In order to evaluate the effect of different production processes on benzo (a) pyrene content in camellia oil, a comparison in the amounts of benzo (a) pyrene had been made among the crude oils prepared by hot pressing, cold pressing, solvent extraction and aqueous enzymatic extraction. In conclusion, the benzo (a) pyrene content in aqueous enzymatic extracted camellia oil and cold pressing oil can meet the safety need without refining. The major cause of forming excessive benzo (a) pyrene in traditional solvent extracted oil is due to high temperature, rather than solvent. Neutralizing could ...
