食品塑料包装材料中光引发剂残留的检测及其迁移规律的研究

发布时间：2018-03-08 12:35

本文选题：光引发剂　切入点：食品塑料包装材料　出处：《安徽农业大学》2015年硕士论文　论文类型：学位论文

【摘要】：塑料包装材料以其优异的化学稳定性、易成型性、机械性能、印刷适性已成为重要的食品包装工业的包装材料。而食品塑料包装材料的安全性逐渐成为食品安全的重要组成部分。食品塑料包装材料中污染物残留分析,迁移理论已成为一个热点研究方向。紫外光固化墨由于其优异特性被用于食品包装印刷,油墨中光引发剂具有毒性,刺激皮肤,而且容易迁移。本论文首先建立了一种简单、快速检测食品塑料包装材料中9种光引发剂:二苯甲酮(BP),2-甲基二苯甲酮(2-MBP),1-羟基环己基苯基酮(Irgacure 184),3-甲基二苯甲酮(3-MBP),4-甲基二苯甲酮(4-MBP),2,2-二甲氧基-1,2-二苯基-乙酮(Irgacure 651),邻苯甲酰苯甲酸甲酯(OMBB),对-N,N-二甲氨基甲酸异辛酯(EHA)和2-异丙基硫杂蒽酮(ITX)的分散固相萃取(d-SPE)净化、气相色谱-质谱联用(GC-MS)分析方法。样品用乙腈超声提取,提取液经氮吹,浓缩后,用150 mg无水MgSO4、50 mg N-丙基乙二胺(PSA)和50 mg C18粉末分散固相萃取净化,用气相色谱/质谱(GC-MS)分析,采用选择离子监测(SIM)模式,外标法定量。9种光引发剂在0.02~1 mg/L范围内线性关系良好,线性相关系数(R2)均大于0.999。9种光引发剂在0.05,0.5和1 mg/kg添加浓度下,回收率范围为82.9%~118.9%,相对标准偏差(RSD)为0.9%~10.5%(n=6),方法的定量限为0.07~0.33 mg/kg。该方法前处理简单,净化效果好,灵敏度和精密度均符合光引发剂检测的要求,适用于食品塑料包装材料中光引发剂残留的检测。同时研究了食品塑料包装中7种光引发剂:2,2-二甲氧基-1,2-二苯基-乙酮(Irgacure 651)、对-N,N-二甲氨基甲酸异辛酯(EHA)、二苯甲酮(BP)、1-羟基环己基苯基酮(Irgacure 184)、2-异丙基硫杂蒽酮(ITX)、邻苯甲酰苯甲酸甲酯(OMBB)、4-二甲基氨基苯甲酸乙酯(EDB)向食品模拟物中的迁移行为。实验结果表明:迁移量受迁移时间影响,各光引发剂迁移量随天数增长而逐渐增大,最后趋于平衡。迁移量受阻隔材质影响,在相同的光引发剂母标浓度和食品模拟物条件下,各光引发剂在不同材质的阻隔材料中的迁移量大小为聚乙烯(PE)双向拉伸聚丙烯/流延聚丙烯(BOPP/CPP)双向拉伸聚丙烯/聚对苯二甲酸乙二醇酯/流延聚丙烯(BOPP/PET/CPP)双向拉伸聚丙烯/低密度聚乙烯(BOPP/LDPE)。迁移量受母标浓度影响,母标浓度为40 mg/L时各光引发剂的迁移量约为母标浓度为20 mg/L的两倍。此外,EHA在不同模拟物,不同初始浓度母标条件下,都未检出,而ITX的迁移量远小于OMBB,EDB,Irgacure 184,BP,Irgacure 651。在同一阻隔材质下,OMBB,EDB,Irgacure 184,BP,ITX在三种食品模拟物中迁移量相当,而Irgacure 651的迁移量在3%乙酸中的迁移量显著低于在纯水和10%的乙醇中的迁移量。
[Abstract]:Plastic packaging materials for their excellent chemical stability, formability, mechanical properties, Printing suitability has become an important packaging material in food packaging industry, and the safety of food plastic packaging materials has gradually become an important part of food safety. Migration theory has become a hot research direction. UV curing ink has been used in food packaging printing because of its excellent properties. Photoinitiator in ink is toxic, irritating skin, and easy to migrate. Rapid detection of nine photoinitiators in food plastic packaging materials: benzophenone BPn2-Methylbenzophenone 2-Methylbenzophenone 1-Hydroxycyclohexylphenyl ketone Irgacure 184-Methylbenzophenone 3-Methylbenzophenone 4-Methylbenzophenone 4-Methylbenzophenone 4-Methylbenzophenone 22-dimethoxy-2-diphenyl-diphenyl ketone Irgacure 651. Purification of methyl benzoyl benzoate by OMBBX, separation of 2-isopropyl thianthronone (ITX) and isooctyl dimethylaminoate (EHA) by solid phase extraction (SPE). Gas chromatography-mass spectrometry (GC-MS) method. The samples were extracted by acetonitrile ultrasonic extraction, the extraction solution was blown by nitrogen and concentrated, then purified by 150 mg anhydrous MgSO 4 (50 mg N propyl ethylenediamine) and 50 mg C 18 powder dispersed solid phase extraction (SPE), and analyzed by gas chromatography / mass spectrometry (GC / MS). Using the selective ion monitoring (Simm) model, the external standard method was used to quantify 9 kinds of photoinitiators in the range of 0.02 ~ (-1) mg/L. The