全氟和多氟烷基化合物(per- and polyfluoroalkyl substances,PFAS)从食品包装用纸向食品的迁移风险持续存在,但PFAS物质的检测方法复杂且费时,现有管控体系仍面临挑战。该研究初步验证了24种PFAS与总氟(total fluorine,TF)及可提取有机氟(extractable organic fluorine,EOF)含量之间的关系,通过对24种PFAS加标纸样测定,发现EOF指标可以较好地反映这些PFAS的含量;采用在线燃烧-离子色谱法测定了19种市售食品包装用纸中TF、无机氟(inorganic fluorine,IF)、EOF的含量,结果显示,相较于其他纸材料,防油纸制品中氟含量显著更高,其TF、EOF分别介于458.55~741.30 mg/kg、10.28~61.04 mg/kg,与制品中添加的含氟防油助剂有关。该研究结果可为食品包装用纸中PFAS物质的管控提供参考依据。
The migration risk of per- and polyfluoroalkyl substances (PFAS) from food packaging paper into food remains a concern.However, the detection methods for PFAS are complex and time-consuming, presenting ongoing challenges to regulatory control systems.This study preliminarily validated the relationship between 24 kinds of PFAS and the levels of total fluorine (TF) and extractable organic fluorine (EOF).Measurement of paper samples spiked with these 24 PFAS demonstrated that the EOF indicator could effectively reflect their content.The contents of TF, inorganic fluorine (IF), and EOF in 19 commercially available food packaging papers were determined using online combustion-ion chromatography.The results showed that, compared to other paper materials, oil-resistant paper products exhibited significantly higher fluorine levels, with TF and EOF ranging from 458.55 to 741.30 mg/kg and 10.28 to 61.04 mg/kg, respectively.This might be associated with the addition of fluorinated oil-resistant additives in these products.The findings of this study provide a reference for the regulatory control of PFAS in food packaging paper.
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