Dixon, J. L., and Nightingale, P. D.: Quantification of oxygenated volatile organic compounds in seawater by membrane inlet-proton transfer reaction/mass spectrometry, Anal. Chim. Acta, 706, 128–134, https://doi.org/10.1016/j.aca.2011.08.023, 2011. 
Beale, R., Dixon, J. L., Arnold, S. R., Liss, P. S., and Nightingale, P. D.: Methanol, acetaldehyde, and acetone in the surface waters of the Atlantic Ocean, J. Geophys. Res.-Oceans, 118, 5412–5425, https://doi.org/10.1002/jgrc.20322, 2013. 
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Short summary
In this paper we present a gas equilibrator that can be used to equilibrate gases continuously or in discrete samples from seawater into a carrier gas. The headspace is analysed by a commercially available proton-transfer-reaction mass spectrometer. This allows for the measurement of a broad range of dissolved gases up to a very high solubility in seawater. The main advantage of this equilibrator is its unique design and ease of reproducibility.