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首页> 外文期刊>Analytical Sciences >Polychlorinated Aromatic Hydrocarbons in a Soil Sample Measured Using Gas Chromatography/Multiphoton Ionization/Time-of-Flight Mass Spectrometry
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Polychlorinated Aromatic Hydrocarbons in a Soil Sample Measured Using Gas Chromatography/Multiphoton Ionization/Time-of-Flight Mass Spectrometry

机译：使用气相色谱/多光子电离/飞行时间质谱法测量土壤样品中的多氯代芳烃

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摘要

Gas chromatography/multiphoton ionization/time-of-flight mass spectrometry (GC/MPI/TOF-MS) was applied to a soil sample to survey several groups of polychlorinated aromatic hydrocarbons (polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs), polychlorinated diphenylethers (PCDEs), and polychlorinated terphenyls (PCTs)). The signal peaks in the two-dimensional display of GC/MS could be easily and accurately assigned from the intensity distribution of the isotope peaks, even in the presence of numerous interfering species. Using this technology, mutual interferences between organochlorine compounds can be readily recognized from the data of the two-dimensional display after a measurement, although the separation of these compounds is sometimes difficult using high-resolution magnetic-sector-type mass spectrometry. This approach, based on MPI, results in less fragmentation, and is useful for the identification of analytes. Thus, GC/MPI/TOF-MS allows for the simultaneous determination of PCDD/Fs and related compounds in real samples containing numerous interfering species.
机译：将气相色谱/多光子电离/飞行时间质谱（GC / MPI / TOF-MS）应用于土壤样品，以调查几组多氯代芳烃（多氯二苯并对二恶英/二苯并呋喃（PCDD / Fs）） ，多氯联苯（PCB），多氯萘（PCN），多氯二苯醚（PCDE）和多氯三联苯（PCT））。即使存在多种干扰物质，也可以根据同位素峰的强度分布轻松，准确地分配GC / MS二维显示中的信号峰。使用该技术，尽管有时使用高分辨率的磁扇型质谱法很难分离这些化合物，但从测量后的二维显示数据中可以很容易地识别出有机氯化合物之间的相互干扰。这种基于MPI的方法可减少碎片，对鉴定分析物很有用。因此，GC / MPI / TOF-MS可以同时测定含有多种干扰物质的真实样品中的PCDD / Fs和相关化合物。

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