以食品级接触材料塑料(polyethylene,PE)为研究对象,采用气相色谱-串联质谱法研究PE材料中多环芳烃类16种高致癌物质在纯水基、异辛烷、乙醇、乙酸4种不同模拟物中的迁移规律,研究16种多环芳烃类化合物的溶出量与食品接触介质、乙醇体积分数、乙酸质量浓度、处理时间以及接触温度等因素的关系。结果表明,纯水基食品模拟物对多环芳烃的溶解性不大,4种食酸性食品模拟物相比于水基食品模拟物有更强的溶解性,且多环芳烃的溶出量随着乙酸和乙醇含量的增加而增加;4种食品模拟物对多环芳烃的溶解性顺序为纯水基质<乙醇<乙酸<异辛烷,较高的温度对PE包装材料中16种多环芳烃的溶出迁移具有明显影响,并且随着乙醇体积分数的增加,接触时间的延长,多环芳烃向食品中的迁移浓度也不断增大。
Taking food-grade contact material polyethylene (PE) as the research object, gas chromatography-tandem mass spectrometry was used to study 16 highly carcinogenic substances of polycyclic aromatic hydrocarbons in PE materials in 4 different simulants including pure water, isooctane, ethanol and acetic acid Migration law. The migration law of the simulated substances was studied, and the relationship between the dissolution of 16 kinds of PAHs and the factors such as food contact medium, ethanol fraction, acetic acid concentration, processing time and contact temperature were explored. The results show that the solubility of pure water-based food simulants to polycyclic aromatic hydrocarbons was relatively small, and alcohol-containing food simulants and lipid food simulants had a good dissolution effect on most polycyclic aromatic hydrocarbons. It had stronger solubility than water-based food simulants, and the amount of the dissolved polycyclic aromatic hydrocarbons increased with the increase of acetic acid and ethanol content. High temperature played a significant effect on the dissolution and migration of 16 polycyclic aromatic hydrocarbons in PE packaging materials. Furthermore, with the increase of ethanol concentration and the increase of contact time, the migration concentration of polycyclic aromatic hydrocarbons into food also increased.
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