CN202454525U - Compound ion source device and mass spectrometer - Google Patents
Compound ion source device and mass spectrometer Download PDFInfo
- Publication number
- CN202454525U CN202454525U CN201220079088.7U CN201220079088U CN202454525U CN 202454525 U CN202454525 U CN 202454525U CN 201220079088 U CN201220079088 U CN 201220079088U CN 202454525 U CN202454525 U CN 202454525U
- Authority
- CN
- China
- Prior art keywords
- ion source
- chamber
- source apparatus
- ultraviolet
- electrode
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Electron Tubes For Measurement (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The utility model provides a compound ion source device and a mass spectrometer. The compound ion source device comprises a casing, an electron impact ion source installed in the casing and at least one ultraviolet source for generating ultraviolet light. At least one light-transmitting hole is arranged on an ionization chamber, each light-transmitting hole corresponds to the position where the corresponding ultraviolet light source irradiates, the light-transmitting holes are arranged between a repelling electrode and an intruding electrode, and a focusing lens is installed on an irradiating light path of each ultraviolet source and close to the light-transmitting holes. The mass spectrometer is provided with the compound ion source device. By means of the ionization chamber, a sample feeding tube, an ion lens and the ultraviolet light sources in the electron impact ion source, a photon bombardment ion source device is formed. Users can choose to use the electron impact ion source device or the photon bombardment ion source device or both the electron impact ion source device and the photon bombardment ion source device according to types of samples to be tested.
Description
Technical field
The utility model relates to a kind of ion source device and mass spectrometer that makes sample molecule change into ion.
Background technology
Ion source device is mainly used in mass spectrometer, and it mainly acts on is to make sample molecule change into ion.The ion source device that more generally uses at present is the electron impact ion source device; Its structure comprises housing, be arranged on the chamber in the housing and be used to produce the filament of electronics; Ion lens is installed in the chamber; Ion lens comprises repulsion electrode, introducing electrode, collector electrode and the extraction electrode on the center line that is installed in ion lens successively, and sample feeding pipe and sample export are installed on chamber.Sample molecule to be analyzed is introduced chamber by the sample feeding pipe, and the electron bombard sample molecule that filament produces makes sample molecule change into charged ion.We know, at home, in the outer general electron impact ion source device, the energy of bombardment electronics is generally about 70eV; The kinetic energy of the sample ions that forms behind the bump sample molecule is very big; Such sample ions is collided each other with other neutral particles or ion in flight course and is prone to be cracked into a large amount of fragment ions, thereby causes the final spectrogram that forms very complicated, and (sample molecule gets into ionization chamber in mass spectral analysis to be difficult to tell the molecular ion peak of sample; After bombarding an electronics; The cation that forms is called molecular ion, and the peak of generation is called molecular ion peak, also claims parent peak.In general the peak of biggest quality number is exactly a molecular ion peak, and its quality is exactly a molecular weight).Say that from another angle the electron impact ion source device can produce fragment ion peak, on the structure of research molecule, have certain advantage.
Based on the defective of above-mentioned electron impact ion source device, a kind of photon bombardment ion source device has appearred, and the difference of itself and electron impact ion source device is: use ultraviolet light photons to bombard sample molecule.We know that the photon energy of ultraviolet light is that 70eV is much lower than electron energy about 10eV; Therefore; The kinetic energy of the sample ions that sample molecule forms after the ionization in the ultraviolet light photons bombardment is smaller, even such sample ions is collided with other neutral particles or ion in flight course each other, also is not easy to form fragment ion; So; Use the final spectrogram that forms of photon bombardment ion source device simple, overlap peak is few, can realize the fast qualitative and the quantitative analysis of molecular weight.But also smaller just because of the photon energy of ultraviolet light, so the photon of ultraviolet light is powerless greater than the sample molecule of photon energy for ionization energy, so the photon bombardment ion source device is confined to the analysis of some specific sample molecule.
In the conventional art, also there is the people once to attempt the photo ionization mode is applied to ion trap mass spectrometer, still; Because the ionization process and the quality analysis process of ion trap occur in the same cavity; Be easy to cause the pollution of mass spectra peak, therefore, be difficult to operation and use in the reality.
