Pade–Laplace analysis in the fitting of multi-exponential nuclear magnetic resonance relaxation decay curves

Autor:	N. J. Clayden
Rok vydání:	1992
Předmět:	Nuclear magnetic resonance Laplace transform Chemistry Relaxation (NMR) Padé approximant Similar time Physical and Theoretical Chemistry Noise (electronics) Decay curve Exponential function
Zdroj:	J. Chem. Soc., Faraday Trans.. 88:2481-2486
ISSN:	1364-5455 0956-5000
DOI:	10.1039/ft9928802481
Popis:	Pade–Laplace analysis has been proposed as a method for identifying the number of exponential components in a multi-exponential decay. The usefulness of this method has been examined by computer simulations, for data sets typical of T1ρ measurements in NMR. Emphasis was placed on resolving exponential functions with similar time constants in the presence of experimental noise. For three exponential decays Pade–Laplace analysis was found to be only on a par with non-linear least-squares (NLLS) fitting at identifying the three components. Similarly no improvement was seen in the accuracy of the fitted parameters over those found in NLLS fitting.
Databáze:	OpenAIRE
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