微波用食品塑料包装中添加剂的检测方法、迁移规律及模型研究

发布时间：2018-01-21 15:04

本文关键词： 添加剂微波食品包装材料迁移规律迁移模型　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：为了研究微波用食品塑料包装中添加剂的检测方法、迁移规律及模型,本文选取PVC和PP食品塑料包装,以橄榄油作为食品模拟物,进行了增塑剂和抗氧化剂的迁移实验,主要研究结果如下:(1)采用回旋振荡-乙腈超声提取的方法对增塑剂和抗氧化剂进行萃取,利用气相色谱-质谱联用(GC-MS)和高效液相色谱(HPLC)法进行测定,建立了一种方便、高效的食品塑料包装和食品模拟物中添加剂的检测方法,回收率在89.1%~97.4%之间,检出限在0.02-0.07 mg/L范围内,为食品包装材料中增塑剂和抗氧化剂的迁移研究提供了方法。(2)测试了不同市售产品材料中增塑剂或抗氧化剂含量,结果发现部分PVC制品含有过量增塑剂,部分PP制品中含有过量抗氧化剂,并进行微波条件下的迁移实验,发现一种PVC材料中增塑剂DBP迁移到食品模拟物中的含量超过国家卫生部的限量要求,另一种PP材料中抗氧化剂BHT迁移到食品模拟物中的含量超过国家卫生标准中规定的特定迁移量。(3)随着微波加热时间和加热功率的增加,塑料食品包装材料中添加剂的迁移量逐渐增加,通过对比包装材料在不同类型食品模拟物中的迁移量,发现油脂类食品模拟物更利于包装材料中添加剂向食品中的迁移。(4)以Fick扩散第二定律为基础,结合增塑剂迁移实验所得数据,计算出增塑剂在食品包装材料中迁移的扩散系数D和分配系数K,建立了单层通用迁移数学模型。
[Abstract]:In order to study the detection method, migration rule and model of additives in microwave plastic food packaging, PVC and PP food plastic packaging were selected in this paper, olive oil was used as food simulation. The migration experiments of plasticizers and antioxidants were carried out. The main results were as follows: 1) extraction of plasticizers and antioxidants by cyclotron oscillation-acetonitrile ultrasonic extraction. A convenient and efficient method for the determination of additives in food plastics packaging and food simulants was established by gas chromatography-mass spectrometry (GC-MS) and high performance liquid chromatography (HPLC). The recovery was between 89.1% and 97.4%, and the detection limit was in the range of 0.02-0.07 mg/L. The method of migration of plasticizers and antioxidants in food packaging materials was provided. The contents of plasticizers and antioxidants in different commercial products were tested. The results showed that some PVC products contained excessive plasticizers, some PP products contained excessive antioxidants, and the migration experiments were carried out under microwave conditions. It was found that the amount of plasticizer DBP in a PVC material migrated to the food mimics exceeded the limit required by the Ministry of Health. The migration of antioxidant BHT from another PP material to food mimics exceeded the specific migration amount specified in the national health standard. 3) with the increase of microwave heating time and heating power. The migration of additives in plastic food packaging materials increased gradually, and the migration of packaging materials in different types of food simulants was compared. It was found that the grease food mimics were more favorable for the migration of additives from packaging materials to food. 4) based on the second law of Fick diffusion and the data obtained from plasticizer migration experiments. The diffusion coefficient D and distribution coefficient K of plasticizer migration in food packaging materials were calculated, and the mathematical model of monolayer general migration was established.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TS206.4

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