| 摘要 |
<p>A flow-through NMR probe having an NMR flow tube that is easily inserted or removed is provided. The NMR flow tube is positioned through a lower and upper insulator in a flow-through NMR probe by the use of a guide tube with a smoothly tapered inner surface. The guide tube leads from the base of the probe to the lower insulator. The NMR flow tube with attached inlet tubing is inserted into the probe through the guide tube and aligned along the central axis of the probe. The flow tube is aligned using upper and lower insulator rings positioned in the upper and lower insulators. Once the NMR flow tube is in place, the outlet end of the flow tube is connected to an outflow tubing with a detachable connector. The lower end of the connector is then seated in a key in the upper insulator ring to position the flow tube for spectral measurements. The invention is useful for applications that couple high performance liquid chromatography (HPLC) with nuclear magnetic resonance spectroscopy (NMR).</p> |
