A different method is that of Abánades Lázaro, who mathematically analysed many possible scenarios and recommended using the experimental mass ratio between the dehydrated MOF and the residue (Rexp,DH). Then a charge balance is introduced where one has to consider what the missing linkers would be replaced with, so a number of (NLtheo-NLexp) of charge balancing groups can be introduced. From this, charge balance equations can be derived depending on the MOF composition. The SI of the original paper includes several examples, including ZIF-8 and MOF-5. In what follows we will make different guesses for the charge balancing species (OH -and O 2-), as we have no direct information. All results are collected in Table .