A similar exercise can be done for ZIF-8, an often-used MOF made up of Zn 2+ nodes connected by 2methylimidazolate (MeIm) struts with molecular formula Zn(C4H5N2)2. The TGA shown in Figure shows no appreciable mass loss until the onset of linker degradation. The final plateau, corresponding to ZnO, starts around 500 °C and comes in at 35 % of the initial mass. The digestive qNMR was done in a similar fashion as for MAF-6. Again, a calibration series of 2-MeImH was evaluated and the integration of the signals was used to obtain a calibration curve. The fit is very satisfactory and the fit results are tabulated in Table . . The calibration curve for the aliphatic signal was then used to correct the experimentally obtained ratio MeIm/MA and by further calculations we obtain the values given in Table . Combining the qNMR and TGA data using the equations in the Method section we get a stoichiometry of 1:1.97 Zn:MeIm, which compared to the theoretical 1:2 ratio corresponds to 1.5 % of missing linkers.