Category : Ionisation - Wikimedia
2018年7月30日 · Electron Ionization Ion Source.jpg 650 × 638; 51 KB. Electron Ionization Source.jpg 648 × 645; 49 KB. Electron Ionization.svg ... 10 KB. Estados de agregación y sus cambios.svg 1,024 × 768; 7.89 MB. Ethane impact ionization 2.gif 182 × 212; 19 KB. Ethane impact ionization.gif 193 × 212; 22 KB. Explosive C5 calcium flare captured by ...
8: Schematic of Electron Impact Ionisation. - ResearchGate
With more resolving power than TOF, the Orbitrap utilizes an ion trap to analyze mass by trapping ions between an outer barrel-shaped electrode and an inner rod-shaped electrode. Ions orbit around...
CHE401 Coursework 1 – Mass Spectrometry - CSDN博客
The electron impact source was a pulsed source used with a TOF mass analyser. If the flight tube were 1.0 m long and the accelerating voltage were 3000 V, what would the flight time be for the ion at m/z = 58?
离子源1-电子电离 - 知乎 - 知乎专栏
电子电离是GC-MS中最常用的离子源，这一章对其进行一个介绍。 电子电离（electron impact, EI）是由Dempster最先设计的，后来经过Bleakney和Nier改进，并且成功应用于气相分子的离子化。 （引自 Edmond de Hoffman…
电子轰击离子源 - 百度百科
电子轰击离子源是采用高速（高能）电子束冲击样品，从而产生电子和分子离子M+，M+继续受到电子轰击而引起化学键的断裂或分子重排，瞬间产生多种离子。 离子源是质谱仪器的“心脏 。 按电离方式分成电子轰击源、 化学电离源 、场致电离源等。 其中慢电子轰击源 是使用最广泛的气体离子源。 离子源的性能直接影响着质谱仪器两个关键指标即灵敏度和分辨本领的高低。 因此在质谱仪器中除了要求离子源工艺性能好，使用寿命长、 价格 低廉之外，主要是对以下指标感兴 …
Schematic diagram of the electron impact ion source
These electron impact (EI) processes are capable of producing hot O atoms via the predissociation of CO2 and CO2+ in electronically excited states.
Schematic of several common sources of primary beam (a) electron impact …
Download scientific diagram | Schematic of several common sources of primary beam (a) electron impact (b) liquid metal ion gun –field ionisation source and (c) surface ionisation, after ...
The Action of a Photomultiplier Tube : r/physicsgifs - Reddit
2020年6月20日 · It is shown in this gif ;) An ionizing particle enters the scintillator, excites an electron which rapidly decays by emitting a photon emits which hits the photocathode where an electron is emitted thanks to photoelectric effect. The dynodes are each at a higher potential, around 100V more for each dynode.
Introducing the new electron impact ionization source design for …
This presentation outlines the principles of the new source design which, compared to other designs, is able to increase between 10 and 20 fold the number of ions produced from a given number of neutral species entering the source region. The increase in ion numbers improves the relative ion statistics which in turn improves the detection limit ...
Ionization Modes: EI - SHIMADZU CORPORATION
EI is the most widely used ionization mode in GC/MS analysis. Almost all commercial GCMS instruments equip this mode as standard ionization. EI causes much fragmentation of a molecule whose spectral pattern is useful for identifying sample compound. Library search is available.
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