Abstract: Objective:A new method of chemiluminescence for determining the peroxide value in the cooking oils is developed. It is a good method for assaying the peroxide value in the cooking oils. Methods:The method is based on that the peroxide can oxidize iodine ion and the reaction is coupled with the chemiluminescence system luminal-I2. Results:Detection limit of method is 0.0073 mg/L and RSD is lower than 4.50%(n=6). The determination range of the method is between 0～1.0 mg/L. The recovery of the method is between 91.5% and 97.3%. Conclusion:The method can be used to determine the peroxide value in the cooking oils with satisfied results.

Key words: cooking oils, chemiluminescence, peroxide value