食品接触材料成型品中的苯乙烯单体迁移风险分析

Risk Analysis of Styrene Monomer Migration in Food Contact Materials

通过研究食品接触材料（聚苯乙烯（PS）、丙烯腈-苯乙烯共聚物（AS）及丙烯腈、丁二烯、苯乙烯共聚物（ABs））成型品样本的4种食品模拟物《水、3％乙酸、10％乙醇、赘花耔油）中苯乙烯单体的迁移情况。并进行风险分析，初步确定食品接触材料成型品中苯乙烯单体迁移的风险等级。通过顶空-气相色谱质谱联用法测定食品模拟物中苯乙烯单体的迁移量，并计算苯乙烯单体的日累计暴露量，结合专家评估的方式进行风险分析。结果表明：苯乙烯单体在水、3％乙酸、10％乙醇、葵花耔油4种食品模拟物中均有迁移，在葵花籽油食品模拟物中苯乙烯单体迁移量较高，其次是水、10％乙醇、3％乙酸；所采集样本中苯乙烯单体日累计暴露量小于0．01mg／（d·kg）。且低于JECFA规定的苯乙烯安全摄入量。结合专家评估结果，最终确定食品接触材料成型品中的苯乙烯单体迁移风险等级为L级（低风险）。

The migration of styrene monomers in four food simulators （water, 3% acetic acid, 10% ethanol, sunflower seed oil） from food contact materials （polystyrene （PS）, acrylonitrile-styrene copolymer （AS） and acrylonitrile-butadiene-styrene copolymer （ABS） was studied. The risk level of the migration of styrene from the four food contact products was preliminary determined. The migration of styrene monomers in food simulants was determined by headspace gas chromatography-mass spectrometry, and the cumulative daily exposure of styrene monomers was calculated. Risk analysis was carried out in combination with expert assessment. The results show that： the migration of styrene monomer in water, 3% acetic acid, 10% ethanol and sunflower oil was higher than that in water, 10% ethanol and 3% acetic acid. The cumulative daily exposure of styrene monomer was less than 0.01 mg/（d.kg） and lower than the safe intake of styrene stipulated by JECFA. According to the result of expert evaluation, the migration risk grade of styrene monomer in the molding products of food contact materials was determined as L （low risk）.