CN113451104A - Sample introduction ionization source, forming method and working method thereof, and detection device - Google Patents
Sample introduction ionization source, forming method and working method thereof, and detection device Download PDFInfo
- Publication number
- CN113451104A CN113451104A CN202110722753.3A CN202110722753A CN113451104A CN 113451104 A CN113451104 A CN 113451104A CN 202110722753 A CN202110722753 A CN 202110722753A CN 113451104 A CN113451104 A CN 113451104A
- Authority
- CN
- China
- Prior art keywords
- electrode
- sample introduction
- ionization source
- counter electrode
- semi
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 52
- 230000005284 excitation Effects 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims description 49
- 150000002500 ions Chemical class 0.000 claims description 45
- 239000007789 gas Substances 0.000 claims description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000002041 carbon nanotube Substances 0.000 claims description 11
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 9
- 229910021389 graphene Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 150000008282 halocarbons Chemical class 0.000 claims description 4
- 230000005693 optoelectronics Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000001871 ion mobility spectroscopy Methods 0.000 description 1
- 238000000752 ionisation method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- -1 oxygen ion Chemical class 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/10—Ion sources; Ion guns
- H01J49/16—Ion sources; Ion guns using surface ionisation, e.g. field-, thermionic- or photo-emission
- H01J49/161—Ion sources; Ion guns using surface ionisation, e.g. field-, thermionic- or photo-emission using photoionisation, e.g. by laser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/622—Ion mobility spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/0027—Methods for using particle spectrometers
- H01J49/0031—Step by step routines describing the use of the apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0422—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components for gaseous samples
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Toxicology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention provides a sample introduction ionization source, a forming method, a working method and a detection device thereof, wherein the sample introduction ionization source comprises the following components: the supporting net electrode and the counter electrode are oppositely arranged and spaced; one end of the power supply is connected with the supporting net electrode, and the other end of the power supply is connected with the counter electrode; advance kind rete, advance kind rete includes: the semi-permeable membrane layer is positioned on the surface of one side, back to the counter electrode, of the support mesh electrode; and the excitation light source is suitable for emitting excitation light to one side surface of the sample injection film layer facing the counter electrode. The ionization efficiency of the sample introduction ionization source is improved.
Description
Technical Field
The invention relates to the technical field of ionization, in particular to a sample injection ionization source, a forming method and a working method thereof, and a detection device.
Background
The existing detection device, such as ion mobility spectrometry, is used for realizing sample introduction of sample molecules by the semipermeable membrane, and the semipermeable membrane can realize transmission of volatile organic molecules while isolating the ambient air. Sample molecules are fed into an ion source for ionization after being injected through a semipermeable membrane.
However, since the sampling and ionization processes are separated, sample molecules are transported from one side of the semipermeable membrane to the other side by diffusion and then diffused into the ion source from the other side of the semipermeable membrane, a gradient distribution of concentration exists in the whole diffusion process, the concentration of the sample molecules is reduced when the concentration of the sample molecules reaches the ionization region due to diffusion, and the ionization efficiency of the actual sample molecules is low.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problem of low ionization efficiency of the sample ionization source in the prior art, so as to provide the sample ionization source, the forming method and the working method thereof, and the detection device.
The invention provides a sample introduction ionization source, comprising: the supporting net electrode and the counter electrode are oppositely arranged and spaced; one end of the power supply is connected with the supporting net electrode, and the other end of the power supply is connected with the counter electrode; a sample injection film layer; the sample introduction film layer comprises: the semi-permeable membrane layer is positioned on the surface of one side, back to the counter electrode, of the support mesh electrode; and the excitation light source is suitable for emitting excitation light to one side surface of the sample injection film layer facing the counter electrode.
Optionally, the supporting mesh electrode has a plurality of mesh gaps therein; the sample introduction film layer further comprises: discrete photoelectric material bulges are positioned on the surface of the semi-permeable membrane layer and in the mesh; and a channel between the supporting mesh electrode and the counter electrode is suitable for introducing electron-withdrawing gas.
Optionally, the photoelectric material protrusion is a graphene protrusion or a carbon nanotube protrusion.
Optionally, the electron-withdrawing gas comprises any one or more of a halogenated hydrocarbon gas or oxygen.
Optionally, the thickness of the photoelectric material protrusion is 1nm-5000 nm.
Optionally, the excitation light source is an ultraviolet lamp light source, and the excitation light is ultraviolet light.
