Desuden gælder, at skønt der er fundet tilfredsstillende korrelation mellem Pow og adsorptionen (19), kan det samme ikke siges om forholdet mellem vandopløselighed og adsorptionsgrad (19)(21); undersøgelser heraf har hidtil givet meget modstridende resultater.
In addition, although satisfactory correlations have been found between Pow and adsorption (19), the same cannot be said for the relationship between water solubility and extent of adsorption (19)(21); so far the studies are very contradictory.