CN109887831B - Method for slowing down attenuation of ion source in ionization region of mass spectrum - Google Patents
Method for slowing down attenuation of ion source in ionization region of mass spectrum Download PDFInfo
- Publication number
- CN109887831B CN109887831B CN201711274236.4A CN201711274236A CN109887831B CN 109887831 B CN109887831 B CN 109887831B CN 201711274236 A CN201711274236 A CN 201711274236A CN 109887831 B CN109887831 B CN 109887831B
- Authority
- CN
- China
- Prior art keywords
- mgf
- glass sheet
- vacuum ultraviolet
- vuv lamp
- lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a method for slowing down the attenuation of an ion source in an ionization region of a mass spectrum, which comprises a lampshade, a vacuum ultraviolet VUV lamp and MgF2Glass sheet, O-shaped ring, and electrode sheet. The vacuum ultraviolet VUV lamp is fixed inside the lampshade and MgF2An O groove is arranged on the glass sheet and is sealed with the electrode plate by utilizing an O-shaped ring. The vacuum ultraviolet VUV lamp is arranged at MgF2On glass sheets of MgF2The glass sheet separates the vacuum ultraviolet VUV lamp from the electrode sheet, i.e. from the ionization region of the mass spectrum.
Description
Technical Field
The invention is mainly applied to a vacuum ultraviolet VUV lamp ion source in a mass spectrum ionization region, in particular to a method for slowing down the attenuation of the ion source in the mass spectrum ionization region, and partial sample ions and electrons generated in the ionization region are enabled to adsorb MgF (magnesium fluoride)2The glass sheet is prevented from being directly adsorbed on the surface of the vacuum ultraviolet VUV lamp window to cause attenuation, and meanwhile, the service life of the vacuum ultraviolet VUV lamp can be prolonged.
Background
Mass spectrometry detection techniques have received much attention because of their good qualitative and quantitative capabilities. The compound sample is identified by ionizing, separating and detecting ions, and abundant molecular structure information of the sample can be provided. Among many analytical detection methods, the mass spectrometric detection method is a general method having both high sensitivity and high efficiency. The ion source is one of the core components of mass spectrometry for ionizing sample molecules. Electron Impact (EI) ionization source is the most widely used ion source for mass spectrometry, but the energy of the EI source electrons is 70eV, and a large amount of fragment ions are generated after collision with sample molecules, so that the overlapping spectra of the peaks are difficult to identify. In recent years, the technology of taking the vacuum ultraviolet VUV lamp as the ion source is rapidly developed, and the vacuum ultraviolet VUV lamp has the characteristics of small volume, simple structure and convenient operation and is successfully applied to the rapid detection of volatile organic compounds. But causes contamination of the optical window during continuous operation so that it cannot be directly applied to a long-term on-line monitoring process. The radio frequency discharge VUV lamp without the optical window can make up for the problem, but the radio frequency discharge VUV lamp without the optical window can be used in the actual use processThe discharge gas must be continuously introduced, which is not favorable for the integration and portability of the device. For the above reasons, a method for slowing down the attenuation of a mass spectrometry ion source has been developed, which has the following characteristics: 1. the vacuum ultraviolet VUV lamp generates a light beam which passes through MgF2The glass sheet enters a mass spectrum ionization region, and sample ions and electrons are directly adsorbed on MgF2The glass sheet thereby prevents the vacuum ultraviolet VUV lamp window from being contaminated.
2.MgF2The glass sheet can be replaced at any time to ensure the transmittance of ultraviolet light.
Disclosure of Invention
The invention is mainly applied to the reduction of mass spectrum ion source attenuation, and adopts the following technical scheme:
a method for slowing down the attenuation of an ion source in an ionization region of a mass spectrum comprises a lampshade, a vacuum ultraviolet VUV lamp and MgF2Glass sheet, O-shaped ring, and electrode sheet. The vacuum ultraviolet VUV lamp is fixed inside the lampshade and MgF2The glass sheet is arranged on the electrode sheet and sealed by an O-shaped ring, and the vacuum ultraviolet lamp is arranged on the MgF2And (4) glass sheets. MgF2The glass sheet separates the vacuum ultraviolet VUV lamp from the mass ionization region. The ultraviolet light generated by the vacuum ultraviolet VUV lamp can penetrate MgF2The glass sheet is continuously irradiated in the ionization region of the mass spectrum, and MgF is adopted at the same time2The thickness of the glass sheet can be adjusted as desired. The vacuum ultraviolet VUV lamp ionizes sample molecules introduced into the ionization region of the mass spectrum to generate sample ions, and the sample ions generated by ionization are transmitted downwards under the action of an electric field. And a few sample ions and electrons generated after ionization of sample molecules can be adsorbed on the surface of the VUV lamp, so that a lamp window is polluted, and the service life is shortened. Mounting a vacuum ultraviolet VUV lamp on the MgF2The glass sheet can effectively prevent sample ions or electrons from being directly adsorbed on the surface of the VUV lamp. MgF2The glass sheet can be replaced at any time to ensure the transmittance of the vacuum ultraviolet VUV lamp, and the service life of the lamp is effectively prolonged.
