CN109887829A - An ionization source device based on simultaneous detection of positive and negative ions of VUV lamp - Google Patents
An ionization source device based on simultaneous detection of positive and negative ions of VUV lamp Download PDFInfo
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- CN109887829A CN109887829A CN201711272617.9A CN201711272617A CN109887829A CN 109887829 A CN109887829 A CN 109887829A CN 201711272617 A CN201711272617 A CN 201711272617A CN 109887829 A CN109887829 A CN 109887829A
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- 150000002500 ions Chemical class 0.000 title claims abstract description 44
- 238000001514 detection method Methods 0.000 title abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 9
- 230000005684 electric field Effects 0.000 claims abstract 2
- 238000000605 extraction Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000001846 repelling effect Effects 0.000 claims 7
- 239000010453 quartz Substances 0.000 abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 12
- 239000011148 porous material Substances 0.000 abstract description 11
- 150000001450 anions Chemical class 0.000 abstract description 5
- 150000001768 cations Chemical class 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 1
- 238000001819 mass spectrum Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 2
- 229910052743 krypton Inorganic materials 0.000 description 2
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Electron Tubes For Measurement (AREA)
Abstract
The present invention designs mass spectrometer, open invent a kind of based on VUV lamp while detecting the ionization source devices of negative ions, the ionization source device is mainly made of the ion source of VUV lamp and two different modes, and specific structure includes two repulsion electrodes, two focusing electrodes and two pore electrods.The cardinal principle of the device is to devise the ion source of two different modes in ionized region, and vacuum-ultraviolet light, which is irradiated on metal electrode, first can generate photoelectron, and sample enters ionization chamber by quartz capillary.Photoelectron ionized sample generates cation and a small amount of anion, anion is generated by auxiliary reagent, apply different DC voltages on the Different electrodes of ionized region, generate different voltage differences, form two different ionized regions, in the region for forming negative electric field, the anion of ionization can flow to the region, it subsequently into mass analyzer, is detected by negative ion detector, then, the cation of ionization can flow into form positive electricity field areas, into quality aircraft, is detected by positive ion detection device, analyzed by mass spectrometer.
Description
Technical field
The invention belongs to mass spectrometer fields, are related to a kind of device based on VUV lamp negative ions while detection, are energy
Enough while various samples are tested, obtains more sample messages.
Background technique
Mass spectrum has been widely used as advanced analysis means of testing.It can not only quick test sample
Molecular weight, and can the chemical structure to sample reasonably speculated.Vacuum UV lamp ionization source has small in size, function
Low, the advantages that high sensitivity, the service life is long, and spectrogram is simple is consumed, complex sample analysis and detection are suitable for.Currently, traditional mass spectrum
It is all using positive ion source mode, the ion source test sample of negative ion mode and negative ions pattern switching, the sample of detection
Product are relatively simple, there is limitation to need to switch different modes for the sample of different complexity the sample surveyed, or
Detected using the mass spectrum of different mode, it is time-consuming and laborious, if can be to negative ions while detect, not only save the time,
Various Complex sample can be tested, without processes such as switchings, it is hereby achieved that more information.
In order to realize such target, the ion source of both of which is used in ionized region, is positive ion source respectively and negative
Ion source, vacuum UV lamp ionized sample are cation and anion, and then the ion of different mode enters corresponding ionized region
It is interior, it is detected by the detector of different mode, has been analyzed eventually by mass spectrometric measurement.A kind of method in this way, Ke Yitong
When more complicated sample, be more widely used.
Summary of the invention
It is an object of the invention to test various samples using flight time mass spectrum, more sample messages are obtained.For reality
Existing above-mentioned purpose, the technical solution of the present invention is as follows:
The ionization source device that the negative ions based on VUV lamp for mass spectral analysis detect simultaneously, including VUV lamp, repulsion
Electrode, extraction electrode and pore electrod.It is characterized in that there are the ion source of two different modes, different modes in ionization source
Ion can enter in different ionized regions, the ion of the detector of different mode detection associative mode, eventually by mass spectrum
Analyze sample.Operating procedure following (a) enters ionized region by quartz capillary (9) direct injected.The air pressure of ionized region is by stone
The length of English capillary controls.
