Application of immobilized free radicals in supercritical fluid chromatography hyphenated with proton nuclear magnetic resonance spectroscopy

摘要

Immobilized free radicals were synthesized and used to shorten the spin-lattice relaxation times of analytes in the hyphenation of supercritical fluid chromatography (SFC) with proton high-field nuclear magnetic resonance spectroscopy (NMR). The effect of the immobilized free radicals was studied for the first time under online SFC-NMR coupling conditions. With this method it was possible to obtain integratable NMR spectra in on-line continuous-flow SFC-H-1 NMR spectroscopy. Copyright (C) 2000 John Wiley & Sons, Ltd. [References: 23]