Residual Solvent Signal of CDCl<sub>3</sub> as a qNMR Internal Standard for Application in Organic Chemistry Laboratory
作者:Ruslan Muhamadejev、Renate Melngaile、Paula Paegle、Ieva Zibarte、Marina Petrova、Kristaps Jaudzems、Janis Veliks
DOI:10.1021/acs.joc.0c02744
日期:2021.3.5
yield requires the addition of an internal standard to each sample. Herein, we report a method where CDCl3 residual solvent signal is used as an internal standard for qNMR after quantification in the solvent batch. This method significantly simplifies sample preparation and allows straightforward recovery of the analyte by the simple evaporation of the NMR solvent. The accuracy of the method is comparable
核磁共振(NMR)光谱仪是有机合成实验室中用于结构确定,反应控制和化合物纯度分析的关键仪器。除了定性分析外,NMR在定量分析(qNMR)中的应用正日益普及。qNMR可以对粗产物混合物进行简单的定量,反应收率的确定以及有机化合物的纯度。NMR收率的测定需要向每个样品中添加内标。在这里,我们报告一种方法,其中CDCl 3在溶剂批次中定量后,残留的溶剂信号用作qNMR的内标。该方法大大简化了样品制备过程,并通过简单蒸发NMR溶剂即可直接回收分析物。如果遵循本文所述的指导原则,则该方法的准确性与以1,3,5-三甲氧基苯作为内标的qNMR相当。