Analysis of volatile and semi-volatile alkaline compounds in tobacco leaf by using comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry was written by Li, Hai-Feng;Zhong, Ke-Jun;Lu, Xin;Bai, Chang-Min;Huang, Jian-Guo;Lu, Hong-Liang;Ma, Chen-Fei;Zhu, Shu-Kui;Kong, Hong-Wei;Zhao, Ming-Yue;Xie, Jian-Ping;Niu, Sen;Xu, Guo-Wang. And the article was included in Huaxue Xuebao in 2006.HPLC of Formula: 644-98-4 This article mentions the following:
Comprehensive two-dimensional gas chromatog./time-of-flight mass spectrometry (GC × GC-TOFMS) has been applied for characterization of volatile and semi-volatile alk. compounds in oriental tobacco leaf. Simultaneous distillation extraction (SDE) was used as the sample extraction method. Two types of column set were compared, and appropriate GC × GC separation conditions were suggested. The results showed that the peaks detected by GC × GC method were far more than that by 1DGC. The separation behavior on 2D plot of different kinds of compounds was investigated. TOFMS library search combining structured chromatogram of GC × GC was used to identify the nitrogen-containing compounds in tobacco leaf. A total of 92 alk. compounds were tentatively identified. The results showed that GC × GC/TOFMS method is suitable for separation and identification of complex system. In the experiment, the researchers used many compounds, for example, 2-Isopropylpyridine (cas: 644-98-4HPLC of Formula: 644-98-4).
2-Isopropylpyridine (cas: 644-98-4) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.HPLC of Formula: 644-98-4