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目的建立食品塑料包装材料中限用紫外吸收剂(UV-0、UV-9、UV-71、UV-326、UV-327、UV-234)和抗氧化剂(2246、425、TH-1790、3114和1076)迁移量的超高效液相色谱(ultra performance liquid chromatography,UPLC)测定方法。方法优化仪器条件及模拟液萃取条件,考察超纯水、3%乙酸水(V:V)溶液、10%乙醇水(V:V)溶液及95%乙醇水(V:V)溶液等4种食品模拟物中紫外吸收剂和抗氧化剂的迁移量,并将建立的方法用于市售样品迁移量的检测。结果 11种目标物质在相应的浓度范围内线性关系良好,相关系数r~2大于0.9992,方法检出限为0.5~2.0 mg/L;平均加标回收率为81.2%~113.2%,相对标准偏差(n=6)为2.8%~8.5%。结论该检测方法灵敏、准确,满足欧盟指令(EU)No.10/2011和GB 9685-2008对食品塑料接触材料及制品中紫外吸收剂和抗氧化剂特定迁移量(SML)的限量要求,适用于食品塑料包装材料中紫外吸收剂和抗氧化剂的迁移量的测定。
OBJECTIVE To establish the UV absorbers (UV-0, UV-9, UV-71, UV-326, UV-327, UV- 234) and antioxidants (2246,425, TH-1790,3114 And 1076) by ultra performance liquid chromatography (UPLC). Methods The instrument conditions and extraction conditions of simulated liquid were optimized. The effects of ultrapure water, 3% acetic acid water (V: V) solution, 10% ethanol water solution and 95% ethanol water solution Migration of UV absorbers and antioxidants in food simulants and the established method was used to detect the amount of migration of commercially available samples. Results The linearity of the 11 target compounds in the corresponding concentration range was good with the correlation coefficient r ~ 2 greater than 0.9992 and the detection limit of 0.5 ~ 2.0 mg / L. The average recoveries were 81.2% -113.2%, and the relative standard deviations (n = 6) was 2.8% ~ 8.5%. Conclusion The method is sensitive and accurate and meets the requirements of European Union Directive (EU) No.10 / 2011 and GB 9685-2008 for the specific migration (SML) of UV absorbers and antioxidants in food plastic contact materials and articles. It applies to Determination of migration of UV absorbers and antioxidants in food plastic packaging materials.