| SETTING UP YOUR EXPERIMENT | ||||
| Check sample spinning. | ||||
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Samples for NMR analaysis are spun during data acquisition in order to average out any spatial variations. This only applies to gradients across the tube; variations along the tube axis (such as layers of differing concentration) are not averaged by this type of spinning. In order to make certain that the sample spins stably, insure that the sample level is correct (2-3 inches), that the outside of the tube is clean and dry, and that the spinner turbine is properly positioned, as shown below: |
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| Spinning is controlled by a flow of air (or nitrogen) against the angled surfaces of the turbine top. The black-and-white stripes are optical indicators used to measure the speed of rotation; this is the procedure designated by "ro acqu". | ||||
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