| 摘要 |
Disclosed is a reference material for NMR, including a nitrogen-containing compound or oxygen-containing compound and a reagent for shifting a chemical shift for the nitrogen-containing compound or oxygen-containing compound. Disclosed is a sample tube for NMR, being obtainable by providing a reference material for NMR to a first tube closed at one end, providing a second tube closed at one end into the first tube, and fusing the other end of the first tube and the other end of the second tube and sealing a gap between the other end of the first tube and the other end of the second tube. |
