Maleic anhydride as a reagent for the determination of hydroxyl groups in organic compounds

The reaction of esterification by maleic anhydride in methyl ethyl ketone i n the presence of triethylamine is proposed for the determination of alcoho l hydroxyl groups. The equivalent amount of maleic anhydride that entered i nto the reaction is determined spectrophotometrically by the reaction with 2-methylimidazole. In the determination of hydroxyl groups in epoxy-dian re sins, maleic anhydride is determined by the potentiometric titration with a lkali after hydrolysis with water by the first potential jump.