食品用防油纸中有害物的迁移分析
发布时间：2018-10-08 09:09
【摘要】：食品包装防油纸是一种用于防止食品中油脂透过的纸张。而防油纸中含有的全氟辛酸为其主要的有害物质,全氟化合物是一种新型的持久性污染物,毒理学研究证明,此类物质具有导致器官损伤、神经行为缺陷、生殖发育障碍、脂代谢紊乱以及各种激素分泌失调等多种症状的毒性。防油纸中的全氟辛酸存在迁移到油脂类食品的可能性,给人们身体健康带来危害。本文采用气相色谱质谱联用技术(GC-MS)检测防油纸中全氟辛酸的残留以及迁移量。首先通过对比固相萃取、液-液萃取、超声提取、索式提取和加速溶剂萃取几种样品提取方法确定了选用超声提取法,并通过对比确定了提取溶剂、提取温度。然后进行衍生化方式的确定,最终确定衍生温度为60℃,衍生时间为60分钟,并在衍生过程中加入氢氧化钠溶液。之后,优化仪器参数,确定用内标法进行定量,检测几种防油纸样品中的全氟辛酸残留。涂布防油纸,检测其防油等级,并分别检测其全氟辛酸的残留。选择一种等级的涂布防油纸,测量其在不同温度下向油脂类食品模拟物的迁移水平,并做出它的迁移模型。结果表明,测得两种普通防油纸样品中全氟辛酸含量分别为0.6μg/kg和1.86μg/kg,爆米花桶样品中全氟辛酸含量为2.02μg/kg,烧烤油纸和汉堡纸及小吃包装纸袋中没有检测到全氟辛酸。对涂布防油纸进行残留检测,防油等级为6级的防油纸全氟辛酸的含量为0.0091μg/cm2,防油等级为7级的防油纸全氟辛酸的含量为0.0241μg/cm2,防油等级为8级的防油纸全氟辛酸的含量为0.0281μg/cm2,均没有超过国家对于全氟添加剂使用国家标准中的限值。对于含氟涂层防油纸,随着防油等级的增高,其所含全氟辛酸的量也增加的更多。对涂布防油纸进行迁移实验,在20℃时,全氟辛酸的迁移量为0.0140μg/cm2-0.0275μg/cm2;在70℃时,全氟辛酸的迁移量为0.0093 μg/cm2-0.0213μg/cm2; 在 121℃时,全氟辛酸的迁移量为0.0039μg/cm2-0.0232μg/cm2。借助软件对实验数据进行回归分析,证明在20℃时,全氟辛酸向橄榄油中的迁移规律符合Boltzmann;在70℃时,全氟辛酸向橄榄油中的迁移规律符合指数函数。
[Abstract]:Food packaging oil-proof paper is used to prevent oil in food through the paper. But the perfluorooctanoic acid contained in the oil-proof paper is its main harmful substance, perfluorooctanoic acid is a new type of persistent pollutant. Toxicological studies have shown that these substances can lead to organ damage, neurobehavioral defects, reproductive disorders, Dyslipidemia and various hormone secretion disorders and other symptoms of toxicity. Perfluorooctanoic acid in oil-proof paper has the possibility of migrating to fatty food, which is harmful to people's health. The residue and migration of perfluorooctanoic acid in oil-proof paper were determined by gas chromatography-mass spectrometry (GC-MS). Firstly, ultrasonic extraction method was selected by comparing solid phase extraction, liquid-liquid extraction, ultrasonic extraction, cable extraction and accelerated solvent extraction, and the extraction solvent and temperature were determined by comparison. Then the derivatization method was determined, and the derivative temperature was 60 鈩，
本文编号：2256213
[Abstract]:Food packaging oil-proof paper is used to prevent oil in food through the paper. But the perfluorooctanoic acid contained in the oil-proof paper is its main harmful substance, perfluorooctanoic acid is a new type of persistent pollutant. Toxicological studies have shown that these substances can lead to organ damage, neurobehavioral defects, reproductive disorders, Dyslipidemia and various hormone secretion disorders and other symptoms of toxicity. Perfluorooctanoic acid in oil-proof paper has the possibility of migrating to fatty food, which is harmful to people's health. The residue and migration of perfluorooctanoic acid in oil-proof paper were determined by gas chromatography-mass spectrometry (GC-MS). Firstly, ultrasonic extraction method was selected by comparing solid phase extraction, liquid-liquid extraction, ultrasonic extraction, cable extraction and accelerated solvent extraction, and the extraction solvent and temperature were determined by comparison. Then the derivatization method was determined, and the derivative temperature was 60 鈩，
本文编号：2256213
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