CN219642777U - Acetone tank for ion source of mass spectrometer - Google Patents
Acetone tank for ion source of mass spectrometer Download PDFInfo
- Publication number
- CN219642777U CN219642777U CN202320396026.7U CN202320396026U CN219642777U CN 219642777 U CN219642777 U CN 219642777U CN 202320396026 U CN202320396026 U CN 202320396026U CN 219642777 U CN219642777 U CN 219642777U
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- China
- Prior art keywords
- ion source
- tank
- acetone
- mass spectrometer
- flow
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000007789 sealing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000012736 aqueous medium Substances 0.000 claims description 3
- 239000005457 ice water Substances 0.000 claims description 3
- 239000002609 medium Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 239000011521 glass Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 description 30
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- 239000003153 chemical reaction reagent Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 150000001412 amines Chemical class 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000443 aerosol Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000262 chemical ionisation mass spectrometry Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000004172 nitrogen cycle Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The utility model discloses an acetone tank for an ion source of a mass spectrometer, which comprises a tank body and a cover body in sealing connection with the tank body; the cover body is provided with an eduction tube which extends into the tank body, the eduction tube is sequentially connected into a first straight-through, a needle valve and a discharge ion source assembly from bottom to top, and the outlet end of the discharge ion source assembly is communicated with the mass spectrometer; the first straight-through is internally provided with a first flow limiting plate, and the outlet end of the needle valve is provided with a second flow limiting plate. The acetone tank does not need to be provided with a mass flow controller, and the manufacturing cost is low; the device is convenient to use, and can be conveniently carried for use in external field monitoring; potential risks such as fragility of the high-pressure gas cylinder and the glass tank can be effectively avoided; the acetone gas with stable flow can be effectively generated for monitoring the mass spectrometer.
Description
Technical Field
The utility model relates to a gaseous ammonia and organic amine monitoring device, in particular to an acetone tank for a mass spectrometer ion source.
Background
Gaseous ammonia is an important alkaline gas in the atmosphere, is a main neutralizer of atmospheric acid, can rapidly interact with acid-phase substances in the atmosphere, and influences the formation rate of aerosol, thereby indirectly influencing regional air quality and atmospheric visibility; in addition, gaseous ammonia plays an important role in the global nitrogen cycle. Research shows that the gaseous ammonia can react with the gaseous sulfuric acid to promote the generation process of new particles, so that the newly generated particles grow to form larger particles, and finally, weather pollution and other phenomena are caused, and the accurate quantitative detection of the gaseous ammonia has important significance.
Organic amines are also more basic than ammonia as trace compounds in the atmosphere. Industry has also begun to use as greenhouse gas CO 2 There has also been a great deal of research in recent years indicating that organic amines can also react with gaseous sulfuric acid to promote the new particle growth process. Meanwhile, research shows that organic amine has important contribution to forming secondary organic aerosol and promoting the formation of polluted weather, and when the concentration reaches a certain degree, the organic amine has certain harm to human body, including inducing a series of diseases such as asthma and the like, and serious and even cancer can be caused. It is also particularly important for the detection of gaseous organic amines.
For monitoring gaseous ammonia and organic amine, the most effective on-line monitoring method in the world is chemical ionization mass spectrometry at present, and the main working principle of the chemical ionization mass spectrometry is that a large number of reaction ions are generated to react with a substance to be detected and then enter a detector for detection. While the first step of generating a large amount of reactive ions requires a gas apparatus for generating reactive ions to control a constant flow rate. The method is widely used at present, a high-pressure gas bottle/zero gas generating device is connected with a mass flow controller to control the gas flow, the gas is introduced into a glass tank filled with acetone or other reagents, and the introduced gas is used for carrying reagent molecules by using a bubbling method to finally enter an ion source to generate required reaction ions. However, this method has the following problems in actual monitoring: 1) The mass flow controller has higher cost, resulting in increased mass spectrometer cost; 2) The use of a high-pressure gas cylinder has potential safety hazards during actual monitoring, and the gas cylinder is very inconvenient to replace; 3) The ease of breakage of glass cans containing acetone or other reagents causes a series of other problems.
Disclosure of Invention
The utility model aims to: the utility model aims to provide an acetone tank for a mass spectrometer ion source, which is low in cost, convenient to use, small in potential safety hazard and convenient to carry.
The technical scheme is as follows: the utility model relates to an acetone tank for an ion source of a mass spectrometer, which comprises a tank body and a cover body in sealing connection with the tank body; the cover body is provided with an eduction tube which extends into the tank body, the eduction tube is sequentially connected into a first straight-through, a needle valve and a discharge ion source assembly from bottom to top, and the outlet end of the discharge ion source assembly is communicated with the mass spectrometer; the first straight-through is internally provided with a first flow limiting plate, and the outlet end of the needle valve is provided with a second flow limiting plate.
