CN208406546U - A kind of multilayer planar film sampling device - Google Patents
A kind of multilayer planar film sampling device Download PDFInfo
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- CN208406546U CN208406546U CN201820537236.2U CN201820537236U CN208406546U CN 208406546 U CN208406546 U CN 208406546U CN 201820537236 U CN201820537236 U CN 201820537236U CN 208406546 U CN208406546 U CN 208406546U
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- cover board
- support frame
- film support
- film
- outer chamber
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Abstract
The utility model discloses a kind of multilayer planar film sampling device, including film support frame module, film support frame module is successively overrided to form by multilayer film support frame；Outer chamber inner hollow, film support frame module are loaded on hollow part, are provided with air slot on the inner wall of hollow part；Outer chamber side is equipped with air inlet cover board, and equipped with pumping cover board, the other side is equipped with exocoel cover board on top, and sliding cylinder is provided among exocoel cover board, inner cavity cover board is housed in sliding cylinder, opens mass spectrum injection port among the cover board of inner cavity.It is successively laminated and is mounted on inside outer chamber using modular film support frame, can be freely combined as required, modularized design is also convenient for the silicone rubber membrane of replacement damage.When using muti-piece film sample introduction, enrichment times, lowering apparatus detection limit can be further increased.It can separate but also be connected between inner chamber body and outer chamber, when interior exocoel separates, film is enriched with sample introduction；Convenient for rinsing when interior exocoel is connected to, reduce memory effect.
Description
Technical field
The utility model relates to the film sampling devices more particularly to a kind of multilayer planar film on a kind of gas analysis mass spectrogram instrument
Sampling device.
Background technique
Volatile organic matter (VOCs) is widely present in atmospheric environment, is the major pollutants in air.Detection volatilization
The method of property organic matter has very much, and mass spectral analysis is that on-line analysis is able to achieve in numerous methods, the weight of qualitative and quantitative detection
Want one of technology.Currently, the input mode that mass spectral analysis uses mainly has micropore sample introduction, capillary sample inlet and film sample introduction.It is micro-
Hole sample introduction requires machining accuracy high, and capillary sample inlet structure is simple, can according to need selection different inner diameters and length
Capillary.Both input modes can efficiently control air inflow, but due to not having enrichment function, so being difficult to examine
Measure volatile organic trace compounds.Film sampling system structure is simple, allows gaseous sample to enter directly into mass spectrometer system, sample
Without carrying out complicated pre-treatment, most importantly film sample introduction has enrichment function, and the response time of ultrathin membrane is short, can
Meet the needs of on-line analysis.
Silicone rubber membrane (polymethyl siloxane, PDMS) is most common membrane material.In the promotion of film two sides gas pressure difference
Under, by isolated sample due to molecular shape, size and the different solubility in film, infiltration rate is generated poor in film
It is different.The big component of permeability is enriched in high vacuum side, to achieve the purpose that separation and enrichment.Monofilm can make VOCs
10~100 times of enrichment, duplicature can arrive thousands of times, can be further improved bioaccumulation efficiency using the sampling device of multilayer film
Lowering apparatus detection limit.Under conditions of requiring instrument real-time detection, using monofilm sample introduction, guarantees certain detection limit and ring
It is most short between seasonable.When timeliness is of less demanding, double-deck or multilayer film sample introduction can be used, lowering apparatus detects to greatest extent
Limit.Under different testing conditions, need to select different sampling devices, and existing film sampling device is all monofilm, or
Person's duplicature can not be adjusted flexibly since structure limits.
Utility model content
The purpose of the utility model is to provide a kind of multilayer planar film sampling devices.
The purpose of this utility model is achieved through the following technical solutions:
The multilayer planar film sampling device of the utility model, including film support frame module, air inlet cover board, outer chamber, pumping
Cover board, exocoel cover board, inner cavity cover board, the film support frame module are successively overrided to form by multilayer film support frame；
The outer chamber inner hollow, the film support frame module are loaded on the hollow part, and its outer wall shape and institute
The inner wall shape matching of hollow part is stated, is provided with air slot on the inner wall of hollow part；
The air inlet cover board connect and seals with the outer chamber side, is provided with air inlet among air inlet cover board；
The exocoel cover board connect and seals with the outer chamber other side, is provided with sliding cylinder among exocoel cover board；
The pumping cover board connect and seals with the outer chamber upper surface, is evacuated among cover board and opens aspirating hole；
Mass spectrum injection port is opened among the inner cavity cover board, is mounted in the sliding cylinder among the exocoel cover board, it is described interior
The front of chamber lid plate compresses the film support frame module.
