为了考察食品包装材料中光引发剂向食品中迁移的情况,以水性模拟液作为迁移溶剂,用65 μm聚二甲基硅氧烷/二乙烯基苯(PDMS-DVB)纤维头进行固相微萃取结合气相色谱-质谱(SPME/GC-MS)分析方法同时测定食品包装材料中7种光引发剂(PIs)的迁移量.方法的检出限为0.001 2 ～0.006 9 μg/L,线性范围为0.03 ～ 1.0μg/L(r2＞0.990 9),在3种浓度的添加水平下,加标回收率为70.8％～ 112.0％,相对标准偏差不大于14.0％.利用建立的方法对20个实际样品进行测定,发现所有样品中均检出二苯甲酮,其中10个样品中检出4-甲基二苯甲酮,3个样品中检出1-羟基环己基苯基甲酮,1个样品中检出安息香双甲醚.该方法的灵敏度高,样品前处理过程简单,无需使用有机溶剂,为食品接触材料表面印刷油墨中PIs向水性样品中的迁移测定提供了参考.
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