linear correlation coefficient (R _ (2)) was higher than 0.999.9. The concentration of the photoinitiators was 0.05o _ (0.5) and 1 mg/kg, respectively, and the linear correlation coefficient (R _ (2)) was higher than 0.999.9. The recovery range was 82.9% and the relative standard deviation (RSDs) was 0.90.5.The quantitative limit of the method was 0.07 ~ 0.33 mg / kg. The method was simple in pretreatment, good in purifying effect, and its sensitivity and precision were in line with the requirements of photoinitiator detection, and the relative standard deviation (RSDs) was 0.9% and 10.5 mg 路kg ~ (-1) respectively, and the quantitative limit of the method was 0.07 ~ 0.33 mg 路kg ~ (-1). It is suitable for the determination of photoinitiator residues in food plastic packaging materials. At the same time, seven kinds of photoinitiators in food plastic packaging, namely: 2 (2 +) -dimethoxy (2) -dimethoxy (2) -diphenylethanone (1), Irgacure (651), p-NN- (2-dimethylamino) -isooctyl formate (EHAA), benzophenone (benzophenone), have been studied. The migration behavior of 1-hydroxycyclohexylphenyl ketone Irgacure 1844 (2-isopropyl thioxanthrone), methyl orthobenzoate (OMBBX) and ethyl dimethylbenzoate (EDB) to food simulants. The experimental results show that the migration amount is affected by the migration time. The amount of photoinitiator migration increases gradually with the increase of days and tends to balance. The amount of migration is affected by barrier material under the same concentration of photoinitiator and food mimics. The amount of migration of photoinitiators in barrier materials of different materials is PE) biaxial tensile polypropylene / cast polypropylene BOPP / CPP) biaxial tensile polypropylene / polyethylene terephthalate / cast polypropylene BOPP / PET / CPP) biaxial tensile PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / PP / CPP. Polypropylene / low density polyethylene (LDPE). The migration of PP / LDPE is affected by the parent standard concentration. The transport amount of each photoinitiator at 40 mg/L was about twice as high as that of 20 mg/L. In addition, EHA was not detected under the conditions of different simulants and different initial concentrations. However, the migration of ITX was much smaller than that of OMBB / EDB / Irgacure 184B / B / Irgacure 651.Under the same barrier material, the migration of Irgacure 651 in pure water and 10% ethanol was similar in the three food simulants, but the migration of Irgacure 651 in 3% acetic acid was significantly lower than that in pure water and 10% ethanol. The migration of Irgacure 651 in pure water and 10% ethanol was significantly lower than that in pure water and 10% ethanol in the same barrier material, but the migration of Irgacure 651 in 3% acetic acid was significantly lower than that in pure water and 10% ethanol.
【学位授予单位】：安徽农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB484

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