外标法NMR实验中化学位移的校正

The Calibration of Chemical Shift in NMR Experiments by External Standards

推导了 NMR实验中任意条件下柱状介质所感受到的有效磁场和固有化学位移的公式 ,概括了通过单谱仪、双谱仪和魔角实验校正化学位移的方法 ,阐述了平行场和垂直场中的介质磁化率效应。

The valid magnetic field and the formula of inherent chemical shift in colunm medium under arbitrary conditions for NMR experiments were deduced.The chemical shift calibrations with single-spectrum,double-spectrum and magic-angle experiments were summarized.The medium magnetic effects in parallel and vertical magnetic fields were discussed in detail.