The utility model content
The purpose of the utility model is to solve the defective of existing ion source device, and a kind of compound ion source apparatus and mass spectrometer that has electron bombard function and photon bombardment function concurrently is provided.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
The utility model compound ion source apparatus; Comprise: housing and be installed in chamber, the ion lens in the said housing and be installed in outer at least one filament that is used to produce electronics of said chamber; The sample export that the sample feeding pipe is installed on the wherein said chamber and aligns with said sample feeding pipe; Said chamber is provided with respectively and enters the mouth with the corresponding electronics of said filament, and said ion lens comprises repulsion electrode also parallel to each other on the center line that is installed in this ion lens successively, introduces electrode, collector electrode and extraction electrode; Wherein, Said repulsion electrode is installed in the said chamber; Said introducing electrode, collector electrode and extraction electrode are installed in outside the said chamber; Said compound ion source apparatus comprises that also at least one is used to produce the ultraviolet source of ultraviolet light; Have at least one loophole between said repulsion electrode and introducing electrode on the said chamber, each said loophole is corresponding with corresponding said ultraviolet source irradiation position, and a condenser lens is installed in also contiguous said loophole position on the illumination path of each said ultraviolet source.
Further, the quantity of said filament is two, is distributed in the two opposite sides of said chamber, and the line at said two filament centers is vertical with the center line of said ion lens.
The quantity of said ultraviolet source is two, is distributed in the two opposite sides of said chamber, and the line at said two ultraviolet source centers is vertical with the center line of said ion lens.
The quantity of said ultraviolet source is two; Be distributed in the two opposite sides of said chamber; The line at said two ultraviolet source centers is vertical with said sample feeding pipe, and the line at the line at said two ultraviolet source centers and said two filament centers is orthogonal.
Said condenser lens is installed in the said loophole.
The inner surface of said chamber is the curve form of rounding off.
The inner surface of said chamber is spherical in shape.
The focus of said condenser lens is positioned on the center line of said ion lens.
The inwall of said chamber is provided with reflecting coating, and said repulsion electrode outer surface is provided with reflecting coating.
The utility model mass spectrometer comprises quadrupole rod mass analyzer and compound ion source apparatus, and wherein, said compound ion source apparatus is the described compound ion source apparatus of the utility model.
Can know by technique scheme; Compound ion source apparatus of the utility model and mass spectrometric advantage and good effect are: in the utility model compound ion source apparatus; At least one filament that is used to produce electronics by chamber, ion lens, sample feeding pipe has formed an electron impact ion source device, on this basis, has increased at least one ultraviolet source again; The ultraviolet light that ultraviolet source produces incides the chamber internal irradiation sample molecule of electron impact ion source; Thereby make sample molecule be converted into ion, and photon is constantly reflected recycling in bombardment sample molecule process; Realize the enrichment of photon, improved sensitivity for analysis.Therefore, chamber, sample feeding pipe and the ion lens in the electron impact ion source device adds that ultraviolet source has formed the photon bombardment ion source device in the utility model.Particularly also be provided with condenser lens in the compound ion source apparatus of the utility model, condenser lens focuses on the ultraviolet light that ultraviolet source sends, and can effectively improve the light quantity that gets into chamber, thereby improves the ionizing efficiency of sample molecule.Therefore, in the utility model, can use electron impact ion source device or photon bombardment ion source device according to the type selecting of sample to be tested, perhaps the two uses simultaneously.
With reference to the accompanying drawing description of a preferred embodiment, above-mentioned and other purpose of the utility model, feature and advantage will be more obvious through following.
Description of drawings
Fig. 1 is the perspective view of the utility model compound ion source apparatus first embodiment, in order to know show internal structure, and the chamber of only having drawn half, wherein condenser lens is installed on the chamber;
Fig. 2 is the perspective view of the utility model compound ion source apparatus first embodiment, in order to know show internal structure, and the chamber of only having drawn half, wherein condenser lens is installed in the chamber outside;
Fig. 3 is the perspective view of the utility model compound ion source apparatus second embodiment, in order to know show internal structure, and the chamber of only having drawn half, wherein condenser lens is installed on the chamber;
Fig. 4 is the perspective view of the utility model compound ion source apparatus second embodiment, in order to know show internal structure, and the chamber of only having drawn half, wherein condenser lens is installed in the chamber outside.
Embodiment
To describe the specific embodiment of the utility model below in detail.Should be noted that the embodiments described herein only is used to illustrate, be not limited to the utility model.
As depicted in figs. 1 and 2, first of the utility model compound ion source apparatus implements to comprise housing 1 and the electron impact ion source device that is installed in the housing 1, and the photon bombardment ion source device.
Housing 1 is connected with vacuum extractor, so have certain vacuum degree in the housing 1, vacuum degree is 1.3 * 10-4～1.3 * 10-5Pa usually.
