¹³C-qNMR Determination of CO₂ Loading of Potassium Glycine-CO₂ Absorption System

Recycle delay time was set as 50 s on the basis of ¹³C longitudinal relaxation time(1.4-24.6 s) of potassium glycine-CO₂ absorption system obtained with pulse sequence t1irpg. ¹³C-qNMR method was established for determination of CO₂ loading of potassium glycine-CO₂ absorption system with inverse gated decoupling technique (pulse sequence Zgig30). The method was applied to the analysis of several samples, and compared with the traditional titration method. The method has the advantages of high accuracy, environmental friendliness, and the possibility of identifying species change according to chemical shift.