SPME-GC/MS和SPME-GC×GC-TOF/MS技术结合解析聚烯烃树脂挥发性有机化合物  

Combining SPME-GC/MS and SPME-GC×GC-TOF/MS Techniques to Resolve Volatile Organic Compounds in Polyolefin Resins

作　　者：朱长兴 赵东波[2] 李广全 贺育成[2] 韩雪 胡鑫涛 吕兆林[1,4] Changxing Zhu;Dongbo Zhao;Guangquan Li;Yucheng He;Xue Han;Xintao Hu;Zhaolin Lü(College of Biological Science and Technology,Beijing Forestry University,Beijing 100083,China;Lanzhou Petrochemical Company,PetroChina Company Limited,Lanzhou 730060,China;Lanzhou Chemical Research Center,China Petroleum and Petrochemical Research Institute,Lanzhou 730060,China;Beijing Key Laboratory of Forestry Food Safety and Processing,Beijing 100083,China)

机构地区：[1]北京林业大学生物科学与技术学院,北京100083 [2]中国石油天然气股份有限公司兰州石化分公司,甘肃兰州730060 [3]中国石油石油化工研究院兰州化工研究中心,甘肃兰州730060 [4]林业食品安全与加工北京市重点实验室,北京100083

出　　处：《高分子材料科学与工程》2024年第11期67-78,共12页Polymer Materials Science & Engineering

基　　金：兰州石化资助项目(LZSH-2023-JS-155)。

摘　　要：聚烯烃树脂在加工过程中受原料、加工工艺、各类助剂的影响,生产得到的聚烯烃树脂会不同程度地释放挥发性有机物,对环境造成污染,对人体健康产生危害。文中以聚烯烃树脂成品、加工使用的树脂原料及助剂为实验材料,结合一维色谱技术(气相色谱-质谱联用GC/MS)及全二维色谱技术(全二维气相色谱-飞行时间质谱GC×GC-TOF/MS)对聚烯烃树脂挥发性有机化合物进行了系统表征。基于表征结果,采用分子感官评价技术筛选异味贡献化合物,揭示其化学本质。研究结果显示,GC/MS共检测到2种树脂产品中123个挥发性化合物、2种助剂109个挥发性化合物、1种原料57个挥发性化合物,共159种挥发性有机化合物;GC×GC-TOF/MS技术在2种树脂产品中共检出222个挥发性化合物,可分为149种,相较于一维色谱技术化合物多了99个,化合物种类多了43种;2种技术共检测出278种挥发性化合物,分子感官评价技术筛选出异味化合物36种,其中主要异味贡献物质为4-甲基辛烷、甲苯、邻二甲苯、壬醛、癸醛和2-乙基-1-己醇。Polyolefin resin is affected by raw materials,processing technology and various auxiliaries in processing process,and the produced polyolefin resins will release volatile organic compounds to different degrees,causing pollution to the environment and harm to human health.In this study,the polyolefin resin products,resin raw materials and additives used in processing were used as experimental materials,and onedimensional chromatography technology(GC/MS combined with gas chromatography and mass spectrometry)and full two-dimensional chromatography technology(two-dimensional gas chromatography and time-of-flight mass spectrometry GC×GC-TOF/MS)were used to systematically characterize volatile organic compounds of polyolefin resin.The molecular sensory evaluation technique was used to screen odor-contributing compounds and reveal their chemical nature.The results show that 123 volatile compounds in 2 kinds of resin products,109 volatile compounds in 2 kinds of auxiliaries,57 volatile compounds in 1 kind of raw material were detected by GC/MS,a total of 159 volatile organic compounds.A total of 222 volatile compounds were detected by GC×GC-TOF/MS technology,which could be divided into 149 kinds.Compared with one-dimensional chromatography technology,the number of compounds is 99 more and the types of compounds are 43 more.A total of 278 volatile compounds were detected by the two techniques,and 36 odor compounds were screened by molecular sensory evaluation.The main odor contributing substances are 4-methyloctane,toluene,o-xylene,nonylaldehyde,capric aldehyde and 2-ethyl-1-hexanol.

关 键 词：气相色谱-质谱联用 全二维气相色谱-飞行时间质谱 聚烯烃树脂 挥发性化合物 异味物质 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]