Drawings
FIG. 1 is a schematic diagram of a method of mitigating ion source decay in the ionization region of mass spectrometry; 1-lampshade, 2-vacuum ultraviolet VUV lamp and 3-MgF2Glass sheet, 4-O-shaped ring and 5-electrode sheet。
FIG. 2 is a view showing the mounting of MgF2And (3) detecting a mass spectrogram of the glass sheet.
FIG. 3 is a view showing that MgF is not mounted2Mass spectra of the glass sheets.
Detailed Description
The method comprises a lampshade, a vacuum ultraviolet VUV lamp and MgF from top to bottom in sequence2Glass sheet, O-shaped ring and electrode sheet. The vacuum ultraviolet VUV lamp is fixed inside the lampshade and MgF2The glass sheet is arranged on the electrode sheet and sealed by using an O-shaped ring groove, and the vacuum ultraviolet VUV lamp is arranged on the MgF2And (4) glass sheets. MgF2The glass sheet separates the vacuum ultraviolet VUV lamp from the mass ionization region. The vacuum ultraviolet VUV lamp ionizes sample molecules introduced into the ionization region of the mass spectrum to generate sample ions, and the sample ions generated by ionization are transmitted downwards under the action of an electric field. And a few sample ions and electrons generated after ionization of sample molecules can be adsorbed on the surface of the VUV lamp, so that a lamp window is polluted, and the service life is shortened. Mounting a vacuum ultraviolet VUV lamp on the MgF2The glass sheet can effectively prevent sample ions or electrons from being directly adsorbed on the surface of the VUV lamp. MgF in the method2The glass sheet can effectively transmit light generated by the VUV lamp, and simultaneously, the surface pollution of the lamp window is avoided, and the service life of the lamp is prolonged.
The test results are shown in the attached drawings, and FIG. 2 shows the mounting of MgF2FIG. 3 is a graph showing a mass spectrum of a glass plate without MgF2Mass spectra of the glass sheets.
Claims (6)
1. The utility model provides a method of slowing down mass spectrum ionization region ion source decay adopts vacuum ultraviolet VUV lamp (2) as the ionization source, and the emergent light that sends by vacuum ultraviolet VUV lamp (2) optical window penetrates the through-hole in electrode slice (5) middle part and jets into mass spectrum ionization region which characterized in that: MgF is arranged between the light window of the vacuum ultraviolet VUV lamp (2) and the electrode plate (5)2Glass sheet (4), emergent light MgF emitted by vacuum ultraviolet VUV lamp (2) light window2The glass sheet (4) is shot into a mass spectrum ionization region through a through hole in the middle of the electrode sheet (5); MgF2The glass sheet (4) can be replaced at any time, the transmittance of the vacuum ultraviolet VUV lamp (2) is ensured, and the service life is prolonged effectivelyThe service life of the lamp is prolonged.
2. The method of claim 1, wherein:
the vacuum ultraviolet VUV lamp (2) is fixed inside the lampshade (1) and MgF2The glass sheet (4) is arranged above the through hole of the electrode sheet (5) and is arranged on the MgF2A sealing O-shaped ring (3) is arranged between the glass sheet (4) and the electrode sheet (5), and a vacuum ultraviolet lamp (2) is arranged at MgF2On the glass sheet (4), the light window faces the MgF2The upper surface of the glass sheet (4); MgF2The glass sheet (4) separates the vacuum ultraviolet VUV lamp (2) from the mass spectrometry ionization region.
3. The method according to claim 1 or 2, characterized in that:
light window facing MgF2A sealing O-shaped ring is arranged between the upper surfaces of the glass sheets (4).
4. The method of claim 1, wherein:
the ultraviolet light generated by the vacuum ultraviolet VUV lamp (2) can penetrate MgF2The glass sheet (4) is continuously irradiated in the ionization region of the mass spectrum, and MgF is adopted at the same time2The thickness of the glass sheet (4) can be adjusted as required.
5. The method of claim 1, wherein:
the vacuum ultraviolet VUV lamp (2) ionizes sample molecules introduced into the ionization region of the mass spectrum to generate sample ions, and the sample ions generated by ionization are transmitted downwards under the action of an electric field; a few sample ions and electrons generated after ionization of sample molecules can be adsorbed on the surface of the VUV lamp (2), so that a lamp window is polluted, and the service life is shortened; mounting a vacuum ultraviolet VUV lamp (2) on the MgF2The glass sheet (4) can effectively prevent sample ions or electrons from being directly adsorbed on the surface of the VUV lamp (2).
