Colorimetric determination of small amounts of C8 to C10 alcohols in their phthalate esters
Abstract
Methods were examined for the determination of small amounts of C8 to C10 alcohols in their phthalate esters involving the use of vanadium 8-hydroxyquinolinate in benzene or toluene and 3,5-dinitrobenzoyl chloride in pyridine as colorimetric reagents. Two modified procedures are presented that will reliably determine free alcohols in the 0·01 to 0·4 per cent. m/m range.