Journal
MAGNETIC RESONANCE IN CHEMISTRY
Volume 48, Issue 7, Pages 550-553Publisher
WILEY
DOI: 10.1002/mrc.2621
Keywords
NMR; H-1; DOSY; surfactant; micelle
Funding
- Engineering and Physical Sciences Research Council [EP/E057888/1, EP/E05899X]
- Givaudan Strategic Research Fund
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/02736-9]
- Engineering and Physical Sciences Research Council [EP/E057888/1, EP/E05899X/1] Funding Source: researchfish
- EPSRC [EP/E057888/1, EP/E05899X/1] Funding Source: UKRI
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/02736-9] Funding Source: FAPESP
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Diffusion-ordered spectroscopy (DOSY) is a powerful technique for mixture analysis, but in its basic form it cannot separate the component spectra for species with very similar diffusion coefficients. It has been recently demonstrated that the component spectra of a mixture of isomers with nearly identical diffusion coefficients (the three dihydroxybenzenes) can be resolved using matrix-assisted DOSY (MAD), in which diffusion is perturbed by the addition of a co-solute such as a surfactant [R. Evans, S. Haiber, M. Nilsson, G. A. Morris, Anal. Chem. 2009, 81, 4548-4550]. However, little is known about the conditions required for such a separation, for example, the concentrations and concentration ratios of surfactant and solutes. The aim of this study was to explore the concentration range over which matrix-assisted DOSY using the surfactant SDS can achieve diffusion resolution of a simple model set of isomers, the monomethoxyphenols. The results show that the separation is remarkably robust with respect to both the concentrations and the concentration ratios of surfactant and solutes, supporting the idea that MAD may become a valuable tool for mixture analysis. Copyright (C) 2010 John Wiley & Sons, Ltd.
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