Abstract : Total migration is one of the basic properties that should be met by food contact materials. It is the total amount of non-volatile substances that can be transported from food contact materials to foods. In this paper, the total migration of the convenient barrel is taken as an example. The test principle of the test, the parameters of the equipment ERT-01 evaporative residue constant weight meter, the scope of use, the test process, etc. are introduced to test the total migration of food contact materials. for reference. Key words: total migration, evaporation residue, evaporation residue, constant weight, migration, instant noodle barrel, food contact material 1 , meaning In recent years, with the emergence of various food safety issues, people are paying more and more attention to the safety of imported foods. The safety of packaging materials and food is directly related to food safety. The domestic food contact material safety standard system is gradually improved, such as the GB 4806 series standard released in 2016. This series of standards specifies the technical requirements for plastic, rubber, paper, metal, ceramic, glass and other products in contact with food. It is one of the technical indicators. Total migration refers to the large allowable amount of non-volatile substances that migrate from food contact materials and products to food simulants in contact with them. These non-volatile substances are derived from the inks and glues used in the packaging production process. Adhesives, resin raw materials, additives, etc. Instant noodle barrel is one of the main packaging forms of instant noodles. Most of them are paper laminating materials. During use, they will be exposed to high temperature and liquid containing certain oil. If the instant noodle barrel contains more migration materials, it will encounter high temperature. When liquids, these substances will migrate to them, affecting the health of the consumer. This article takes a brand of instant noodle packaging with a laminating barrel as the test sample, according to GB 4806.8-2016 "Food Safety National Standard Food Contact Paper and Paperboard Materials and Products" in the test of the total migration amount, the detection of the total migration of the sample to be tested the amount. 2 , test equipment The test equipment used in this test is the ERT-01 evaporation residue constant weight instrument independently developed by Jinan Languang Electromechanical Technology Co., Ltd. Figure 1 ERT-01 evaporation residue constant weight meter 2.1 Test principle According to the product characteristics and temperature conditions encountered during the actual application of the sample, select the appropriate food simulant and test conditions, and make the sample contact with the food simulant according to the specified test method, and put it under the selected test conditions. Migration test. After the end of the migration test, a certain amount of the above-mentioned simulant was placed in the dried evaporating dish, and then evaporated, dried, and weighed in order, and the mass of the obtained residue minus the blank was the total migration amount. 2.2 Equipment parameters 2.3 Scope of application (1) It is suitable for packaging films and containers for food, utensils, medicines, etc. made of polyethylene, polypropylene, polystyrene, etc., and natural rubber as the main raw material, which is used for sealing of bottled and canned foods. Tests on the total migration, evaporation residue, non-volatile content, etc. of food containers, container interior coatings, coating iron sheets, plant fiber food containers, etc., using perchloroethylene resin as the main raw material. (2) It is suitable for the evaporation residue test of chemical reagents which can be volatilized at the boiling water bath temperature and remove the main body. (3) The instrument meets various national standards, such as GB 31604.8 , GB/T 5009.60 , GB/T 5009.64 , GB/T 5009.68 , GB/T 5009.69 , GB/T 5009.203 , GB/T 9740, etc. 3 , test conditions The selected food simulant was n-hexane with a migration condition of 20 °C for 2 h . 4 , the test process (1) Calculate the area of ​​the inner wall and bottom of the instant noodle bucket. (2) Add n-hexane to the sample of the instant noodle barrel to be tested. The distance between the liquid surface of n-hexane and the upper edge of the sample is not more than 1 cm , and the volume of n-hexane added is recorded. (3) The sample was placed in an environment of 20 ° C for 2 h for migration test. (4) After the end of the migration test, 200 mL of the food simulant from the sample was placed in a weighted evaporating dish, and evaporated to dryness on a water bath while performing a blank test. (5) Transfer the evaporating dish to the tray holder of the corresponding number of the evaporation residue constant weight meter, and close the test chamber door. Set parameters such as evaporating dish number, drying temperature, drying time, etc., click the test option to start drying, and automatically weigh the device according to the set drying time. (6) At the end of the test, the device calculates and displays the test results. 5 , test results The total migration of the sample tested was 2.3 mg/dm 2 . 6. Conclusion The total migration is one of the characterizing safety important index food contact materials, this paper by Labthink ERT-01 evaporation residue total constant weight meter test sample migration instant noodles tub in n-hexane was simulated, and the equipment is simple, Highly intelligent, it can accurately test the total migration of samples. Jinan Languang Electromechanical Technology Co., Ltd. is a high-tech enterprise specializing in R&D, production and packaging testing services for packaging testing equipment. It is committed to providing sophisticated and reliable packaging testing equipment and accurate and intimate packaging testing services to customers around the world. The packaging performance of the barrier properties, tensile properties, heat sealing properties, sealing properties, tear properties, smoothness and other performance tests, the more understanding, the more trust! Labthink is looking forward to enhancing technical communication and cooperation with enterprises and institutions in the industry!
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