摘要
为了更好地溯源食品包装微塑料,并分析其对人体的危害,研究利用傅里叶变换离子回旋共振质谱和紫外光解离质谱对矿泉水瓶及真空包装袋微塑料进行了表征。结果显示,矿泉水瓶和真空包装袋微塑料的离子峰信号强度最大分别为3.5×108和4.8×109;并且二者均在m/z大于1000 Da的区间内存在等间距峰,其质量差分别为192 Da和113 Da,这分别与聚对苯二甲酸乙二醇酯和聚酰胺6的重复单元质量一致。经过激光解吸后,矿泉水瓶微塑料存在共价键断裂情况,而真空包装袋则不存在该现象。而经过紫外光解离后,矿泉水瓶和真空包装袋分别产生了35个和59个碎片离子。上述结果表明,傅里叶变换离子回旋共振质谱和紫外光解离质谱能对食品包装产生的微塑料进行准确表征,实现微塑料的溯源。
In order to better trace the microplastics in food packaging and analyze their harm to human body,Fourier transform ion cyclotron resonance mass spectrometry and ultraviolet photodissociation mass spectrometry were used to characterize the microplastics in mineral water bottles and vacuum packaging bags.The results show that the ion peak signal intensity of mineral water bottle and vacuum packaging bag microplastics is 3.5×108 and 4.8×109,respectively.Both of them have equidistant peaks in the range of m/z greater than 1000 Da,and their mass differences are 192 Da and 113 Da,respectively,which are consistent with the mass of the repeating units of polyethylene terephthalate and polyamide 6,respectively.After laser desorption,there is a covalent bond fracture in the microplastics of mineral water bottles,while this phenomenon does not exist in vacuum packaging bags.After UV photodissociation,35 and 59 fragment ions were produced in mineral water bottles and vacuum packaging bags,respectively.The above results show that Fourier transform ion cyclotron resonance mass spectrometry and ultraviolet photodissociation mass spectrometry can accurately characterize the microplastics produced by food packaging and realize the traceability of microplastics.
作者
顾连军
GU Lianjun(Nantong Product Quality Supervision and Inspection Institute,Nantong 226001,China)
出处
《工业技术与职业教育》
2024年第4期5-9,85,共6页
Industrial Technology and Vocational Education
基金
南通市科技计划项目“食品包装检测中微纳米塑料分子结构质谱表征的新方法及应用研究”(课题编号:MSZ2023122),主持人顾连军。
