Basicity as a function of water concentration in mixed solvent, dimethysulfoxide-water solution

The pH and pOH functions of, respectively, acid and base are meaningful measures of the acidity of dilute—i.e. up to about one Molar—solitons. Outside this range however, they are almost useless, and the establishment of other measure of acidity is necessary. Unfortunately, the results were far from conclusive, and, if anything opposed to the hypothesis. It seems safe to conclude that the use of aldehydes as an indicator series is prohibited in solution containing DMSO. Too many such indicators are totally barred from usage by its strong absorption below 260 mμ. Even those which were available for study yielded completely unpredicted, and confusing results