To perform the analysis, a sample is placed in filter paper, extracted for 16 hours with acetone or diethylether at reflux conditions using an extraction apparatus and the weight percent of extractables is determined after the solvent is removed. The solvent removes plasticizers, processing aids, organic accelerators or their decomposition products, fatty acids, antioxidants, antiozonants, resins, free sulfur, flame retardants and other organic additives. These additives are identified when ARDL's complete chemical analysis is ordered. The extractable content has to be carried out if the rubber hydrocarbon content (RHC) needs to be determined.