Structure elucidation of four possible biogenic organohalogens using isotope exchange mass spectrometry
作者:Sheryl A Tittlemier、David H Blank、Gordon W Gribble、Ross J Norstrom
DOI:10.1016/s0045-6535(01)00174-6
日期:2002.1
C10H6N2Br5Cl, and C10H6N2Br6 were characterized using isotope exchange positive chemical ionization (IE-PCI) mass spectrometry (MS) and identified by comparison to synthesized standards. NH3 and ND3 were used as reagent gases for the IE-PCI-MS experiment. The shift in mass of the quasimolecular ion between the NH3 and ND3 PCI obtained spectra indicated the number of exchangeable hydrogens attached to the two nitrogen
使用同位素交换正化学电离(IE-PCI)质谱(MS)对四种未知的生物累积卤代化合物C10H6N2Br3Cl3,C10H6N2Br4Cl2,C10H6N2Br5Cl和C10H6N2Br6的分子结构进行表征,并与合成标准品进行比较。NH3和ND3用作IE-PCI-MS实验的反应气。NH3和ND3 PCI获得的光谱中的准分子离子的质量转移表明,连接在C10H6N2Br4Cl2中两个氮原子上的可交换氢数,以及因此而存在的胺类型(伯,仲或叔胺)。实验中使用19种化合物(13种不同取代度的胺; 6种不含氮的胺)作为参考化合物和对照,以验证IE-PCI技术。IE-PCI-MS的结果表明存在两个叔胺官能团。然后提出了四种六卤代化合物的分子结构为1,1'-二甲基-3,3',4,-三溴4',5,5'-三氯-2,2'-联吡咯,1,1 '-二甲基-3,3',4,4'-四溴-5,5'-二氯-2,2'-联吡咯,1,1'-二甲基-3