Accounting for spin relaxation in quantitative pulse gradient spin echo NMR mixture analysis.
Pulsed gradient spin-echo (PGSE) NMR is intrinsically nonquantitative. Because the experiment is echo-based, differences in the relaxation behavior of the nuclei among the components give rise to varied intensities and lead to nonquantitative spectra. A method is presented that restores resolved, quantitative spectra from mixtures by processing data from several PGSE NMR experiments with varied delay times. The approach incorporates a simple data acquisition scheme and leads to a computationally fast, linear least-squares analysis. It is anticipated the method will be of much interest for performing mixture analysis of polymer solutions and the characterization of surface-modified nanoparticulate dispersions.
Antalek
Brian
B
Research and Development, Eastman Kodak Company, 1999 Lake Avenue, Rochester, NY 14650-2132, USA. brian.antalek@kodak.com
D000465:Algorithms; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D015394:Molecular Structure; D019301:Oleic Acid / Q000737:chemistry; D012680:Sensitivity and Specificity; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry
D019301:Oleic Acid; D015040:Zirconium; C028541:zirconium oxide