The electron impact ion source device comprises a pair of filament 3 that is installed in chamber 2, the ion lens in the housing 1 and is used to produce electronics.A pair of filament 3 is distributed in the two opposite sides outside the chamber 2, and vertical with sample feeding pipe 4.Certainly, filament 3 also can only be used one or more.Have an electronics inlet (not shown) corresponding to each filament 3 on the chamber 2, the electronics that produces for filament 3 passes and gets in the chamber 2.
Ion lens comprises repulsion electrode 21 also parallel to each other on the center line that is installed in this ion lens successively, introduces electrode 22, collector electrode 23 and extraction electrode 24; It is tabular that each electrode all is, and each electrode has center through hole at the ion lens position of center line.Wherein repulsion electrode 21 is installed in the chamber 2, introduce electrode 22, collector electrode 23 and extraction electrode 24 and be installed in chamber 2 outsides, each electrode can through the insulated column (not shown) be installed on the chamber 2 or housing 1 on.Sample feeding pipe 4 is installed on the chamber 2, and has sample export 25, sample feeding pipe 4 and sample export 25 all are arranged on the center line of ion lens.
During use, the sample molecule of gas phase is introduced in the chamber 2 by sample feeding pipe 4; The electronics that filament 3 produces is entered in the chamber 2 by the electronics inlet, and the bombardment sample molecule, makes it be converted into sample ions.
In order to form the photon bombardment ion source device, the utility model also comprises a ultraviolet source 5, and ultraviolet source 5 can adopt conventional lighting sources.On chamber 2, has a loophole 26; Loophole 26 is corresponding with ultraviolet source 5 irradiation positions; And loophole 26 is between repulsion electrode 21 and introducing electrode 22; Condenser lens 6 (see figure 1)s are installed in loophole 26, and condenser lens 6 also can be installed in chamber 2 outsides and contiguous loophole 26 position (see figure 2)s.Like this, incide in the chamber 2 after the ultraviolet light line focus lens 6 that send of ultraviolet source 5 converge.The ultraviolet light that incides in the chamber 2 can reflect on the inner surface of chamber 2 and repulsion electrode 21, when running into ionization energy less than the sample molecule of photon energy, just has certain probability can make sample molecule change into ion.In order to improve the Ionization Efficiency of sample molecule, can the focus of condenser lens 6 be designed on the center line of ion lens; Can also the inner surface of chamber 2 be designed to the curve form of rounding off, particularly the inner surface with chamber 2 is designed to sphere, to increase ultraviolet reflection of light uniformity and order of reflection; Further, can also apply reflecting coating, increase anti-film etc. like optics at inwall and each electrode surface of chamber 2.Just formed the photon bombardment ion source device by ultraviolet source 5, condenser lens 6, chamber 2 and the ion lens, the sample feeding pipes 4 that are installed in the chamber 2.Certainly, the quantity of photon bombardment ion source device medium ultraviolet light source 5 is not limited to one, also can be a plurality of, for example can two ultraviolet sources 5 be set symmetrically in chamber 2 two opposite sides, correspondingly, on chamber 2, offers two loopholes.
During use, the sample molecule of gas phase is introduced in the chamber 2 by sample feeding pipe 4; Incide in the chamber 2 after the ultraviolet light line focus lens 6 that ultraviolet source 5 sends focus on, sample molecule is shone, make it be converted into sample ions.
Among the utility model first embodiment; Two filaments 3 are set in the electron impact ion source device; When two ultraviolet sources 5 are set in the photon bombardment ion source device; Preferred arrangement is: the line at the center of the line at the center of two ultraviolet sources 5 and two filaments 3 is orthogonal, and all the center line with ion lens is vertical.Like this, help reducing electronics and photon influencing each other on motion path when using electron bombard pattern and photon bombardment pattern at the same time, and structurally also relatively symmetrical, attractive in appearance.
Like Fig. 3 and shown in Figure 4, second of the utility model compound ion source apparatus implements to comprise housing 1 and the electron impact ion source device that is installed in the housing 1, and the photon bombardment ion source device.This second is implemented difference with first embodiment only the shape in chamber 2 is different, promptly second implements intermediate ion chamber 2 and is rectangular-shaped, compares with the chamber 2 of first embodiment sphere, and the reflection path of ultraviolet light in chamber 2 is different.Among this second embodiment all the other are implemented identical part with first, repeat no more here.
