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目的建立聚酯(PET)和4种食品模拟物中锑的电感耦合等离子体质谱(ICP-MS)测定方法。用该方法研究PET中的锑向水、10%(V/V)乙醇溶液、3%(W/V)乙酸水溶液和精炼橄榄油4种食品模拟物迁移的行为与浸泡时间、温度、食品模拟物属性、锑初始含量等参数的关系。方法在不同的温度下,将不同的PET浸泡于食品模拟物中,于一定的时间点吸取少量浸泡液,用ICP-MS测定其含量。结果 ICP-MS方法回收率在94.3%～96.1%之间,相对标准偏差在1.38%～3.31%之间。结论锑迁出量随温度升高而增加;随着时间的延长,锑迁出量逐渐增加,一定时间后达到迁移平衡;大部分PET材料本底含量越高迁出量越高;PET中锑易于在酸性食品模拟物中迁出,应少食用PET包装的酸性食品。
Objective To establish a method for the determination of antimony in polyester (PET) and four food simulants by inductively coupled plasma mass spectrometry (ICP-MS). The method was used to study the migration behavior of four kinds of food simulants including antimony to water, 10% (V / V) ethanol solution, 3% (W / V) acetic acid aqueous solution and refined olive oil. Material properties, the initial content of antimony and other parameters. Methods At different temperatures, different PET soaked in food simulants, at a certain time point to absorb a small amount of soaking solution, measured by ICP-MS content. Results The recoveries of ICP-MS method ranged from 94.3% to 96.1% with relative standard deviations of 1.38% -3.31%. Conclusion The migration of antimony increases with the increase of temperature. With the extension of time, the migration of antimony gradually increases, and reaches the balance of migration after a certain period of time. The higher the background content of most PET materials, the higher the migration rate of antimony Easy to migrate in acidic food simulants, should be eaten with PET packaging less acidic foods.