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Updated: Jul 27, 2026

MALDI Sample Preparation: the Ultra Thin Layer Method
Published on: April 29, 2007
Temperature calibration under ultrafast MAS conditions
Abstract:
For conventional fast magic-angle spinning (MAS) frequencies (=15 kHz), there is a known heating of the sample due to the friction between the rotor and the bearing gas. At the recently achievable ultrafast MAS frequencies of up to 35 kHz, a more dramatic heating effect is expected. Using the 119Sn NMR signal of the chemical shift thermometer Sm2Sn2O7, this frictional heating effect is quantified, and a calibration of the sample temperature under ultrafast MAS conditions is described. An empirical expression is given which allows the determination of the sample temperature as a function of the bearing gas temperature and the spinning frequency. Copyright 1999 Academic Press.

