Research On Market Parameters Of Dietary Exposure Assessment Of Major Food Contact Materials In China

Objective:Through market research,the distribution of the basic parameter S/V(that is,the ratio of the surface area of food contact materials to the unit mass)of dietary exposure assessment of major food contact materials in China was understood,which provided a reference basis for the subsequent construction of a food safety risk assessment model suitable for food contact materials in China,and provided data support for the revision of national food safety standards related to food contact materials in the future.Methods:The samples with high consumption of residents covered in the market are collected through market sampling,the surface area of food contact materials is measured by 3D surface area measurement method and direct measurement method,and the food contact materials are measured by infrared spectrometer.Through the above sample collection,measurement,and then use the contact area method to calculate the S/V value of China’s main food contact materials.Results:A total of 1906 samples were investigated,and the main food contact materials in China mainly involved 12 materials such as polyethylene,polyethylene terephthalate,polypropylene,and glass.The ratio of surface area to unit mass(S/V)of food contact materials is 819.69 dm~2/kg at maximum and 0.40 dm~2/kg at minimum.In this survey,87.51%of the S/V data of food contact materials were higher than 6 dm~2/kg,and 12.22%of the data were less than 6 dm~2/kg,among which the S/V data of PA66,PC,PMMA,PA66 composite and PA materials were higher than 6 dm~2/kg.Conclusion:Reminder:The S/V=6dm~2/kg in GB 31604.1-2015"National Food Safety Standard-General Principles for Migration Testing of Food Contact Materials and Products"may not be applicable to the existing food testing standards,and there may be underestimation or overestimation of risks.Since the S/V of different food types and non-food contact materials is very different,it is recommended that when the GB 31604.1-2015"National Food Safety Standard-General Principles for Migration Test of Food Contact Materials and Products"is revised in the future,the assessment parameters can be classified and listed,so that the assessment is more scientific.The basic parameters of China’s main food contact materials constructed based on market research can provide data support for the safety assessment of China’s main food contact materials.