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为建立液体工业助剂中7种苯系物(苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯、苯乙烯)的顶空气相色谱-质谱定性测定法,采用顶空气相色谱-质谱法对标准样品及工业助剂样品分析,使用仪器自带谱图库、自建标准谱图库、自建本底谱图库比对以及结合保留指数等方法进行定性。结果显示,通过比对仪器自带谱图库及自建标准谱图库定性出苯,检索相似度>90%;与本底谱图库比对检索,定性出甲苯及苯乙烯,检索相似度均>90%;结合双色谱柱保留指数,7种苯系物均能定性。提示该方法不需要前处理,简单快速,准确度高,适用于液体工业助剂中苯系物的定性分析。
In order to establish a qualitative and quantitative method for the determination of seven kinds of benzene series (benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene and styrene) in liquid industrial aids, the headspace gas chromatography Chromatography - mass spectrometry of standard samples and industrial additives sample analysis, using the instrument comes with spectrum library, self-built standard spectral library, self-built base spectral library alignment and retention index and other methods of qualitative. The results showed that the similarities> 90% were obtained by comparing the instrument library with self-built spectral library and self-built standard spectral library, and the similarity was> 90% compared with the original spectral database %; In combination with the two column retention index, seven kinds of benzene series can be qualitative. It is suggested that this method does not require pretreatment, which is simple, rapid and accurate. It is suitable for the qualitative analysis of benzene series in liquid industrial chemicals.