Determination of the diffusion constants of dimethylsulfide and dimethylsulfoniopropionate by diffusion-ordered nuclear magnetic resonance spectroscopy

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1016/j.marchem.2018.10.004.

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Authors

Christopher Spiese

Abstract

The diffusion coefficients (D) for both dimethylsulfide (DMSP) and dimethylsulfoniopropionate (DMSP) were determined using diffusion-ordered nuclear magnetic resonance spectroscopy (DOSY). Diffusion coefficients were measured across a temperature range (285 – 315 K, 12 – 42°C) and DDMSP was determined in both artificial seawater (30.5‰) and in MilliQ water (0‰). Diffusion constants were within the range predicted by various empirical models. DDMS was lower than that reported previously, which implies slower sea-to-atmosphere gas transfer. DDMSP was well-predicted by the Stokes-Einstein relation and does not have a strong concentration dependence. Implications for diffusion of DMSP on cellular physiology are discussed, as are implications for sea-to-air transfer of DMS, changing previous rates by approximately 10%.

DOI

https://doi.org/10.31223/osf.io/gd2zy

Subjects

Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

Keywords

diffusion, gas transfer, uptake

Dates

Published: 2018-05-18 10:08

Last Updated: 2018-11-12 11:44

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License

GNU Lesser General Public License (LGPL) 2.1

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