基于GC-MS和化学计量法探究边角料添加比例对食品接触用再生PE薄膜的影响  

Effect Investigation of Scrap Addition Ratio on Recycled Food Contact Polyethylene Films Based on GC-MS and Chemometrics

作　　者：郭盼 曾少甫 朱蕾 吴永宁 王志伟[1,3] 胡长鹰 GUO Pan;ZENG Shao-fu;ZHU Lei;WU Yong-ning;WANG Zhi-wei;HU Chang-ying(Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes,College of Packaging Engineering,Jinan University,Zhuhai 519070,China;Department of Food Science and Engineering,Jinan University,Guangzhou 510632,China;College of Mechanics and Architectural Engineering,Jinan University,Guangzhou 510632,China;China National Center for Food Safety Risk Assessment,Beijing 100022,China)

机构地区：[1]暨南大学包装工程学院,广东省普通高校产品包装与物流重点实验室,广东珠海519070 [2]暨南大学食品科学与工程系,广东广州510632 [3]暨南大学力学与建筑工程学院,广东广州510632 [4]国家食品安全风险评估中心,北京100022

出　　处：《分析测试学报》2022年第10期1470-1477,共8页Journal of Instrumental Analysis

基　　金：国家自然科学基金国际(地区)合作与交流项目(32061160474)。

摘　　要：对含不同比例边角料再生聚乙烯(PE)薄膜的颜色、总迁移量进行测定,基于气相色谱-质谱联用(GC-MS)技术对其中的挥发性物质进行筛查,并结合化学计量法分析差异性物质。结果表明:边角料的加入对单层再生薄膜颜色的影响可忽略,且原生和再生PE薄膜在4种食品模拟物的总迁移量均小于安全限量10 mg/dm^(2)。GC-MS共检出90种挥发性有机化合物,主要为脂肪烃、添加剂及其降解产物和杂质等。通过主成分分析(PCA)和正交偏最小二乘-判别分析(OPLS-DA)模型将再生PE薄膜分为3类,边角料含量低于10%时与原生薄膜相似,10%~50%时需进一步评估,高于50%时需重点关注。并构建V-plot筛选出26种造成样品差异的特征成分,主要为脂肪烃,其次为添加剂及其降解产物,如十二酰胺、壬醛和抗氧剂1010的降解产物等。该研究可为食品接触用领域边角料“膜对膜”同级回收的应用提供借鉴。The color and overall migration of recycled polyethylene(PE)films containing different proportion of scraps were determined.The volatile substances were screened by gas chromatography-mass spectrometry(GC-MS),and the different substances were analyzed by chemometrics.The experimental results showed that the addition of scraps exerted a negligible effect on the color of the single-layer recycled film,while the total migration of the virgin and recycled PE films in four food simulants was less than the safety limit of 10 mg/dm^(2).A total of 90 volatile organic compounds were detected by GC-MS,mainly including aliphatic hydrocarbons,additives and their degradation products and impurities.The recycled PE films were divided into three categories by using principal components analysis(PCA)and orthogonal partial least squares-discriminate analysis(OPLSDA)models.The recycled PE films were similar to the original film when the contents of scrap were lower than 10%.Further evaluation was needed when the contents of scrap were between 10% and 50%,and more attention was needed at higher than 50%.Moreover,V-plot was constructed to screen 26 characteristic components that caused the sample differences,mainly aliphatic hydrocarbons,followed by additives and their degradation products,such as the degradation products of dodecanamide,nonanal and antioxidant 1010.This study provided a reference for the application of“film to film”recycling of food contact scraps.

关 键 词：边角料 再生聚乙烯 气相色谱-质谱联用(GC-MS) 化学计量法 

分 类 号：O657.7[理学—分析化学] TS206.4[理学—化学]