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在常规质谱中,各种同分异构的稠环芳香烃基本上无法分辨。但在本文报道的以近红外脉冲激光所产生的等离子体质谱中,所分析的四个四稠环芳香烃尽管分子量相同,其负离子质谱却有十分明显的差异,显示了这一研究方法的结构鉴别能力。
In conventional mass spectrometry, various isomeric fused-ring aromatic hydrocarbons are essentially indistinguishable. However, in the plasma mass spectrum generated by the near-infrared pulsed laser in this paper, the four tetrafused aromatic hydrocarbons analyzed have quite distinct negative ion mass spectra despite the same molecular weight, which shows the structural identification of this research method ability.