The invention also provides a working method of the sample injection ionization source, which comprises the following steps: the sample introduction ionization source forms product positive ions in a positive ion mode; the process of forming product positive ions by the sample introduction ionization source comprises the following steps: and after passing through the semi-permeable membrane layer, sample injection molecules form product positive ions under the irradiation of laser emitted by the excitation light source.
Optionally, the supporting mesh electrode has a plurality of mesh gaps therein; the sample introduction film layer further comprises: discrete photoelectric material bulges are positioned on the surface of the semi-permeable membrane layer and in the mesh; the channel between the supporting net electrode and the counter electrode is suitable for introducing electron-withdrawing gas; the sample introduction ionization source forms product negative ions in a negative ion mode; the process of forming product negative ions by the sample introduction ionization source comprises the following steps: the excitation light source emits excitation light to the photoelectric material bulge, so that the photoelectric material bulge generates photo-generated electrons; the photo-generated electrons and water molecules positioned on the surface of the support net electrode and the electron-absorbing gas form hydrated intermediate ions; the hydrated intermediate ions and sample injection molecules passing through the semi-permeable membrane layer form product negative ions.
The invention also provides a method for forming the sample injection ionization source, which comprises the following steps: providing a supporting mesh electrode, a counter electrode and a power supply; the surface of the supporting net electrode is provided with a sample introduction film layer, and the step of forming the sample introduction film layer comprises the following steps: forming a semi-permeable membrane layer on the surface of one side of the support net electrode; the supporting mesh electrode and the counter electrode are oppositely arranged and spaced, and the semi-permeable membrane layer is positioned on one side of the supporting mesh electrode, which is back to the counter electrode; connecting one end of the power supply with the supporting net electrode, and connecting the other end of the power supply with the counter electrode; and arranging an excitation light source, wherein the excitation light source is suitable for emitting excitation light to the surface of one side of the sample introduction film layer, which faces the counter electrode.
Optionally, the supporting mesh electrode is provided with a plurality of mesh gaps therein; the step of forming the sample introduction film layer further comprises: forming discrete photoelectric material bulges positioned in the mesh gap on one side surface of the semi-permeable membrane layer; the forming method of the sample introduction ionization source further comprises the following steps: and arranging an electron-withdrawing gas source which is suitable for leading electron-withdrawing gas to a channel between the supporting mesh electrode and the counter electrode.
Optionally, the step of forming the optoelectronic material bump includes: providing a mixed dispersion comprising: volatile liquids and particles of photovoltaic material; coating the mixed dispersion liquid on the surface of one side, facing the net gap, of the semi-permeable membrane layer to form a photoelectric material coating; and drying the photoelectric material coating to remove the volatile liquid, so that the photoelectric material coating forms discrete photoelectric material protrusions.
The present invention also provides a detection apparatus comprising: the invention relates to a sample introduction ionization source.
The technical scheme of the invention has the following beneficial effects:
in the sample introduction ionization source provided by the technical scheme of the invention, the exciting light emitted by the exciting light source is used for directly or indirectly exciting sample introduction molecules to generate product ions, so that the sample introduction molecules are ionized on the surface of the semi-permeable film layer after passing through the semi-permeable film layer, more sample introduction molecules are ionized, and the ionization efficiency of the sample introduction molecules is effectively improved.
Further, the sample introduction film layer further comprises: discrete photoelectric material bulges are positioned on the surface of the semi-permeable membrane layer and in the mesh; and a channel between the supporting mesh electrode and the counter electrode is suitable for introducing electron-withdrawing gas. The excitation light source emits excitation light to the photoelectric material bulge, so that the photoelectric material bulge generates photo-generated electrons; the photo-generated electrons and water molecules positioned on the surface of the support net electrode and the electron-absorbing gas form hydrated intermediate ions; the hydrated intermediate ions and sample injection molecules passing through the semi-permeable membrane layer form product negative ions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a sample introduction ionization source according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an ion mobility spectrometer according to another embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
An embodiment of the present invention provides a sample introduction ionization source, please refer to fig. 1, which includes:
a support mesh electrode 100 and a counter electrode 110 which are oppositely arranged and spaced;
a power supply 140, wherein one end of the power supply 140 is connected with the supporting grid electrode 100, and the other end of the power supply 140 is connected with the counter electrode 110;
advance kind rete, advance kind rete includes: the semi-permeable membrane layer 121 is positioned on the surface of one side, facing away from the counter electrode 110, of the supporting mesh electrode 100;
an excitation light source 130, wherein the excitation light source 130 is adapted to emit excitation light to a side surface of the sample membrane layer facing the counter electrode 110.
