核磁共振关于NMR样品管的知识
How to make an NMR sample
Safety warning: Some of the procedures described here are potentially dangerous. If you are unfamiliar with laboratory safety, please ask a qualified chemist for help.
Samples for full service should be sufficiently soluble in the solvent requested. If not submitting for full service then please prepare your samples as follows.
NMR tubes
Samples for NMR analysis should be submitted in 5 mm NMR tubes [In cases of low solubility or low sensitivity for 13Carbon, 15Nitrogen, 31Phosophorus and 7Lithium NMR it may be desirable to submit samples in 10 mm NMR tubes for 400 MHz analysis. Samples for (39K) potassium and (183W) tungsten NMR may be submitted in 10 mm tubes for 300 MHz analysis.]
Select the right type of NMR tube. For 300 MHz NMR tubes of the quality of Wilmad 507-PP-7, Aldrich series 300 or Kontes grade 3 are sufficient. For 400 MHz NMR use Willmad 528-PP-7, Aldrich series 400 or Kontes grade 6. (For 11B NMR use 528-PP-QTZ. For 10 mm tubes use 513-PP.) If the sample dissolves glass (e.g. HF) use a PTFE insert.
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