NMR Tube
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An NMR tube is a thin glass walled tube used to contain samples in nuclear magnetic resonance spectroscopy. Typically NMR tubes come in 5 mm diameters but 10 mm and 3 mm samples are known. It is important that the tubes are uniformly thick and well-balanced to ensure that NMR tube spins at a regular rate (i.e. that they do not wobble), usually about 20 Hz in the NMR spectrometer. Usually, only a small sample is dissolved in an appropriate solvent. For 1H NMR experimen...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An NMR tube is a thin glass walled tube used to contain samples in nuclear magnetic resonance spectroscopy. Typically NMR tubes come in 5 mm diameters but 10 mm and 3 mm samples are known. It is important that the tubes are uniformly thick and well-balanced to ensure that NMR tube spins at a regular rate (i.e. that they do not wobble), usually about 20 Hz in the NMR spectrometer. Usually, only a small sample is dissolved in an appropriate solvent. For 1H NMR experiments, this will usually be a deuterated solvent such as CDCl3. Sufficient solvent should be used in order to fill the tube by 4-5 cm (depending on the spectrometer). Protein NMR is usually performed in a 90% H2O (or buffer)/10% D2O mixture. The sample may be sonicated or agitated to aid dissolution, and solids are removed via filtering through a plug of celite in a Pasteur pipette, directly into the NMR tube.
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