The semi-permeable membrane layer 121 enables sample molecules to pass through, and the semi-permeable membrane layer 121 can isolate ambient air and simultaneously can realize transmission of the sample molecules. The sample injection molecules comprise volatile organic molecules.
The excitation light source 130 is an ultraviolet lamp light source, and the excitation light is ultraviolet light.
The excitation light emitted by the excitation light source 130 is used for directly or indirectly exciting the sample molecules to generate product ions, so that the sample molecules are ionized on the surface of the semi-permeable membrane layer 121 after passing through the semi-permeable membrane layer 121, and thus, more sample molecules are ionized, and the ionization efficiency of the sample molecules is effectively improved.
The supporting mesh electrode 100 has a plurality of mesh gaps therein.
In this embodiment, the sample introduction film layer further includes: discrete protrusions 122 of photovoltaic material on the surface of the semi-permeable membrane layer 121 and in the mesh; the passage between the support screen electrode 100 and the counter electrode 110 is adapted to be fed with an electron-withdrawing gas.
The photoelectric material protrusion 122 is a graphene protrusion or a carbon nanotube protrusion.
When the protrusions 122 are carbon nanotube protrusions, in one embodiment, the extending direction of the carbon nanotubes is perpendicular to the surface of the semi-permeable film layer 121. In other embodiments, the extending direction of the carbon nanotubes may be randomly arranged, as long as it is ensured that the carbon nanotube protrusions are discretely distributed.
When the optoelectronic material protrusion 122 is a graphene protrusion, in an embodiment, the graphene is microscopically arranged to be discretely paved on the surface of the semi-permeable film layer 121.
The electron-withdrawing gas comprises any one or more of halogenated hydrocarbon gas or oxygen.
The halogenated hydrocarbon gas includes a fluorinated hydrocarbon gas, a chlorinated hydrocarbon gas, a brominated hydrocarbon gas, or an iodohydrocarbon gas.
In one embodiment, the thickness of the protrusions 122 is 1nm to 5000nm, such as 10 to 50 nm. The thickness of the protrusions 122 of the electro-optic material refers to the dimension in the direction perpendicular to the surface of the semi-permeable membrane layer 121. The thickness of the photovoltaic material protrusion 122 should not be too large to ensure good dispersion characteristics of the photovoltaic material protrusion 122. The reason why the opto-electronic material protrusions 122 need to be provided as discrete is: it is necessary to make the sample molecules passing through the sample membrane layer continue to pass through the gaps between the discrete protrusions 122 of the photoelectric material, so as to transmit the sample molecules well.
In this embodiment, the sample introduction ionization source further includes: the heating unit (not shown) is positioned on the surface of the side, opposite to the counter electrode 110, of the sample injection film layer, and the heating unit is suitable for heating the semi-permeable film layer 121, so that sample molecules can be diffused to the photoelectric material protrusions 122 more quickly, photoelectrons can be generated by the photoelectric material protrusions 122 more conveniently, and the ionization efficiency is improved.
In one embodiment, the heating unit is structured as a metal block comprising a sample introduction channel and a heating rod.
Another embodiment of the present invention further provides a working method of the sample injection ionization source, including:
the sample introduction ionization source forms product positive ions in a positive ion mode;
the process of forming product positive ions by the sample introduction ionization source comprises the following steps: and after passing through the semi-permeable membrane layer, sample injection molecules form product positive ions under the irradiation of laser emitted by the excitation light source.
The exciting light emitted by the exciting light source directly excites the sample injection molecules passing through the semi-permeable membrane layer to form product positive ions. Specifically, M + hv → M+Wherein M is a sample injection molecule, M+For the product positive ion, hv is the energy of the excitation light.
The sample introduction film layer further comprises: the supporting mesh electrode is provided with a plurality of meshes; the sample introduction film layer further comprises: discrete photoelectric material bulges are positioned on the surface of the semi-permeable membrane layer and in the mesh; the channel between the supporting net electrode and the counter electrode is suitable for introducing electron-withdrawing gas
The sample introduction ionization source forms product negative ions in a negative ion mode; the process of forming product negative ions by the sample introduction ionization source comprises the following steps: the excitation light source emits excitation light to the photoelectric material bulge, so that the photoelectric material bulge generates photo-generated electrons; the photo-generated electrons and water molecules positioned on the surface of the support net electrode and the electron-absorbing gas form hydrated intermediate ions; the hydrated intermediate ions and sample injection molecules passing through the semi-permeable membrane layer form product negative ions.
