Jet REMPI for the detection of trace gas compounds in complex gas mixtures : a tool for kinetic research and incinerator process control
Jet REMPI for the detection of trace gas compounds in complex gas mixtures : a tool for kinetic research and incinerator process control
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Jet REMPI 用于检测复杂气体混合物中的痕量气体化合物：动力学研究和焚烧炉过程控制的工具
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
H. Grotheer
中科院分区：
文献类型：
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作者：
H. Oser;R. Thanner;H. Grotheer
通过动力学建模和在线监测的反馈控制可以实现焚烧炉中的火焰优化。过程控制的在线监测需要快速、选择性和灵敏的分析设备。本文介绍了一种共振增强多光子电离（REM PI）质谱计，它具有高灵敏度和低交叉灵敏度的特点。因此，它应该是一个有价值的工具，动力学研究和在线调查。仪器的灵敏度已经通过将电离机制移近样品束的连续部分（“射流”）而增加，这与分子束内更常规的电离相反。通过增加电离体积实现了灵敏度的进一步增益，这通过对离子源的完全重新设计而成为可能。通过使用防止离子/电子与表面碰撞的二次电离的几何结构来实现非常低的基线水平。这些改进导致了一个…
Flame optimization in incinerators is achievable by feedback control via kinetic modelling and on-line monitoring. On-line monitoring for process control requires a fast, selective and sensitive analytical device. In this paper a REM PI (Resonance Enhanced Multi Photon Ionization) mass spectrometer is presented which combines high sensitivity with very low cross-sensitivity. Consequently, it should be a valuable tool for both kinetic research and for on-line investigation. The sensitivity of the instrument has been increased by shifting the ionization regime close to the continuous portion (“jet”) of the sample beam as opposed to the more conventional ionization within the molecular beam. A further gain in sensitivity was achieved by increasing the ionization volume which was made possible by a complete re-design of the ion source. A very low base-line level is achieved by using a geometry which prevents secondary ionization by the collision of ions/electrons with surfaces. These improvements result in an...