CN208580061U - A kind of air ventilation device - Google Patents
A kind of air ventilation device Download PDFInfo
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- CN208580061U CN208580061U CN201821279102.1U CN201821279102U CN208580061U CN 208580061 U CN208580061 U CN 208580061U CN 201821279102 U CN201821279102 U CN 201821279102U CN 208580061 U CN208580061 U CN 208580061U
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Abstract
The disclosure belongs to mass-spectrometer measurement technical field, and in particular to the air ventilation device based on nucleopore membranes.The device includes coaxial first pipe and second pipe；The both ends of the first pipe are respectively arranged with argon inlet mouth and argon gas gas outlet；The second pipe is located inside first pipe, and both ends are stretched out outside first pipe and outer diameter is less than the internal diameter of first pipe；It is provided with equally distributed duct on the tube wall of second pipe, is enclosed with nucleopore membranes on the outside of tube wall；One end of second pipe is the injection port of air aerosol, and the other end is the outlet of air aerosol and the sampling system of the outlet of the air aerosol and ICP-MS connect；The injection port of air aerosol is corresponding with the position of argon gas gas outlet, and the outlet of air aerosol is corresponding with the position of argon inlet mouth, to realize the counter current contacting of air aerosol and argon gas, ensure that gas displacement effect.The apparatus structure is simple and convenient to operate and replacement rate reaches 99.9% or more.
Description
Technical field
The disclosure belongs to mass-spectrometer measurement technical field, and in particular to is based on air ventilation device.
Background technique
ICP-MS can be used to measure the content of heavy metal element in air aerosol, and working gas is argon gas.It is measuring
In the process, if nitrogen and oxygen element in air enter ICP-MS can be by plasma ionization, and the ionization of nitrogen, oxygen can drop
The ionising effect of low metal to be measured, so as to cause the sensitivity decrease for measuring metal ion to be measured.In addition, if into ICP-
It is flame-out that the nitrogen of MS, oxygen content increase can directly result in instrument to a certain extent, it is therefore desirable to which strict control enters the sky of ICP-MS
Gas content.Traditional method is realized by control sample introduction flow, using volume control device control into ICP-MS's
Aerosol flow is in 10~20ml/min, to reduce air content.But due to the low inspection that will lead to measuring system of sample introduction flow
Rising limit is higher.It is desirable to which seeking one kind does not reduce sample introduction flow simultaneously and is able to achieve content of beary metal standard in air aerosol
The device really measured.
Utility model content
(1) purpose of utility model
According to the problems of prior art, the utility model provide a kind of structure is simple, do not reduce aerosol into
Sample flow and the air ventilation device for being able to achieve content of beary metal Accurate Determining in aerosol.
(2) technical solution
In order to solve the problems of prior art, the technical scheme that the utility model is provided is as follows:
A kind of air ventilation device, the device include coaxial first pipe and second pipe；The two of the first pipe
End is respectively arranged with argon inlet mouth and argon gas gas outlet；
The second pipe is located inside first pipe, and second pipe length is greater than first pipe, and the first pipe is stretched out at both ends
Outside road and outer diameter is less than the internal diameter of first pipe；Equally distributed duct, packet on the outside of tube wall are provided on the tube wall of second pipe
It is wrapped with nucleopore membranes；One end of second pipe is the injection port of air aerosol, and the other end is the outlet of air aerosol and should
The outlet of air aerosol and the sampling system of ICP-MS connect；The injection port of air aerosol and the position of argon gas gas outlet
Corresponding, the outlet of air aerosol is corresponding with the position of argon inlet mouth, to realize that the adverse current of air aerosol and argon gas connects
Touching, ensure that gas displacement effect.
Preferably, the outer diameter of the first pipe is 30~50mm, and internal diameter is 4~6mm smaller than outer diameter.
Preferably, the outer diameter of the second pipe is 10~14mm, and internal diameter is 2~4mm smaller than outer diameter.
Preferably, the outer diameter of the first pipe is 40mm, internal diameter 36mm.
Preferably, the outer diameter of the second pipe is 12mm, internal diameter 8mm.
Preferably, the aperture of the nucleopore membranes is 106~2.5 × 106A/cm3, aperture is 60~80nm.
Preferably, the first pipe and the material of second pipe are PVC, stainless steel or organic glass.
Preferably, the flow of the air aerosol is 0.8~1.2L/min, and argon flow is air aerosol flow
8~10 times.
Preferably, it is tightly connected between the first pipe and second pipe.
(3) beneficial effect
The working gas of ICP-MS is argon gas, and air ventilation device provided by the present application enables argon gas that air gas is molten
Air displacement in glue comes out, and structure is simple and convenient to operate and replacement rate reaches 99.9% or more, can effectively meet ICP-MS pairs
The requirement of nitrogen, oxygen content and working gas in air aerosol.The specific beneficial effects are as follows:
1) counter current contacting, gas displacement effect are good
Air aerosol is entered in second pipe by the injection port of air aerosol, and argon gas is entered by argon inlet mouth
In first pipe and the injection port of air aerosol is corresponding with argon gas gas outlet position, realizes the inverse of air aerosol and argon gas
Stream contact, so that gas displacement rate reaches 99.9% or more, and the gas for carrying aerosol is that argon gas is also able to satisfy ICP-MS pairs
The requirement of working gas.
2) duct is set on the second pipe tube wall of the application, the duct is convenient for gas circulation；The aperture wrapped up on tube wall
Nucleopore membranes for 60~80nm also ensure gas displacement and heavy metal ion is not replaced.