In the compound ion source apparatus of the utility model; Ion lens, sample feeding pipe 4 in the shared chamber 2 of photon bombardment ion source device and electron impact ion source device; In same chamber 2, can realize two kinds of ionization modes; Thereby it is make that the volume of compound ion source apparatus of the utility model is little, and simple in structure.Most importantly; Use the compound ion source apparatus of the utility model; The type selecting of molecule is used electron bombard pattern or photon bombardment per sample, and perhaps the two uses simultaneously, for example; The nitric oxide in the atmospheric advection layer and the on-line measurement of content of nitrogen dioxide can be used the photon bombardment pattern.The electron bombard pattern then relatively is suitable for volatile molecular weight less than 600 sample, such as chemical pollution thing hexachloro-benzene.When electron bombard and photon bombardment use simultaneously, then be particularly suitable for measuring combustion adjuvant composition PCB etc. in the construction material.What need to specify is, uses the compound ion source of the utility model, and the ionization process of sample molecule occurs in the chamber 2, can the follow-up quality analysis process that occurs in mass analyzer not impacted.Therefore, the compound ion source apparatus of the utility model has strengthened the applicability to dissimilar samples greatly, has effectively improved testing precision simultaneously, and has tested simple and easy to do.
The utility model mass spectrometer comprises quadrupole rod mass analyzer and compound ion source apparatus, and compound ion source apparatus wherein is the described compound ion source apparatus of the utility model.In the mass spectrometer of the utility model; The ionization of sample molecule occurs in the compound ion source apparatus; And the quality analysis process occurs in the mass analyzer; That is to say that the ionization process of sample molecule and quality analysis process are independent of each other in the utility model, this has increased substantially the practicality of the utility model.
Though described the utility model with reference to several exemplary embodiments, should be appreciated that used term is explanation and exemplary and nonrestrictive term.Because the utility model practical implementation and do not break away from the spirit or the essence of utility model in a variety of forms; So be to be understood that; The foregoing description is not limited to any aforesaid details; And should in enclose spirit that claim limited and scope, explain widely, therefore fall into whole variations and remodeling in claim or its equivalent scope and all should be the claim of enclosing and contain.
Claims (10)
1. compound ion source apparatus; Comprise: housing (1) and be installed in chamber (2), the ion lens in the said housing (1) and be installed in outer at least one filament (3) that is used to produce electronics of said chamber (2); The sample export (25) that sample feeding pipe (4) is installed on the wherein said chamber (2) and aligns with said sample feeding pipe (4); Said chamber (2) enters the mouth with the corresponding electronics of said filament (3) respectively, and said ion lens comprises repulsion electrode (21) also parallel to each other on the center line that is installed in this ion lens successively, introduces electrode (22), collector electrode (23) and extraction electrode (24); It is characterized in that; Said repulsion electrode (21) is installed in the said chamber (2); Said introducing electrode (22), collector electrode (23) and extraction electrode (24) are installed in outside the said chamber (2); Said compound ion source apparatus comprises that also at least one is used to produce the ultraviolet source of ultraviolet light (5); Have at least one on the said chamber (2) and be positioned at said repulsion electrode (21) and introduce the loophole (26) between the electrode (22), each said loophole (26) is corresponding with corresponding said ultraviolet source (5) irradiation position, and a condenser lens (6) is installed in also contiguous said loophole (26) position on the illumination path of each said ultraviolet source (5).
2. compound ion source apparatus as claimed in claim 1 is characterized in that, the quantity of said filament (3) is two, is distributed in the two opposite sides of said chamber (2), and the line at said two filaments (3) center is vertical with the center line of said ion lens.
3. compound ion source apparatus as claimed in claim 1; It is characterized in that; The quantity of said ultraviolet source (5) is two, is distributed in the two opposite sides of said chamber (2), and the line at said two ultraviolet sources (5) center is vertical with the center line of said ion lens.
4. compound ion source apparatus as claimed in claim 2; It is characterized in that; The quantity of said ultraviolet source (5) is two; Be distributed in the two opposite sides of said chamber (2), the line at said two ultraviolet sources (5) center is vertical with said sample feeding pipe (4), and the line at the center of the line at the center of said two ultraviolet sources (5) and said two filaments (3) is orthogonal.
5. compound ion source apparatus as claimed in claim 1 is characterized in that, said condenser lens (6) is installed in the said loophole (26).
6. compound ion source apparatus as claimed in claim 1 is characterized in that, the inner surface of said chamber (2) is the curve form of rounding off.
7. compound ion source apparatus as claimed in claim 6 is characterized in that, the inner surface of said chamber (2) is spherical in shape.
