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Price HC, Mattsson J, Murray BJ. Sucrose diffusion in aqueous solution. Phys Chem Chem Phys. 2016;18(28):19207-16doi: 10.1039/c6cp03238a.
Price, H. C., Mattsson, J., & Murray, B. J. (2016). Sucrose diffusion in aqueous solution. Physical chemistry chemical physics : PCCP, 18(28), 19207-16. https://doi.org/10.1039/c6cp03238a
Price, Hannah C, et al. "Sucrose diffusion in aqueous solution." Physical chemistry chemical physics : PCCP vol. 18,28 (2016): 19207-16. doi: https://doi.org/10.1039/c6cp03238a
Price HC, Mattsson J, Murray BJ. Sucrose diffusion in aqueous solution. Phys Chem Chem Phys. 2016 Jul 28;18(28):19207-16. doi: 10.1039/c6cp03238a. Epub 2016 Jul 01. PMID: 27364512; PMCID: PMC5044753.
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Phys Chem Chem Phys. 2016 Jul 28;18(28):19207-16. doi: 10.1039/c6cp03238a. Epub 2016 Jul 01.

Sucrose diffusion in aqueous solution.

Physical chemistry chemical physics : PCCP

Hannah C Price, Johan Mattsson, Benjamin J Murray

Affiliations

  1. School of Earth and Environment, University of Leeds, Leeds, UK. [email protected].

PMID: 27364512 PMCID: PMC5044753 DOI: 10.1039/c6cp03238a

Abstract

The diffusion of sugar in aqueous solution is important both in nature and in technological applications, yet measurements of diffusion coefficients at low water content are scarce. We report directly measured sucrose diffusion coefficients in aqueous solution. Our technique utilises a Raman isotope tracer method to monitor the diffusion of non-deuterated and deuterated sucrose across a boundary between the two aqueous solutions. At a water activity of 0.4 (equivalent to 90 wt% sucrose) at room temperature, the diffusion coefficient of sucrose was determined to be approximately four orders of magnitude smaller than that of water in the same material. Using literature viscosity data, we show that, although inappropriate for the prediction of water diffusion, the Stokes-Einstein equation works well for predicting sucrose diffusion under the conditions studied. As well as providing information of importance to the fundamental understanding of diffusion in binary solutions, these data have technological, pharmaceutical and medical implications, for example in cryopreservation. Moreover, in the atmosphere, slow organic diffusion may have important implications for aerosol growth, chemistry and evaporation, where processes may be limited by the inability of a molecule to diffuse between the bulk and the surface of a particle.

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