In one embodiment, the electron-withdrawing gas is oxygen and the hydrated intermediate ion is hydrated oxygen ion O2 -(H2O), M is a sample injection molecule, and the negative ion of the product is MO2 -(H2O)n-1The specific forming process is as follows:
specifically, CNTs or Graphene + hv → e-；
e-+O2+nH2O→O2 -(H2O)n；
O2 -(H2O)n+M→MO2 -(H2O)n-1+H2O。
Wherein CNTs represents carbon nanotube protrusions, Graphene represents Graphene protrusions, hv is energy of excitation light, e-Representing photo-generated electrons, and M is a sample injection molecule.
Another embodiment of the present invention further provides a method for forming a sample injection ionization source, including: providing a supporting mesh electrode, a counter electrode and a power supply; the surface of the supporting net electrode is provided with a sample introduction film layer, and the step of forming the sample introduction film layer comprises the following steps: forming a semi-permeable membrane layer on the surface of one side of the support net electrode; the supporting mesh electrode and the counter electrode are oppositely arranged and spaced, and the semi-permeable membrane layer is positioned on one side of the supporting mesh electrode, which is back to the counter electrode; connecting one end of the power supply with the supporting net electrode, and connecting the other end of the power supply with the counter electrode; and arranging an excitation light source, wherein the excitation light source is suitable for emitting excitation light to the surface of one side of the sample introduction film layer, which faces the counter electrode.
The supporting mesh electrode is provided with a plurality of meshes; the step of forming the sample introduction film layer further comprises: forming discrete photoelectric material bulges positioned in the mesh gap on one side surface of the semi-permeable membrane layer; the forming method of the sample introduction ionization source further comprises the following steps: and arranging an electron-withdrawing gas source which is suitable for leading electron-withdrawing gas to a channel between the supporting mesh electrode and the counter electrode.
The step of forming the photovoltaic material bump comprises: providing a mixed dispersion comprising: volatile liquids and particles of photovoltaic material; coating the mixed dispersion liquid on the surface of one side, facing the net gap, of the semi-permeable membrane layer to form a photoelectric material coating; and drying the photoelectric material coating to remove the volatile liquid, so that the photoelectric material coating forms discrete photoelectric material protrusions.
In a specific embodiment, the semi-permeable membrane layer and the supporting net electrode are placed in a spin coater, the supporting net electrode faces upwards, 0.21 wt% of graphene dispersion liquid is dripped on the semi-permeable membrane layer, the semi-permeable membrane layer and the supporting net electrode are firstly kept at 550 rpm for 12s and then at 3000 rpm for 40s, and then the semi-permeable membrane layer and the supporting net electrode are placed on a heating table and kept at 150 ℃ for 10min to dry volatile liquid on the surface of the semi-permeable membrane layer.
In another embodiment, the semi-permeable membrane layer and the supporting net electrode are placed in a spin coater, the supporting net electrode faces upwards, 1 wt% of carbon nanotube dispersion liquid is dripped on the semi-permeable membrane layer, the semi-permeable membrane layer and the supporting net electrode are firstly kept at 550 rpm for 12s and then kept at 3000 rpm for 40s, and then the semi-permeable membrane layer and the supporting net electrode are placed on a heating table and kept at 150 ℃ for 10min to dry volatile liquid on the surface.
In the process of forming the photoelectric material bulge, the semi-permeable film layer is propped open by the supporting net electrode, so that the semi-permeable film layer is prevented from shrinking in the process of the process, and the dispersibility of the photoelectric material bulge is facilitated.
Another embodiment of the present invention further provides a detection apparatus, including: the invention relates to a sample introduction ionization source.
Referring to fig. 2, the detection device is an ion mobility spectrometer. The ion mobility spectrometer further comprises: a migration unit located on the side of the counter electrode 110 facing away from the support screen electrode 100.
The migration unit includes: a plurality of spaced conducting rings 200, each of said conducting rings having a different applied voltage; a detector 210, the detector 210 for detecting product ions. The region of the migration unit is also adapted to be filled with a drift gas.
In other embodiments, the detection device is a mass spectrometer.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (12)
1. A sample introduction ionization source, comprising:
the supporting net electrode and the counter electrode are oppositely arranged and spaced;
one end of the power supply is connected with the supporting net electrode, and the other end of the power supply is connected with the counter electrode;
advance kind rete, advance kind rete includes: the semi-permeable membrane layer is positioned on the surface of one side, back to the counter electrode, of the support mesh electrode;
and the excitation light source is suitable for emitting excitation light to one side surface of the sample injection film layer facing the counter electrode.
