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建立了烟叶中酸性化合物(挥发性、半挥发性羧酸类和酚类)组成研究的全二维气相色谱/飞行时间质谱(GC×GC-TOFMS)分析方法,并用此方法对香料烟中的酸性化合物进行了表征.用同时蒸馏萃取样品的前处理方法,采用TOFMS谱图库检索结合全二维特有的包含结构信息的二维谱图,通过族分离和结构谱图,鉴定出了香料烟中143种挥发性及半挥发性酸性组分,包括10种酸酐和呋喃二酮,43种有机酸和90种酚类化合物.同时对不同类别的化合物在二维气相色谱上的分布模式进行了研究.结果表明,全二维气相色谱飞行时间质谱的高分辨率非常适合于烟叶这类复杂体系的分离分析.
A two-dimensional GC-TOFMS method was developed for the determination of acid compounds (volatile, semi-volatile carboxylic acids and phenols) in tobacco leaves. By using this method, Acidic compounds were characterized by simultaneous distillation of the sample pretreatment method, the use of TOFMS spectral library retrieval combined with the full two-dimensional structure information containing the two-dimensional spectrum, through the separation of the family and the structure of the spectrum to identify the spices smoke 143 kinds of volatile and semi-volatile acidic components, including 10 kinds of anhydride and furandione, 43 kinds of organic acids and 90 kinds of phenolic compounds.At the same time, the distribution patterns of different kinds of compounds in two-dimensional gas chromatography The results show that the high resolution of full two - dimensional gas chromatography time of flight mass spectrometry is very suitable for the separation and analysis of complex systems such as tobacco leaf.