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采用顶空固相微萃取-气相色谱-质谱联用(HS-SPME-GC-MS)技术对市售5个厂家甲苯的微量特征组分进行测定分析,共筛选出了10个可用于甲苯溯源的诊断比值.利用所选诊断比值的散点分布图,结合相似度及t检验等化学计量学方法可完全鉴别室外风化30 min以内的甲苯样品.
The headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) technology was used to determine the trace components of toluene from five factories. A total of 10 traceable trace elements The diagnostic ratio of the selected diagnostic ratio of the scatter plot, combined with similarity and t-test and other chemometric methods can be fully identified outside the weathering within 30 min of toluene samples.