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利用溶剂提取、固相微萃取(SPME)两种方法,分别结合气相色谱-质谱法,分析了汽油胶中挥发性物质的主要成分,同时利用裂解气相色谱-质谱法(Py-GC/MS)、红外光谱法(IR)、扫描电镜-X射线能谱法(SEM-EDX)分别对汽油胶的胶体成分进行了检测。结果表明,汽油胶中的挥发性物质主要包括苯系物、C6~C9等烷烃化合物,胶体主要由氯丁胶和天然胶组成,通过各种提取、分析方法的比较,优先选用固相微萃取进行挥发性物质的提取,胶体成分的检验可根据样品的具体情况选择Py-GC/MS法或IR法分别结合SEM-EDX法的检验模式。
Gas chromatography-mass spectrometry (GC-MS) was used to analyze the main components of the volatile compounds in gasoline jelly by solvent extraction and solid-phase microextraction (SPME). Pyrolysis gas chromatography-mass spectrometry (Py-GC / MS) , Infrared spectroscopy (IR) and scanning electron microscopy (SEM) -spectroscopy (EDX) were used to detect the colloidal composition of gasoline gum. The results showed that the volatile compounds in gasoline gum mainly consisted of benzene compounds and C6 ~ C9 alkane compounds. The colloid mainly consisted of neoprene and natural gum. Through the comparison of various extraction and analysis methods, the solid phase microextraction Volatile substances extraction, colloidal components of the test can be selected according to the specific circumstances of the sample Py-GC / MS or IR method combined with the SEM-EDX test mode.