| 摘要 |
The invention especially relates to a method for analysing, by nuclear magnetic resonance (NMR), at least one sample containing at least one species to be characterised and a reference species, the method comprising the following steps:- acquiring (1330), via one or more antennae, one or more complex free induction decay (FID) signals (S(t)); obtaining (1323) an FID spectrum S(ω) by applying a Fourier transform to the signal S(t), the FID spectrum S(ω) obtained containing two portions (UFR, DFR) each extending from the resonant frequency (F0Ref) of the reference species and on either side of F0Ref, respectively, the frequency of the species to be characterised being located in a spectrum portion selected from said two portions (UFR, DFR); - modelling (1321) the signal Sref(t) of the reference species on the basis of the real and complex parts of the at least one complex FID signal S(t); - obtaining (1322) a spectrum Sref(ω) of the reference species containing only the reference species, by applying a Fourier transform to the model of the signal Sref(t) of the reference species; - obtaining (1324) a modified FID spectrum, Formula (I), by substituting the portion of the FID spectrum S(ω) that does not contain the species to be characterised with the corresponding portion of the spectrum Sref(ω); - applying (1325) an inverse Fourier transform to formula (I) in order to obtain a modified signal Formula (II); and - calculating (1326) the modulus of the modified FID signal Formula (II). |