(b) auxiliary reagent enters ionized region by auxiliary reagent import (10).
(c) VUV lamp (1) is lighted by high-voltage dc voltage.
(d) apply suitable DC voltage on repulsion electrode, extraction electrode, pore electrod.
Repulsion electrode, extraction electrode, internal diameter and outer diameter having the same, respectively 8mm and 1
2mm, the aperture of pore electrod are 2mm, outer diameter 14mm.
(e) circular hole is respectively equipped on two repulsion electrodes.
(f) quartz capillary (9) enters in ionized region by circular hole, and auxiliary reagent enters ionization by another circular hole
Area.
(g) sample enters ionized region by quartz capillary, passes through VUV lamp ionized sample.
(h) quartz capillary (9) internal diameter is 75~200 μm.
(i) the VUV lamp described in can be commercialization low pressure krypton lamp.
(j) apply different DC voltages on repulsion electrode, extraction electrode and pore electrod.
Method provided by the present invention, using ionization chamber two different modes ion source test various samples, one
The repulsion electrode of a ion source, extraction electrode, the voltage that pore electrod applies are gradually reduced, and negative potential are formed, by auxiliary reagent
Then the negative ion electrospray of generation is detected from entering in the ionization source to form negative potential by negative ion detector.Another electricity
The DC voltage that repulsion electrode from source, extraction electrode and pore electrod apply is gradually increased, and forms positive potential, the cation of ionization
It enters in the ionization source to form positive potential, is then detected by positive ion detection device, finally by mass spectral analysis sample.With biography
The ionization source of the Mass Spectrometer Method sample of system is compared, and this method can detecte various samples, analyzes more samples.
Detailed description of the invention
Fig. 1 is the ionization source schematic device of the invention detected simultaneously based on VUV lamp negative ions.
Fig. 2 is the structural schematic diagram for the portable flight time mass spectrum that the present invention uses.
Specific embodiment
Embodiment
Referring to Fig. 1, for structural schematic diagram of the invention, including VUV lamp 1, the first, second repulsion electrode 4,5, first,
Second extraction electrode 3,6, the first, second pore electrod 2,7, quartz capillary 9, auxiliary reagent import 10,
The light that VUV lamp 1 issues is incident in ionization source chamber 8, in forming ionized region in ionization source chamber 8,
2 ion transmission channels are equipped in ionization source chamber, ion transmission channel is had the plate of ion through-hole by middle part
Repulsion electrode, middle part are successively spaced with plate extraction electrode, the pore electrod of ion through-hole, parallel, through-hole is coaxially disposed；
In 2 pore electrods far from extraction electrode side be equipped with it is opposite with the through-hole on pore electrod for be connected with mass spectrum injection port from
Subexit；
End face of the repulsion electrode middle through-hole far from extraction electrode side is towards ionized region.
The negative ions of ionization enter in the ionized region of different mode, are detected by the detector of different mode.
The step of detecting negative ions is as follows:
(a) ionized region is entered by 9 direct injected of quartz capillary.The air pressure of ionized region by quartz capillary length control
System.
(b) VUV lamp 1 is lighted by high-voltage dc voltage.
(c) in repulsion electrode, extraction electrode applies suitable voltage on Skimmer electrode.
(d) sample is entered in ionized region by quartz capillary 9, VUV lamp ionized sample.
(e) 9 internal diameter of quartz capillary is 75~200 μm.
(f) the VUV lamp described in can be commercialization low pressure krypton lamp.
(g) apply different DC voltages on repulsion electrode, extraction electrode and Skimmer electrode, DC4, DC5, DC6's
Voltage is respectively 20V, after 21V and 23V, forms negative potential, and the anion of detection enters in the ionized region, DC1, DC2 and DC3's
Voltage is respectively 18V, 17V, 15V, forms positive potential, the cation detected enters in the ionized region, by positive ion mode
Detector detects.