The multilayer planar provided by the embodiment of the utility model it can be seen from above-mentioned technical solution provided by the utility model
Film sampling device is successively laminated using modular film support frame and is mounted on inside outer chamber, can put a block film, two block films and
Muti-piece film, is freely combined as required, and in addition modularized design is also convenient for the silicone rubber membrane of replacement damage.Using muti-piece film into
When sample, enrichment times, lowering apparatus detection limit can be further increased.The inner cavity being made of film support frame module and inner cavity cover board
It can separate but also be connected between body and outer chamber, when interior exocoel separates, film is enriched with sample introduction；Convenient for rinsing when interior exocoel is connected to,
Reduce memory effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of film support frame in the utility model embodiment.
Fig. 2 is that silicone rubber membrane compresses schematic diagram in the utility model embodiment.
When Fig. 3 is that film is enriched with sample introduction in the utility model embodiment, multilayer planar film sampling device structural schematic diagram.
Fig. 4 is that operating condition schematic diagram is cleaned in the utility model embodiment.
In figure:
Film support frame 1, sample channel 2, press mold O-ring 3, spring 4, silicone rubber membrane 5, air inlet cover board 6, outer chamber 7, pumping
Cover board 8, exocoel cover board 9, inner cavity cover board 10, sealing ring 11, fixing screws 12, mass spectrum injection port 13.
Specific embodiment
The utility model embodiment will be described in further detail below.Do not make in the utility model embodiment in detail
The content of description belongs to the prior art well known to professional and technical personnel in the field.
The multilayer planar film sampling device of the utility model, preferable specific embodiment is:
Including film support frame module, air inlet cover board, outer chamber, pumping cover board, exocoel cover board, inner cavity cover board, the film branch
Support module is successively overrided to form by multilayer film support frame；
The outer chamber inner hollow, the film support frame module are loaded on the hollow part, and its outer wall shape and institute
The inner wall shape matching of hollow part is stated, is provided with air slot on the inner wall of hollow part；
The air inlet cover board connect and seals with the outer chamber side, is provided with air inlet among air inlet cover board；
The exocoel cover board connect and seals with the outer chamber other side, is provided with sliding cylinder among exocoel cover board；
The pumping cover board connect and seals with the outer chamber upper surface, is evacuated among cover board and opens aspirating hole；
Mass spectrum injection port is opened among the inner cavity cover board, is mounted in the sliding cylinder among the exocoel cover board, it is described interior
The front of chamber lid plate compresses the film support frame module.
O-ring seal is equipped between the inner cavity cover board and the sliding cylinder of the exocoel cover board.
It is provided with threaded hole on the wall of the sliding cylinder, and is fixed the inner cavity cover board by fixing screws.
The film support frame module includes film support frame, press mold O-ring, silicone rubber membrane, spring, among the film support frame
It is provided with the sample channel for arrangement of gathering, film support frame periphery is provided with O-ring groove, and film support frame four corners are respectively equipped with spring
Groove；
The press mold O-ring is mounted in the O-ring groove, and the silicone rubber membrane is covered on sample channel, side
Edge is compressed by press mold O-ring；
The spring is mounted in the spring channel, and film support frame, which successively laminates, described in multilayer is mounted on inside outer chamber
Middle vacancy.
The multilayer planar film sampling device of the utility model, the multilayer planar film of the silicone rubber membrane number of plies needed for being freely combined into
Sampling device is successively laminated using modular film support frame and is mounted on inside outer chamber, and a block film, two block films and muti-piece can be put
Film is freely combined as required, and in addition modularized design is also convenient for the silicone rubber membrane of replacement damage.Using muti-piece film sample introduction
When, enrichment times, lowering apparatus detection limit can be further increased.The inner chamber body being made of film support frame module and inner cavity cover board
It can separate but also be connected between outer chamber, when interior exocoel separates, film is enriched with sample introduction；Convenient for rinsing when interior exocoel is connected to, subtract
Small memory effect.
For convenience of understanding, brief introduction is done to the process of film sample introduction below:
The process of film sample introduction is divided into three steps: (1) selective absorption of the film surface to sample to be tested；(2) sample to be tested is formed
Concentration gradient penetrates into film；(3) sample to be tested is parsed in high vacuum side and is desorbed.Under the promotion of film pressure at both sides difference, to test sample
Different solubility of each component in film in product, infiltration rate generate difference, and according to similar compatibility principle, VOCs is molten in film
Xie Du is significantly larger than the components such as nitrogen, oxygen gas and water.The big VOCs of permeability can be enriched in high vacuum side, and process is rich layer by layer
Collection, concentration is significantly larger than former sample to be tested concentration, convenient for the detection of volatile organic trace compounds.
