QUANTITATIVE-DETERMINATION OF DEHYDROABIETIC ACID METHYL-ESTER IN DISPROPORTIONATED ROSIN

A simple, rapid and accurate capillary gas chromatographic (GC) method for the quantitative determination of dehydroabietic acid in commerci ally disproportionated rosins was developed and tested. Dehydroabietic acid was converted into its methyl ester derivative and quantified by GC with flame ionization detection using a DB-1 column with methyl st earate as the internal standard. The method can also be applied to the quantitation of dehydroabietic acid in rosin or in other rosin deriva tives.