2. The feed ionization source of claim 1, wherein the support screen electrode has a plurality of screen gaps therein;
the sample introduction film layer further comprises: discrete photoelectric material bulges are positioned on the surface of the semi-permeable membrane layer and in the mesh;
and a channel between the supporting mesh electrode and the counter electrode is suitable for introducing electron-withdrawing gas.
3. The sample introduction ionization source of claim 2, wherein the photoelectric material protrusions are graphene protrusions or carbon nanotube protrusions.
4. The feed ionization source of claim 2, wherein the electron-withdrawing gas comprises any one or a combination of more of a halogenated hydrocarbon gas or oxygen.
5. The feed ionization source of claim 2, wherein the thickness of the photoelectric material protrusion is 1nm to 5000 nm.
6. The sample ionization source of claim 1, wherein the excitation light source is an ultraviolet light source and the excitation light is ultraviolet light.
7. A method of operating a feed ionization source as claimed in any one of claims 1 to 6, comprising:
the sample introduction ionization source forms product positive ions in a positive ion mode;
the process of forming product positive ions by the sample introduction ionization source comprises the following steps: and after passing through the semi-permeable membrane layer, sample injection molecules form product positive ions under the irradiation of laser emitted by the excitation light source.
8. The working method of the sampling ionization source as recited in claim 7, wherein the supporting mesh electrode has a plurality of mesh gaps therein; the sample introduction film layer further comprises: discrete photoelectric material bulges are positioned on the surface of the semi-permeable membrane layer and in the mesh; the channel between the supporting net electrode and the counter electrode is suitable for introducing electron-withdrawing gas;
the sample introduction ionization source forms product negative ions in a negative ion mode;
the process of forming product negative ions by the sample introduction ionization source comprises the following steps: the excitation light source emits excitation light to the photoelectric material bulge, so that the photoelectric material bulge generates photo-generated electrons; the photo-generated electrons and water molecules positioned on the surface of the support net electrode and the electron-absorbing gas form hydrated intermediate ions; the hydrated intermediate ions and sample injection molecules passing through the semi-permeable membrane layer form product negative ions.
9. A method for forming a sample introduction ionization source is characterized by comprising the following steps:
providing a supporting mesh electrode, a counter electrode and a power supply;
the surface of the supporting net electrode is provided with a sample introduction film layer, and the step of forming the sample introduction film layer comprises the following steps: forming a semi-permeable membrane layer on the surface of one side of the support net electrode;
the supporting mesh electrode and the counter electrode are oppositely arranged and spaced, and the semi-permeable membrane layer is positioned on one side of the supporting mesh electrode, which is back to the counter electrode;
connecting one end of the power supply with the supporting net electrode, and connecting the other end of the power supply with the counter electrode;
and arranging an excitation light source, wherein the excitation light source is suitable for emitting excitation light to the surface of one side of the sample introduction film layer, which faces the counter electrode.
10. The method of claim 9, wherein the support screen electrode has a plurality of screen gaps therein;
the step of forming the sample introduction film layer further comprises: forming discrete photoelectric material bulges positioned in the mesh gap on one side surface of the semi-permeable membrane layer;
the forming method of the sample introduction ionization source further comprises the following steps: and arranging an electron-withdrawing gas source which is suitable for leading electron-withdrawing gas to a channel between the supporting mesh electrode and the counter electrode.
11. The method of claim 10, wherein the step of forming the bump of optoelectronic material comprises: providing a mixed dispersion comprising: volatile liquids and particles of photovoltaic material; coating the mixed dispersion liquid on the surface of one side, facing the net gap, of the semi-permeable membrane layer to form a photoelectric material coating; and drying the photoelectric material coating to remove the volatile liquid, so that the photoelectric material coating forms discrete photoelectric material protrusions.
