^(60)Co-γ辐照对食品接触用复合包装袋中挥发性化合物的影响  

Effect of ^(60)Co-γIrradiation on Volatile Compounds in Food Contact Composite Packaging Bags

作　　者：赵子青 李佳怡 林勤保[2] 叶智康 李河 ZHAO Zi-qing;LI Jia-yi;LIN Qin-bao;YE Zhi-kang;LI He(Shanxi Jinshuo Biomedical Technology Co.Ltd.,Jinzhong 030600,China;Packaging Engineering Institute,Jinan University,Zhuhai 519070,China;School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China)

机构地区：[1]山西锦烁生物医药科技有限公司,山西晋中030600 [2]暨南大学包装工程研究所,广东珠海519070 [3]中北大学化学工程与技术学院,山西太原030051

出　　处：《分析测试学报》2022年第10期1459-1469,1477,共12页Journal of Instrumental Analysis

基　　金：国家重点研发项目(2018YFC1603204,2018YFC1603200);晋中市重点研发计划(农业)(Y212006)。

摘　　要：针对辐照杀菌会使塑料包装产生未知辐解产物的问题,该文采用顶空气相色谱-质谱法(HS/GCMS)结合MS-DIAL软件对^(60)Co-γ辐照(0~10 kGy)后的19种商用塑料复合包装袋中的挥发性有机物(VOCs)进行检测。以MS-DIAL软件对谱图的解卷积、峰对齐及物质定性结果,以正交偏最小二乘法判别分析(OPLSDA)模型对辐照前后材料的VOCs组成进行分析,考察不同辐照剂量下复合包装材料中VOCs组成的变化。结果显示,复合包装中的VOCs以聚合物降解产物烷烃和烯烃为主,^(60)Co-γ辐照前后复合包装中的VOCs组成具有显著差异,且包装产生的VOCs总量随辐照剂量的增加而递增。通过OPLS-DA模型投影变量重要度(VIP)值筛选出17种对差异贡献较大的物质,这些差异物质大多为材料的降解产物,总体呈现检出量随辐照剂量增加而递增的趋势。该研究结果为辐照包装中挥发性非有意添加物质数据库的建立提供了依据。Headspace/gas chromatography-mass spectrometry(HS/GC-MS)combined with MSDIAL software was applied to the detection of volatile organic compounds(VOCs)in 19 commercial plastic composite packaging bags after ^(60)Co-γ irradiation(0-10 kGy)to address the problem of unknown irradiation products generated by sterilization of plastic packaging.The deconvolution,peak alignment and substance characterization results of the spectra were analyzed by MS-DIAL software,and the VOCs composition of the materials before and after irradiation was analyzed by orthogonal partial least squares-discriminant analysis(OPLS-DA)model to examine the changes of VOCs composition in the composite packaging materials under different irradiation doses.The results showed that the VOCs in the composite packaging were mainly alkane and alkene,while the composition of VOCs in the composite packaging before and after ^(60)Co-γ irradiation was significantly different,and the total amount of VOCs produced by the packaging increased with the irradiation dose.Through the analysis of the importance of projection variable(VIP)value in OPLS-DA model,17 substances with significant contribution to the difference were selected.Most of these substances were degradation products of materials,and the detected amount showed an increasing trend with the irradiation dose.The results of the study provide a basis for the development of a database for volatile unintentionally added substances in irradiated packaging.

关 键 词：塑料复合包装材料 挥发性有机物(VOCs) 化学计量学 顶空气相色谱-质谱法(HS/GC-MS) 

分 类 号：O657.6[理学—分析化学]