贮藏期间保鲜膜中增塑剂DOP对大米的污染规律研究

Study on contaminate of DOP in rice for film in storage

试验采用市场中常见的PVC大米保鲜袋对大米进行包装,在常温下贮藏,采用固相萃取方法定期检测保鲜膜和大米中的DOP含量的变化。结果发现,随着贮藏时间的延长,不同保鲜膜中DOP迁移量均逐渐升高,0.08mm PVC保鲜膜在贮藏到18个月时,DOP迁移量接近50μg/g;同时大米受DOP污染的程度随着贮藏时间的延长也日趋严重,其中0.08mm PVC保鲜膜中大米在贮藏到18个月时,大米中DOP迁移量接近4.5μg/g。人体若食用这种大米,很可能对人体造成伤害。

Rice was packed with the ordinary food PVC film and stored under room temperature for 18 months. Then the content of DOP was measured with SPE flowing HPLC periodically. The result showed that with the store time extended, the migration capacity of DOP in PVC film increased also. At 18 month, the migration of DOP arrived at 50μg/g in 0.08mm PVC＇s package. And degree of contaminate of packed rice increased gradually, the content of DOP in rice arrived at 4.5μg/g. If people eat this kind of rice, it would be harmful to bodies.