A Device for the Removal of Temperature Gradients in NMR Spinning Tubes

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Abstract
A simple paddle device is described for the removal of temperature gradients in liquids contained in high resolution NMR spinning tubes. Experiments show that this accessory reduces temperature gradients to less than 0.10°C along the length of the liquid without any impairment in spectrometer resolution or sensitivity. The device is readily adaptable to most conventional high resolution NMR spectrometers.