Fig. 2 is the structural schematic diagram of portable flight time mass spectrum.Including ionized region 1, transmission range 2, field-free flight area 3,
Reflector 4, negative ion detector 5.Similarly mass spectrum 1 is same structure, is not uniquely both detector using just
Ion mode detector.Mass spectrum ionization mode takes Single-photon ionization, and transmission range is made of electrostatic lenses, improves transmission effect
Rate.Field-free flight area takes orthogonal acceleration to design, using MCP as detector.Ionized region operating air pressure range is 2Pa~10pa, electricity
From the length adjustment air pressure that area uses quartz capillary, input mode is quartz capillary sample introduction, and capillary inner diameter is 100 μm.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272617.9A CN109887829A (en) | 2017-12-06 | 2017-12-06 | An ionization source device based on simultaneous detection of positive and negative ions of VUV lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272617.9A CN109887829A (en) | 2017-12-06 | 2017-12-06 | An ionization source device based on simultaneous detection of positive and negative ions of VUV lamp |
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| Publication Number | Publication Date |
|---|---|
| CN109887829A true CN109887829A (en) | 2019-06-14 |
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| CN201711272617.9A Pending CN109887829A (en) | 2017-12-06 | 2017-12-06 | An ionization source device based on simultaneous detection of positive and negative ions of VUV lamp |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110648898A (en) * | 2019-08-16 | 2020-01-03 | 上海裕达实业有限公司 | Mass spectrometry device and method for detecting multicomponent gas in freeze-drying process |
| CN112420482A (en) * | 2020-11-12 | 2021-02-26 | 清华大学深圳国际研究生院 | Pulse sample introduction device and method |
| CN114005722A (en) * | 2021-12-30 | 2022-02-01 | 浙江迪谱诊断技术有限公司 | Digital ion detection method and device of mass spectrometry detection equipment |
| CN119601452A (en) * | 2024-11-26 | 2025-03-11 | 山东大学 | A mass spectrometry ionization source for online detection of gas composition at the outlet of an aircraft engine combustion chamber |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040011952A1 (en) * | 2000-06-09 | 2004-01-22 | Johnston Murray V. | System and method for chemical analysis using laser ablation |
| CN102568997A (en) * | 2011-02-15 | 2012-07-11 | 上海大学 | Bipolar reflection-type flight time mass analyzer |
| 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 windowless ionization source for mass spectrometry |
-
2017
- 2017-12-06 CN CN201711272617.9A patent/CN109887829A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040011952A1 (en) * | 2000-06-09 | 2004-01-22 | Johnston Murray V. | System and method for chemical analysis using laser ablation |
| CN102568997A (en) * | 2011-02-15 | 2012-07-11 | 上海大学 | Bipolar reflection-type flight time mass analyzer |
| 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 windowless ionization source for mass spectrometry |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110648898A (en) * | 2019-08-16 | 2020-01-03 | 上海裕达实业有限公司 | Mass spectrometry device and method for detecting multicomponent gas in freeze-drying process |
| CN112420482A (en) * | 2020-11-12 | 2021-02-26 | 清华大学深圳国际研究生院 | Pulse sample introduction device and method |
| CN112420482B (en) * | 2020-11-12 | 2022-05-17 | 清华大学深圳国际研究生院 | Pulse sample introduction device and method |
| CN114005722A (en) * | 2021-12-30 | 2022-02-01 | 浙江迪谱诊断技术有限公司 | Digital ion detection method and device of mass spectrometry detection equipment |
| CN119601452A (en) * | 2024-11-26 | 2025-03-11 | 山东大学 | A mass spectrometry ionization source for online detection of gas composition at the outlet of an aircraft engine combustion chamber |
| CN119601452B (en) * | 2024-11-26 | 2025-09-19 | 山东大学 | A mass spectrometry ionization source for online detection of combustion gas components at the outlet of an aircraft engine combustion chamber |
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Application publication date: 20190614 |
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