As an efficient and economical method for microbial sterilization, inhibition of plant germination, and extension of food shelf life, irradiation technology has been widely used in the fields of food, medicine, and agricultural products. However, like genetically modified foods, the effects of irradiated foods and drugs on the human body are still unknown.For the long-term consideration of food and drug safety, developed countries such as Europe, America, and Japan have long strengthened their supervision of irradiated food and drugs. In China, with the increasing public awareness of food safety and the government's attention, food and drug regulatory authorities have also begun to strengthen their supervision of irradiated food and drugs to prevent irreversible consequences caused by the abuse of irradiation technology in the future.

There are currently several methods that can effectively identify irradiated food and drugs, among which the most widely used areyesPSLLight induced luminescence method (photoluminescence method). This method has very low requirements for sample pretreatment; No need for chemical reagents, will not cause environmental pollution; Fast measurement,60The result can be given in seconds; Easy to operate, with low requirements for personnel's professional level.PSLMethod is one of the EU standard methods（EN13751）It has also been equivalently adopted by domestic standards in many countries, including China.