12. A detection device, comprising: the feed ionization source of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110722753.3A CN113451104B (en) | 2021-06-29 | 2021-06-29 | Sample injection ionization source, forming method and working method thereof, and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110722753.3A CN113451104B (en) | 2021-06-29 | 2021-06-29 | Sample injection ionization source, forming method and working method thereof, and detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113451104A true CN113451104A (en) | 2021-09-28 |
| CN113451104B CN113451104B (en) | 2023-12-15 |
Family
ID=77813612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110722753.3A Active CN113451104B (en) | 2021-06-29 | 2021-06-29 | Sample injection ionization source, forming method and working method thereof, and detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113451104B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629933A (en) * | 2008-07-16 | 2010-01-20 | 同方威视技术股份有限公司 | Ion mobility spectrometer |
| RU2475882C1 (en) * | 2011-06-16 | 2013-02-20 | Федеральное государственное унитарное предприятие "Научно-исследовательский технологический институт имени А.П. Александрова" | Bipolar ionisation source |
| CN103311089A (en) * | 2013-04-12 | 2013-09-18 | 李鹏 | Photoelectric-effect ion source based on carbon nano-tubes |
| US20140160477A1 (en) * | 2012-12-07 | 2014-06-12 | Ldetek Inc. | Micro-plasma emission detector unit and method |
| CN106024573A (en) * | 2016-06-29 | 2016-10-12 | 苏州微木智能系统有限公司 | Photoemission ionization source |
-
2021
- 2021-06-29 CN CN202110722753.3A patent/CN113451104B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629933A (en) * | 2008-07-16 | 2010-01-20 | 同方威视技术股份有限公司 | Ion mobility spectrometer |
| US20110114837A1 (en) * | 2008-07-16 | 2011-05-19 | Nuctech Company Limited | Ion mobility spectrometer |
| RU2475882C1 (en) * | 2011-06-16 | 2013-02-20 | Федеральное государственное унитарное предприятие "Научно-исследовательский технологический институт имени А.П. Александрова" | Bipolar ionisation source |
| US20140160477A1 (en) * | 2012-12-07 | 2014-06-12 | Ldetek Inc. | Micro-plasma emission detector unit and method |
| CN103311089A (en) * | 2013-04-12 | 2013-09-18 | 李鹏 | Photoelectric-effect ion source based on carbon nano-tubes |
| CN106024573A (en) * | 2016-06-29 | 2016-10-12 | 苏州微木智能系统有限公司 | Photoemission ionization source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113451104B (en) | 2023-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Watanabe et al. | Far-ultraviolet plane-emission handheld device based on hexagonal boron nitride | |
| US20080299374A1 (en) | Transparent electrode comprising carbon nanotube and method of preparing the same | |
| Li et al. | Optimizing the field emission properties of ZnO nanowire arrays by precisely tuning the population density and application in large-area gated field emitter arrays | |
| JP5064228B2 (en) | Photocatalytic process | |
| KR960015663A (en) | Improved method and apparatus for producing particulate field emitters, and resulting products | |
| Piao et al. | Optical and electrical properties of inner tubes in outer wall-selectively functionalized double-wall carbon nanotubes | |
| CN103311089B (en) | Photoelectric ion source based on CNT | |
| KR20040090448A (en) | Method of manufacturing electron-emitting source | |
| CN106024573B (en) | A kind of photoemission ionization source | |
| CN113451104A (en) | Sample introduction ionization source, forming method and working method thereof, and detection device | |
| KR20100123143A (en) | Field emission device and field emission display device having the same | |
| Daiko et al. | H+ emission under room temperature and non-vacuum atmosphere from a sol–gel-derived nanoporous emitter | |
| CN219871146U (en) | Mass spectrum imaging system and preprocessing device | |
| US20060217025A1 (en) | Method for enhancing homogeneity of carbon nanotube electron emission source made by electrophoresis deposition | |
| JP4579372B2 (en) | Electron emitting device, method for manufacturing electron emitting device, and image display device | |
| KR20100092011A (en) | Oxygen separation element and method | |
| CN110880446B (en) | Deep ultraviolet LED ionization source and working method thereof | |
| KR20070099734A (en) | Field emission display with selective aarray of electron emission source and manufacturing of method the same | |
| JP5343531B2 (en) | Electron emitting device, manufacturing method thereof, and surface light emitting device | |
| US20060213774A1 (en) | Method for enhancing homogeneity and effeciency of carbon nanotube electron emission source of field emission display | |
| CN213965932U (en) | Plasma and ultraviolet photolysis integrated gas treatment device | |
| JP4578350B2 (en) | Carbon film, electron emission source and field emission type lighting lamp | |
| JP2008053172A (en) | Surface light emitting device | |
| RU2640355C2 (en) | Cathode manufacturing method based on array of field-emission emitters | |
| KR100917466B1 (en) | Field emission surface light source apparatus and method for fabricating the same |
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 |