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再生纸与原纸中矿物油成分的LC-GC-MS检测及鉴别
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作者单位
朱丽娴,林勤保,陈胜,钟怀宁,李忠,廖佳 1.暨南大学包装工程研究所2.广州海关检验检疫技术中心广东省动植物与食品进出口技术措施研究重点实验室,食品接触材料国家重点实验室3.拱北海关技术中心化学分析实验室 
基金项目:国家重点研发计划(2018YFC1603204);广东省动植物与食品进出口技术措施研究重点实验室开放课题(IQTC201803);珠海进出口公共技术服务平台产学研协同创新计划(IETP201901012)
中文摘要:利用在线液相色谱-气相色谱-质谱法(LC-GC-MS)检测再生纸和原纸中的矿物油成分,结合多元统计分析,研究了再生纸和原纸的差异性并进行鉴别。利用正己烷-乙醇(1∶1)溶液提取纸样中矿物油成分,通过在线液相色谱-气相色谱-质谱法分析提取物,并对色谱图进行解卷积和保留时间对齐处理,结合主成分分析(PCA)和正交偏最小二乘判别分析(OPLS-DA)方法筛选再生纸和原纸的差异性物质,并对两种纸样进行鉴别。结果表明,基于纸张中矿物油成分,使用多元统计分析可以清楚地区分再生纸和原纸。再生纸与原纸中的差异性物质有:芳香烃矿物油(MOAH)馏分中的二异丙基萘同分异构体、四甲基联苯同分异构体、二甲基联苯同分异构体、异丙基联苯同分异构体,饱和烃矿物油(MOSH)馏分中碳原子数为25~33的正构烷烃。
中文关键词:再生纸;原纸  在线液相色谱-气相色谱-质谱法;主成分分析;矿物油
 
Detection of Mineral Oils in Recycled and Virgin Papers by LC-GC-MS and Their Discrimination
Abstract:An online liquid chromatography-gas chromatography-mass spectrometric(LC-GC-MS) method was developed for the detection of mineral oil components in recycled and virgin papers.Meanwhile,combined with multivariate statistical analysis,the differences between recycled and virgin papers were analyzed and identified.The mineral oil components in paper samples were extracted with n-hexane-ethanol(1∶1) solution,then analyzed by LC-GC-MS.The chromatograms were subjected to convolution and retention time alignment processing.Principal component analysis(PCA) and orthogonal partial least squares discriminant analysis(OPLS-DA) were used to discriminate the recycled and virgin papers,and screen the differential components.Results showed that recycled and virgin papers could be clearly distinguished by multivariate statistical analysis.Compounds including diisopropyl naphthalene isomers,tetramethyl biphenyl isomers,dimethyl biphenyl isomers,isopropylbiphenyl isomers in mineral oil aromatic hydrocarbons(MOAH) fraction,and the compounds containing n-alkanes with carbon atom numbers from 25 to 33 in mineral oil saturated hydrocarbons(MOSH) fraction,were responsible for the chemical difference between recycled and virgin papers.
Key Words:recycled paper  virgin paper  online liquid chromatography-gas chromatography-mass spectrometry  principal component analysis  mineral oil
引用本文:朱丽娴,林勤保,陈胜,钟怀宁,李忠,廖佳.再生纸与原纸中矿物油成分的LC-GC-MS检测及鉴别[J].分析测试学报,2020,39(5):569-576.
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