E. Kellenbach et al., Using pulse field gradient NMR-based diffusion experiments to identify signals of low-molecular-weight impurities, ORG PROC R, 3(2), 1999, pp. 141-144
Differences in diffusion rate were utilised to identify signals of low-mole
cular-weight impurities in NMR spectra of synthetic pentasaccharide samples
using NMR pulse field gradients. This method is of general use to discrimi
nate between low-molecular-weight impurities and high-molecular-weight comp
ounds in mixtures.