Effect of Production Process on Benzo (a) Pyrene Content in Camellia Oil

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 lead to obvious increase in benzo (a) pyrene content in oil, and deodorizing lead to slight increase. But the processes of bleaching and winterization could reduce Benzo (a) pyrene content in the oil to a safety range.