Abstract: This paper studied the rancidity of lard oil in 70±5℃ by CL and general chemical method. There is a correspondence relationship between CL method and general chemical method, and it is probable to detect the quality fo oil & fat by CL method. The CL methd has many advantages, such as simplicity, rapidness, high sensitivity and precise than general chemical method.

Key words: Oil &, fat Autooxidation Chemiluminescence(CL) analysis Peroxide value(POV)；