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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Matrix-assisted diffusion-ordered spectroscopy: mixture resolution by NMR using SDS micelles

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Autor(es):
Tormena, Claudio F. [1, 2] ; Evans, Robert [1] ; Haiber, Stephan [3] ; Nilsson, Mathias [1] ; Morris, Gareth A. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs - England
[2] Univ Estadual Campinas, Inst Chem, BR-13094971 Sao Paulo - Brazil
[3] Givaudan, Dept Analyt Res, NL-1411 GP Naarden - Netherlands
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Magnetic Resonance in Chemistry; v. 48, n. 7, p. 550-553, JUL 2010.
Citações Web of Science: 59
Resumo

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. (AU)

Processo FAPESP: 09/02736-9 - Aplicação de técnicas de difusão em RMN para separação de misturas complexas
Beneficiário:Claudio Francisco Tormena
Linha de fomento: Bolsas no Exterior - Novas Fronteiras