3) aerosol injection port is consistent with the flow of outlet, can reach 0.8~1.2L/min, can effectively meet mass spectrum
Instrument measures the demand to flow, in favor of improving the sensitivity of metallic element to be measured.
4) the air inlet direction of argon gas and the outlet direction of air aerosol are consistent, in addition to ensuring that gas displacement effect
Outside, it is thus also avoided that argon flow is disturbed caused by air aerosol flow.
Detailed description of the invention
Fig. 1 is first pipe schematic diagram provided by the present application；
Fig. 2 is second pipe schematic diagram provided by the present application；
Wherein 1 is first pipe；2 be argon inlet mouth；3 be argon gas gas outlet；4 be second pipe；5 be air aerosol
Injection port；6 be air aerosol outlet.
Specific embodiment
The application is further elaborated below in conjunction with specification drawings and specific embodiments.
Embodiment 1
A kind of air ventilation device, the device include coaxial first pipe 1 and second pipe 4, first pipe 1 and second
The material of pipeline 4 is PVC；The both ends of the first pipe 1 are respectively arranged with argon inlet mouth 2 and argon gas gas outlet 3；First pipe
It is tightly connected between road 1 and second pipe 4.
The second pipe 4 is located inside first pipe 1, and outer diameter is less than the internal diameter of first pipe 1；Second pipe 4
It is provided with equally distributed duct on tube wall, nucleopore membranes are enclosed on the outside of tube wall, the aperture of nucleopore membranes is 2 × 106A/cm3, hole
Diameter is 70nm；One end of second pipe 4 is the injection port 5 of air aerosol, and the other end is the outlet 6 of air aerosol and should
The outlet 6 of air aerosol is connect with the sampling system of ICP-MS；The injection port 5 of air aerosol and argon gas gas outlet 3
Correspondence is set, the outlet 6 of air aerosol is corresponding with argon inlet mouth 2, to realize that the adverse current of air aerosol and argon gas connects
Touching, ensure that gas displacement effect.
The outer diameter of the first pipe is 40mm, internal diameter 36mm, long 90cm.The outer diameter of the second pipe is 12mm,
Internal diameter is 8mm, long 100cm.The flow of the air aerosol is 0.9L/min, argon flow 9L/min.
Gas displacement is carried out using the device, the air content of aerosol outlet is less than 0.1%.
Embodiment 2
Unlike the first embodiment, the outer diameter of the first pipe is 50mm, internal diameter 44mm；The second pipe
Outer diameter is 14mm, internal diameter 10mm；The aperture of the nucleopore membranes is 2.5 × 106A/cm3, aperture 80nm.
The first pipe and the material of second pipe are stainless steel.
The flow of the air aerosol is 1.2L/min, argon flow 12L/min.
Embodiment 3
Unlike the first embodiment, the outer diameter of the first pipe is 30mm, internal diameter 26mm.The second pipe
Outer diameter is 10mm, internal diameter 8mm；
The aperture of the nucleopore membranes is 1.2 × 106A/cm3, aperture 60nm.
The first pipe and the material of second pipe are organic glass.
The flow of the air aerosol is 1L/min, and argon flow is the 9L/min of air aerosol flow.
Claims (9)
1. a kind of air ventilation device, which is characterized in that the device includes coaxial first pipe and second pipe；Described first
The both ends of pipeline are respectively arranged with argon inlet mouth and argon gas gas outlet；
The second pipe is located inside first pipe, and both ends are stretched out outside first pipe and outer diameter is less than the internal diameter of first pipe；
It is provided with equally distributed duct on the tube wall of second pipe, is enclosed with nucleopore membranes on the outside of tube wall；One end of second pipe is sky
The injection port of gas aerosol, the other end be air aerosol outlet and the air aerosol outlet and ICP-MS into
The connection of sample system；The injection port of air aerosol is corresponding with the position of argon gas gas outlet, the outlet and argon gas of air aerosol
The position of air inlet is corresponding, to realize the counter current contacting of air aerosol and argon gas.
2. a kind of air ventilation device according to claim 1, which is characterized in that the outer diameter of the first pipe be 30~
50mm, internal diameter are 4~6mm smaller than outer diameter.
3. a kind of air ventilation device according to claim 1, which is characterized in that the outer diameter of the second pipe be 10~
14mm, internal diameter are 2~4mm smaller than outer diameter.
4. a kind of air ventilation device according to claim 1, which is characterized in that the outer diameter of the first pipe is
40mm, internal diameter 36mm.
5. a kind of air ventilation device according to claim 1, which is characterized in that the outer diameter of the second pipe is
12mm, internal diameter 8mm.
6. a kind of air ventilation device according to claim 1, which is characterized in that the aperture of the nucleopore membranes is 106~
2.5×106A/cm3, aperture is 60~80nm.
7. a kind of air ventilation device according to claim 1, which is characterized in that the first pipe and second pipe
Material is PVC, stainless steel or organic glass.
8. a kind of air ventilation device according to claim 1, which is characterized in that the flow of the air aerosol is
0.8~1.2L/min, argon flow are 8~10 times of air aerosol flow.
9. a kind of air ventilation device according to claim 1, which is characterized in that the first pipe and second pipe it
Between be tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821279102.1U CN208580061U (en) | 2018-08-09 | 2018-08-09 | A kind of air ventilation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821279102.1U CN208580061U (en) | 2018-08-09 | 2018-08-09 | A kind of air ventilation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208580061U true CN208580061U (en) | 2019-03-05 |
Family
ID=65511971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821279102.1U Active CN208580061U (en) | 2018-08-09 | 2018-08-09 | A kind of air ventilation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208580061U (en) |
-
2018
- 2018-08-09 CN CN201821279102.1U patent/CN208580061U/en active Active
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