6. The method of claim 1, wherein:
the ionization region of the mass spectrum is a vacuum cavity of MgF2The O-shaped ring (3) on the glass sheet (4) can realize sealing, and the vacuum ultraviolet VUV lamp (2) is arranged on the MgF2The glass sheet (4) is separated from the vacuum cavity of the ionization region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711274236.4A CN109887831B (en) | 2017-12-06 | 2017-12-06 | Method for slowing down attenuation of ion source in ionization region of mass spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711274236.4A CN109887831B (en) | 2017-12-06 | 2017-12-06 | Method for slowing down attenuation of ion source in ionization region of mass spectrum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109887831A CN109887831A (en) | 2019-06-14 |
| CN109887831B true CN109887831B (en) | 2020-10-02 |
Family
ID=66923471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711274236.4A Active CN109887831B (en) | 2017-12-06 | 2017-12-06 | Method for slowing down attenuation of ion source in ionization region of mass spectrum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109887831B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007309879A (en) * | 2006-05-22 | 2007-11-29 | Horiba Ltd | Mass spectrometer |
| CN101567297A (en) * | 2008-04-25 | 2009-10-28 | 中国科学院生态环境研究中心 | High-flux electrodeless vacuum ultraviolet light source |
| CN102662018A (en) * | 2010-11-30 | 2012-09-12 | 中国科学院大连化学物理研究所 | Photo ionization detector |
| CN104707816B (en) * | 2013-12-13 | 2017-01-25 | 中国科学院大连化学物理研究所 | On-line self-cleaning method for vacuum ultraviolet lamp |
| CN104716012B (en) * | 2013-12-15 | 2017-02-15 | 中国科学院大连化学物理研究所 | Device used for reducing light window surface pollution |
| CN104716008A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Radio-frequency discharge VUV composite ionization source used for mass spectrometry |
| CN106206239B (en) * | 2016-09-27 | 2020-06-30 | 北京印刷学院 | High-efficient combination formula atmospheric pressure ionization source |
| CN206271659U (en) * | 2016-10-26 | 2017-06-20 | 广西电网有限责任公司电力科学研究院 | A kind of windowless mass spectrum ionization source |
| CN106373857B (en) * | 2016-10-28 | 2017-12-08 | 中国科学院生态环境研究中心 | Protonation enhancing MALDI |
-
2017
- 2017-12-06 CN CN201711274236.4A patent/CN109887831B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| Photoionization-Generated Dibromomethane Cation Chemical Ionization Source for Time-of-Flight Mass Spectrometry and Its Application on Sensitive Detection of Volatile Sulfur Compounds;Jiang, Jichun等;《ANALYTICAL CHEMISTRY》;20160517;5028-5032页 * |
| 一种新型光电离/微型正交加速飞行时间质谱仪的设计和性能测试;侯可勇等;《分析化学》;20061230;1807-1812页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109887831A (en) | 2019-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2738053C (en) | Photoemission induced electron ionization | |
| US6797943B2 (en) | Method and apparatus for ion mobility spectrometry | |
| CN102479662B (en) | Vacuum ultraviolet light ionization source used for high-flux gas sample analysis | |
| US20110278447A1 (en) | Photoemission induced electron ionization | |
| WO2005096342A3 (en) | Method and apparatus for ion fragmentation by electron capture | |
| CN109841484B (en) | Photoionization mass spectrometry device and method for qualitatively and quantitatively analyzing isomer mixture | |
| JP2014526769A (en) | Tandem mass spectrometer and tandem mass spectrometry method | |
| CN104716010A (en) | Vacuum ultraviolet photoionization and chemical ionization compound ionization source based on radio frequency electric field enhancement of quadrupole rod | |
| CN108091545B (en) | A kind of ultraviolet light ionization source for mass spectral analysis | |
| CN102479660A (en) | Ultraviolet lamp ionizing device | |
| CN109887831B (en) | Method for slowing down attenuation of ion source in ionization region of mass spectrum | |
| CN104716009A (en) | Composite ionization source based on vacuum ultraviolet light ionization and atmospheric pressure ionization | |
| CN105655226B (en) | A kind of vacuum ultraviolet ionized and chemi-ionization composite ionization source | |
| CN114166927A (en) | Mass spectrum device detection method for detecting multi-component sample | |
| CN106206239B (en) | High-efficient combination formula atmospheric pressure ionization source | |
| CN103295872A (en) | Compound ion source device and mass spectrometer | |
| CN201152867Y (en) | Infrared laser desorption/vacuum ultraviolet single photon ionization mass spectrometry analytical equipment | |
| CN111199862B (en) | Capillary micro-area ionization source | |
| CN109449074B (en) | Ion extraction device for ionization source of mass spectrometer | |
| CN112185801B (en) | Novel photoelectric composite ion source | |
| CN209843660U (en) | Composite ion source and mass spectrometer | |
| CN116031138A (en) | Gas-phase pollutant all-species high-sensitivity online mass spectrometer and detection method | |
| CN112908831B (en) | Laser analysis radio frequency discharge chemical ionization source under atmospheric pressure | |
| CN114300337A (en) | Photoionization-quadrupole mass spectrometry system | |
| CN114388340A (en) | Array type ion source for mass spectrum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |