Low Volume Insert for Solid State Magic Angle Spinning NMR (Nuclear Magnetic Resonance) of Small Samples

摘要

Easily machined ceramic inserts with low volume capacities were compared to standard rotors packed completely with samples or with silica gel-diluted samples of adamantane and glycine. A disc shaped sample cavity gave better signal-to-noise than a cylindrically-shaped one for comparable sample size and number of cylindrically-shaped one for comparable sample size and number of scans, and gave the narrower peak widths than even the full rotor. The inserts are inexpensive and easy to use while facilitating high-speed rotor spin-up and recovery of the noncontaminated samples.