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| Effect of 60Co-γ Irradiation on Volatile Compounds in Food Contact Composite Packaging Bags |
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| DOI： |
| KeyWord:plastic composite packaging materials volatile organic compounds（VOCs） chemometrics headspace/gas chromatography－mass spectrometry（HS/GC－MS） |
| Author | Institution |
| ZHAO Zi-qing，LI Jia-yi，LIN Qin-bao，YE Zhi-kang，LI He |
1. Shanxi Jinshuo Biomedical Technology Co. Ltd.，Jinzhong ，China; 2. Packaging Engineering Institute，Jinan University，Zhuhai ，China; 3. School of Chemical Engineering and Technology，North University of China，Taiyuan ，China |
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| Abstract: |
| Headspace/gas chromatography－mass spectrometry（HS/GC－MS） combined with MS－DIAL software was applied to the detection of volatile organic compounds（VOCs） in 19 commercial plastic composite packaging bags after 60Co-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 60Co-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. |
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