Estimation of the spin-lattice relaxation time constants of low molecular weight solutes in dilute complex aqueous solutions: application to urinary metabolites

Autor:	Laurance D. Hall, T. Adrian Carpenter, J. J. Attard, Jeeva P. Munasinghe, Lawrence D. Colebrook
Rok vydání:	1998
Předmět:	Aqueous solution Proton Chemistry Relaxation rate Proton NMR Analytical chemistry Spin–lattice relaxation General Materials Science General Chemistry
Zdroj:	Magnetic Resonance in Chemistry. 36:116-123
ISSN:	1097-458X 0749-1581
Popis:	Proton spin–lattice relaxation rate constants (T1 values) of some selected urinary metabolites were analysed extensively by two different least-squares minimization procedures, based on the simplex and the Marquardt–Levenberg algorithms. Comparative multiplicate analysis under different experimental conditions using laboratory solutions of some of the urinary metabolites was employed in addition to direct measurements on human urine samples. The T1 values estimated for most of the metabolites by the two methods agreed to within 10–15%. © 1998 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2458a23f451c08757e8b182c92b10ead https://doi.org/10.1002/(sici)1097-458x(199802)36:2<116::aid-omr236>3.0.co Zobrazit plný text záznamu Plný text