Preferably, the first flow limiting plate and the second flow limiting plate are respectively provided with a flow limiting hole with the diameter of 200 μm.
Preferably, the discharging ion source component is connected with a high-voltage power supply circuit, and the high-voltage power supply circuit is connected with a 0.33MΩ resistor.
Preferably, an O-shaped sealing gasket is arranged between the cover body and the upper port of the tank body, and the cover body and the tank body are fixedly connected through a quick connection clamp.
Preferably, a constant-temperature water bath device is arranged at the periphery of the tank body, and an aqueous medium or an ice water medium is stored in the constant-temperature water bath device.
Preferably, the cover body is further provided with an ingress pipe, and the inlet end of the ingress pipe is provided with a second through.
The beneficial effects are that: compared with the prior art, the utility model has the following advantages:
1. the acetone tank does not need to be provided with a mass flow controller, and the manufacturing cost is low;
2. the acetone tank is convenient to use, and can be conveniently carried for use in external field monitoring;
3. the acetone tank can effectively avoid potential risks such as fragility of the high-pressure gas cylinder and the glass tank;
4. the acetone tank can effectively generate acetone gas with stable flow so as to be used for monitoring by a mass spectrometer.
Drawings
FIG. 1 is a schematic diagram of the structure of an acetone tank of the utility model;
FIG. 2 is a mass spectrometer spectrum of the present utility model for gaseous ammonia and organic amine monitoring.
Reference numerals:
1. a discharge ion source assembly; 2. a needle valve; 3. a first flow restricting plate; 4. a first pass-through; 5. a second through; 6. a fast connecting clamp; 7. an O-ring seal; 8. a constant temperature water bath device; 9. a tank body; 10. a cover body; 11. a second flow restricting plate; 12. a delivery tube; 13. an ingress pipe; 14. a high voltage power supply circuit; 15. acetone reagent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1-2 of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.
As shown in fig. 1-2, the acetone tank for the ion source of the mass spectrometer comprises a tank body 9 and a cover body 10 in sealing connection with the tank body, wherein an O-shaped sealing gasket 7 is arranged between the cover body 10 and an upper port of the tank body 9, and the cover body 10 is fixedly connected with the tank body 9 through a quick connection clamp 6; specifically, the opening at the upper end of the tank body 9 is fixedly sealed through the quick connection clamp of the KF40 model, the O-shaped sealing gasket 7 can adopt the anti-acetone corrosion sealing gasket of the KF40 model, acetone addition can be completed by opening the quick connection clamp 6 when the acetone reagent 15 is required to be added, the problem that the adding reagent steps are complicated in the traditional method is solved, and the risks that a glass tank is fragile and the like are avoided.
As shown in fig. 1, a delivery tube 12 extending into the tank body is arranged on the cover body 10, the lower end of the delivery tube 12 is arranged above the liquid level of the acetone reagent, the delivery tube 12 is made of a metal conduit made of stainless steel material, and the acetone reagent vapor can enter the discharge ion source assembly 1 through the delivery tube. The delivery pipe 12 is sequentially connected into the first straight through 4, the needle valve 2 and the discharge ion source component 1 from bottom to top, and the outlet end of the discharge ion source component 1 is communicated with the mass spectrometer. The discharge ion source component 1 is connected with a high-voltage power supply circuit 14, the high-voltage power supply circuit 14 is connected with a 0.33MΩ resistor, and the high-voltage power supply circuit 14 generates high-voltage discharge ionized acetone to generate reactive ions C required for monitoring 3 H 6 OH + Ions. The first through 4 is internally provided with a first flow limiting plate 3, the outlet end of the needle valve 2 is provided with a second flow limiting plate 11, and the first flow limiting plate 3 and the second flow limiting plate 11 are respectively provided with a flow limiting hole with the diameter of 200 mu m; the first through 4 is a Swagelok through, and the first restrictor plate 3 can restrict the flow through the Swagelok through; the needle valve 2 can adopt a Swagelok low-flow needle valve, and the Swagelok low-flow needle valve can adjust the required acetone steam flow; the second restrictor plate 11 controls the flow of acetone vapor into the discharge ion source assembly 1.
In an alternative embodiment, the periphery of the tank body 9 is provided with a constant-temperature water bath device 8, an aqueous medium or an ice water medium is stored in the constant-temperature water bath device 8, and the temperature of the reagent in the tank body can be controlled to be constant 0 ℃ through the constant-temperature water bath device 8, so that the saturated vapor pressure of the acetone reagent is kept unchanged, and the rate of the acetone vapor volatilized in the acetone tank is kept stable and unchanged.
