PH shows the way: Rates of carbonate exchange by two pH-sensitive pathways between aqueous carbonate ion and UO2(CO3)34a??(aq) (see picture) are measured by high-pressure NMR. To accomplish this, a custom pulse sequence is employed to achieve selective inversion. Rates of chemical exchange are determined by modeling the return to equilibrium.
Johnson, R., Harley, S., Ohlin, C. A., Panasci, A., & Casey, W. (2011). Multinuclear NMR study of the pressure dependence for carbonate exchange in the UO2(CO3)34-(aq) ion. ChemPhysChem, 12(16), 2903 - 2906. https://doi.org/10.1002/cphc.201100654