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首页> 外文期刊>Applied Spectroscopy: Society for Applied Spectroscopy >An Investigation of Micro-Hollow Cathode Glow Discharge Generated Optical Emission Spectroscopy for Hydrocarbon Detection and Differentiation
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An Investigation of Micro-Hollow Cathode Glow Discharge Generated Optical Emission Spectroscopy for Hydrocarbon Detection and Differentiation

机译：微空心阴极辉光放电产生的光发射光谱用于碳氢化合物检测和鉴别的研究

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摘要

The analytical utility of a micro-hollow cathode glow discharge plasma for detection of varied hydrocarbons was tested using acetone, ethanol, heptane, nitrobenzene, and toluene. Differences in fragmentation pathways, reflecting parent compound molecular structure, led to differences in optical emission patterns that can then potentially serve as signatures for the species of interest. Spectral simulations were performed emphasizing the CH (A~2Δ-X~2Π), CH (C~2Σ-X~2Π), and OH (A~2Σ+-X~2Π) electronic systems. The analytical utility of selected emission lines is demonstrated by a linear relationship between optical emission spectroscopy and parent compound concentration over a wide range, with detection limits extending down to parts per billion (ppb) levels.
机译：使用丙酮，乙醇，庚烷，硝基苯和甲苯测试了用于检测各种烃类的微空心阴极辉光放电等离子体的分析实用性。反映母体化合物分子结构的片段化途径的差异导致了光发射模式的差异，这些差异随后有可能成为目标物种的特征。进行了光谱模拟，重点是CH（A〜2Δ-X〜2Π），CH（C〜2Σ-X〜2Π）和OH（A〜2Σ+ -X〜2Π）电子系统。选定的发射谱线的分析用途通过光学发射光谱学和母体化合物浓度在宽范围内的线性关系得到证明，检测限可扩展至十亿分之几（ppb）的水平。

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