In an alternative embodiment, the cover 10 is further provided with an inlet pipe 13, and the inlet pipe 13, the outlet pipe 12 and the tank 9 are made of the same material, and are all made of stainless steel materials. The lower end of the ingress pipe 13 stretches into the tank body below the acetone reagent liquid level, the ingress pipe 13 is provided with a second straight-through 5, the second straight-through 5 can be a Swagelok straight-through, the inlet end of the second straight-through 5 can be in a closed state in a normal state, and the second straight-through 5 can be opened according to the requirement to control a large-flow air flow to bring acetone steam into the discharge ion source assembly 1 through a bubbling method.
The working principle or the working method of the acetone tank comprises the following steps:
during operation, the acetone reagent 15 is added into the tank body 9, the temperature of the reagent in the tank body is controlled to be constant at 0 ℃ through the constant-temperature water bath device 8, and the saturated vapor pressure of the acetone reagent in the acetone tank is kept unchanged, so that the vapor rate of the volatilized acetone is controlled to be stable. Since the rear end of the discharge ion source assembly 1 is connected with the ion drift tube reaction chamber to form a low-pressure environment, the acetone vapor naturally flows along the delivery tube 12 from the high-pressure end of the tank 9 to the low-pressure end of the discharge ion source assembly. The flow of the acetone steam is controlled through a first flow limiting plate 3 arranged in a first straight through 4, then the required acetone steam flow is regulated through a needle valve 2, a second flow limiting plate 11 is arranged at the outlet of the needle valve 2 and can control the amount of the acetone steam finally entering a discharge ion source assembly 1, and the discharge ion source assembly 1 ionizes the acetone steam through high-voltage discharge to generate reaction ions C required for monitoring 3 H 6 OH + Ions. The tank body 9 can be fixedly sealed by a set of quick-connection clamp 6 and a matched O-shaped sealing washer 7. The tank 9 is also provided with an ingress pipe 13 and a second straight-through 5 at the top end of the ingress pipe 13, and the second straight-through 5 is opened according to the requirement to control the high-flow air flow so as to bring the acetone vapor in the acetone tank into the discharge ion source assembly 1 through a bubbling method. The mass spectrometer spectra of the gaseous ammonia and organic amine mass spectrometer monitoring were carried out using the acetone tank of the present utility model (as shown in fig. 2).
The foregoing is a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present utility model.
Claims (6)
1. An acetone tank for a mass spectrometer ion source, characterized in that the acetone tank comprises a tank body (9) and a cover body (10) which is in sealing connection with the tank body; the cover body (10) is provided with a delivery pipe (12) extending into the tank body, the delivery pipe (12) is sequentially connected into the first straight-through pipe (4), the needle valve (2) and the discharge ion source assembly (1) from bottom to top, and the outlet end of the discharge ion source assembly (1) is communicated with the mass spectrometer; the first through (4) is internally provided with a first flow limiting plate (3), and the outlet end of the needle valve (2) is provided with a second flow limiting plate (11).
2. The acetone tank for a mass spectrometer ion source according to claim 1, wherein the first flow-limiting plate (3) and the second flow-limiting plate (11) are respectively provided with a 200 μm diameter flow-limiting hole.
3. The acetone tank for a mass spectrometer ion source according to claim 1, wherein the discharge ion source assembly (1) is connected with a high-voltage power supply circuit (14), and the high-voltage power supply circuit (14) is connected with a 0.33mΩ resistor.
4. The acetone tank for the ion source of the mass spectrometer according to claim 1, wherein an O-shaped sealing gasket (7) is arranged between the cover body (10) and the upper port of the tank body (9), and the cover body (10) is fixedly connected with the tank body (9) through a quick connection clamp (6).
5. The acetone tank for the ion source of the mass spectrometer according to claim 1, wherein a constant-temperature water bath device (8) is arranged on the periphery of the tank body (9), and an aqueous medium or an ice water medium is stored in the constant-temperature water bath device (8).
6. The acetone tank for the ion source of the mass spectrometer according to claim 1, wherein the cover body (10) is further provided with an ingress pipe (13), and the ingress end of the ingress pipe (13) is provided with a second through (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320396026.7U CN219642777U (en) | 2023-03-06 | 2023-03-06 | Acetone tank for ion source of mass spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320396026.7U CN219642777U (en) | 2023-03-06 | 2023-03-06 | Acetone tank for ion source of mass spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219642777U true CN219642777U (en) | 2023-09-05 |
Family
ID=87819009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320396026.7U Active CN219642777U (en) | 2023-03-06 | 2023-03-06 | Acetone tank for ion source of mass spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219642777U (en) |
-
2023
- 2023-03-06 CN CN202320396026.7U patent/CN219642777U/en active Active
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