速食食品纸桶包装冲泡过程的矿物油迁移试验研究

目的 建立速食食品纸桶在冲泡过程中产生矿物油迁移的化学溶剂替代试验，并且以此考察市售纸桶包装的矿物油迁移情况。方法 首先将100 ℃的玉米油倒入空纸桶，自然放置30 min以模拟冲泡过程；然后以该植物油为参考，分别考察换作正己烷和95%乙醇的迁移数据，寻找纸桶在食品冲泡过程中矿物油迁移试验的替代化学溶剂。结果 冲泡过程中纸桶及其外层印刷油墨均会迁移矿物油至玉米油中，其中饱和烃（mineral oil saturated hydrocarbons, MOSH）的迁移量为2.26~22.73 mg/kg；纸桶迁移矿物油至正己烷的数据与其迁移到植物油的具有较好的可比性，因而确定正己烷为纸桶的矿物油迁移的化学替代溶剂，从而建立了纸桶冲泡过程的迁移试验，即100 mL正己烷在常温下置于空纸桶30 min，然后测定迁移液中MOSH和芳香烃（mineral oil aromatic hydrocarbons, MOAH）。结论 纸桶包装在冲泡过程会不同程度地迁移出矿物油，其中白桶的迁移量普遍高于牛皮纸桶，部分白桶的MOAH迁移量超出欧盟限量（0.05 mg/kg）。考虑到MOAH有致癌和遗传毒性，建议予以重视。

The Migration test of Mineral Oil Hydrocarbons from Paper-based Bucket Packaging of Instant Foods during the Brewing Process

Objective To propose a migration test of mineral oil hydrocarbons (MOH) using chemical solvent substitution in paper-based food packaging bucket during the process of brewing instant foods, and to analyze the MOH migration levels of commercial paper-based bucket for instant foods. Methods Initially, corn oil at 100°C was poured into the empty paper buckets and allowing them to cool naturally for 30 minutes to simulate the brewing process. Then, using the vegetable oil as a reference, the MOH migration test was conducted when replaced with n-hexane and 95% ethanol, aiming to find alternative chemical solvents for migration tests with chemical solvent substitution for the brewing process. Results Throughout the brewing process, both the paper-based buckets and their outer printing ink exhibit MOH migration into the corn oil, with mineral oil saturated hydrocarbons (MOSH) content ranging from 2.26 to 22.73 mg/kg. The migration results of n-hexane were found to be comparable to those of vegetable oil, and thus suggesting its suitability as a substitute chemical solvent for MOH migration. A proposed MOH migration test from paper-based bucket into foods in the brewing process, involved placing 100 mL of n-hexane in the buckets at room temperature for 30 minutes, followed by determination of MOSH and mineral oil aromatic hydrocarbons (MOAH) in the migration solution. Conclusion The study reveals the commercially paper-based bucket packaging of instant food exhibited varying degrees of MOH migration during the brewing process, with the white paper-based buckets generally exhibiting higher MOH migration levels compared to kraft paper-based ones. Some white paper buckets exceeded the EU limit for MOAH at 0.05 mg/kg. Due to the carcinogenic and genotoxic properties of MOAH, it is crucial to address and monitor this issue.