Application of spatially resolved NMR spectroscopy for high resolution spectra of heterogeneous samples

An improved method for acquisition of high resolution NMR spectra, exclusiv ely in an arbitrarily chosen volume element of the sample, is presented. Th e proposed pulse sequence utilizes the Double Pulsed Field Gradient Selecti ve Echo (DPFGSE) element, that offers a high selectivity and superior phase and baseline properties of the resulted spectra. The discussed experiment is applicable in all NMR spectrometers, equipped with at least a single-axi s PFG accessory. The effectiveness of the proposed technique is demonstrate d by acquisition of H-1 NMR spectra from different volume elements of a het erogeneous CDCL3/D2O sample.