8. compound ion source apparatus as claimed in claim 1 is characterized in that, the focus of said condenser lens (6) is positioned on the center line of said ion lens.
9. compound ion source apparatus as claimed in claim 1 is characterized in that, the inwall of said chamber (2) is provided with reflecting coating, and said repulsion electrode (21) outer surface is provided with reflecting coating.
10. a mass spectrometer comprises quadrupole rod mass analyzer and compound ion source apparatus, it is characterized in that, said compound ion source apparatus is each the described compound ion source apparatus like claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220079088.7U CN202454525U (en) | 2012-03-05 | 2012-03-05 | Compound ion source device and mass spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220079088.7U CN202454525U (en) | 2012-03-05 | 2012-03-05 | Compound ion source device and mass spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202454525U true CN202454525U (en) | 2012-09-26 |
Family
ID=46870366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220079088.7U Expired - Lifetime CN202454525U (en) | 2012-03-05 | 2012-03-05 | Compound ion source device and mass spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202454525U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716007A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Combined ionization source based on vacuum ultraviolet lamp and discharge ionization |
| CN104769700A (en) * | 2012-11-16 | 2015-07-08 | 塞莫费雪科学（不来梅）有限公司 | Ion source assembly for static mass spectrometer |
-
2012
- 2012-03-05 CN CN201220079088.7U patent/CN202454525U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769700A (en) * | 2012-11-16 | 2015-07-08 | 塞莫费雪科学（不来梅）有限公司 | Ion source assembly for static mass spectrometer |
| US9472389B2 (en) | 2012-11-16 | 2016-10-18 | Thermo Fisher Scientific (Bremen) Gmbh | Ion source assembly for static mass spectrometer |
| CN104716007A (en) * | 2013-12-13 | 2015-06-17 | 中国科学院大连化学物理研究所 | Combined ionization source based on vacuum ultraviolet lamp and discharge ionization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103295872A (en) | Compound ion source device and mass spectrometer | |
| CN102299038B (en) | Compound ion source | |
| CN102479662B (en) | Vacuum ultraviolet light ionization source used for high-flux gas sample analysis | |
| CN202172061U (en) | Compound ion source | |
| US11164734B2 (en) | Laser desorption, ablation, and ionization system for mass spectrometry analysis of samples including organic and inorganic materials | |
| CN102854240A (en) | Ion trap mass spectrometer for organic aerosol ionized by vacuum ultraviolet light | |
| CN105632877A (en) | Double-ion-source quadrupole mass spectrometer based on single-photon ionization and electron bombardment ionization | |
| CN109841491A (en) | A kind of photo-ionisation and chemi-ionization source of combined ions | |
| Wenzel et al. | Improvements in ion signal reproducibility obtained using a homogeneous laser beam for on‐line laser desorption/ionization of single particles | |
| CN105632870A (en) | Atmospheric pressure chemical ionization source for mass spectrum | |
| CN103594326A (en) | Double-ionization ion source | |
| CN104392887A (en) | Femtosecond laser post-ionization mass spectrum apparatus | |
| CN108695135A (en) | Ion source and method for generating element ion from aerosol particle | |
| CN111681942A (en) | Aerosol mass spectrometer for online measurement of chemical components of ultrafine particles | |
| CN112185801B (en) | Novel photoelectric composite ion source | |
| Ninomiya et al. | Secondary ion yields for vacuum‐type electrospray droplet beams measured with a triple focus time‐of‐flight analyzer | |
| CN202948899U (en) | Electrostatic lens device based on vacuum ultra violet (VUV) lamp ionization source | |
| CN202454525U (en) | Compound ion source device and mass spectrometer | |
| Ren et al. | Simulated and developed an electron impact ionization source for space miniature time-of-flight mass spectrometer | |
| CN102479660A (en) | Ultraviolet lamp ionizing device | |
| CN213364647U (en) | Time-of-flight mass spectrometry equipment for high-resolution and high-sensitivity determination of VOCs content | |
| CN105655226B (en) | A kind of vacuum ultraviolet ionized and chemi-ionization composite ionization source | |
| Huang et al. | Development of a portable single photon ionization‐photoelectron ionization time‐of‐flight mass spectrometer | |
| CN201152867Y (en) | Infrared laser desorption/vacuum ultraviolet single photon ionization mass spectrometry analytical equipment | |
| CN104777258A (en) | Vacuum ultraviolet light longitudinal ionization volatile organic matter W type mass spectrometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |