MAterial Balance Group (MBG)
MGB is an abbreviation for Material Balance Groups. The MGB variable is a sum of all the species with the same oxidation state. OLI gives this information as Total or for the specific phase requested (Aqueous, Vapor, Solid, and Organic) or as absorbed to the surface. For example, if we have the following system: • 55.5082 moles of H2O • 1 mol of NaCl • 1 mol of CaCl2 • 1 mol of CaCO3 The distribution of the elements with their respective oxidation states are given as MBG for the total system, and for the phases that are predicted to form, as shown in the image below.