Specific embodiment:
As shown in Figure 1 to Figure 3, it specifically includes: film support frame module (Fig. 3, Fig. 4), air inlet cover board 6, outer chamber 7, pumping
Cover board 8, exocoel cover board 9, inner cavity cover board 10, sealing ring 11 and fixing screws 12.
7 inner hollow of outer chamber and shape and film support frame 1 match, and film support frame is slightly larger than in size.Generally
Increase 0.5mm in film support frame size, film support rack position is loose at this time, facilitates back-and-forth motion.It is opened on outer chamber inner wall
There is air slot, which is all connected to air inlet, aspirating hole.
The air inlet cover board 6 connect and seals with 7 side of outer chamber, drives stomata among air inlet cover board, for be passed through to
Sample or the high pure nitrogen of flushing.
The exocoel cover board 9 connect and seals with 7 other side of outer chamber, and sliding cylinder, sliding cylinder are provided among exocoel cover board
One circle is opened there are four threaded hole.
The pumping cover board 8 connect and seals with 7 upper surface of outer chamber, is evacuated among cover board and opens aspirating hole.
Mass spectrum injection port 13 is opened among the inner cavity cover board 10, is mounted in the sliding cylinder among exocoel cover board 9, it can be former
After slide.Cover board 10 front in inner cavity compresses film support frame module (Fig. 3, Fig. 4), and O-ring groove is opened at middle part.
The sealing ring 11 is mounted in the O-ring groove of inner cavity cover board 10, guarantees inner cavity cover board 10 and exocoel cover board 9
Sealing.
The fixing screws 12 are mounted at the threaded hole of exocoel cover board 9, and inner cavity cover board 10 passes through 9 centre of exocoel cover board
It is fixed with fixing screws 12 after sliding cylinder changes position.
The film support frame module, as shown in Figure 1, including film support frame 1, press mold O-ring 3, spring 4 and silicone rubber membrane 5.
Film support frame module, which successively laminates, to be mounted at 7 inner hollow of outer chamber, and a block film, two block films and muti-piece film can be put, according to
It needs to be freely combined.
It is matched at 1 shape of film support frame and 7 inner hollow of outer chamber, centre is provided with the sample channel 2 for arrangement of gathering.
Film support frame is provided with O-ring groove and four uniformly distributed spring channels.
The press mold O-ring 3 is mounted in the O-ring groove of film support frame 1.
The silicone rubber membrane 5 is prevented from as shown in Fig. 2, being covered on sample channel 2 by the compression of press mold O-ring 3.Quilt
The sample of enrichment can be stored in sample channel 2, continue to be enriched with into a tunic below.For the silicone rubber membrane of damage, only
The film support frame, the film more renewed need to be removed.Common silicone rubber membrane thickness has 20 microns, 50 microns, 100 microns etc..
The spring 4 is mounted in 1 spring channel of film support frame, and spring can be unclamped or be compressed.
There are two types of operating conditions, i.e. film enrichment sample introduction and cleaning for the multilayer planar film sampling device.When film is enriched with sample introduction, such as scheme
Shown in 3 by taking 4 layer plane silicone rubber membranes as an example.Inner cavity cover board 10 compresses film support frame module, the spring between adjacent membranes support frame 1
4 compressions, sealing ring sealing, composition is by the inner chamber body that film sandwich sample channel forms from level to level.Inner chamber body and exocoel at this time
Body partition, after the sample entered from sample holes flows through the surface of first layer film, the air slot through outer chamber enters bleeding point and is taken out
It walks.The sample holes that sample enters are low vacuum end, last tunic that mass spectrum injection port 13 connects is high vacuum end, in two side pressures
Under the promotion of power difference, test sample goes successively to next tunic enrichment after the enrichment of the first tunic, up through last tunic
Into mass spectrum injection port 13, start to detect.
Operating condition is cleaned as shown in figure 4, inner cavity cover board 10 is retracted, the spring 4 between adjacent membranes support frame 1 unclamps, each
Film support frame module all scatters each other under in spring pushing, then inner chamber body is sufficiently connected to outer chamber.Each sample channel
In remaining sample can be taken away from bleeding point, and from sample holes enter flushing gas can enter each sample channel punching
It washes, reduces memory effect caused by sample carryover.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should
Subject to the scope of protection of the claims.
Claims (4)
1. a kind of multilayer planar film sampling device, which is characterized in that including film support frame module, air inlet cover board, outer chamber, pumping
Cover board, exocoel cover board, inner cavity cover board, the film support frame module are successively overrided to form by multilayer film support frame；
The outer chamber inner hollow, the film support frame module be loaded on the hollow part, and its outer wall shape and it is described in
The inner wall shape at empty position matches, and is provided with air slot on the inner wall of hollow part；
The air inlet cover board connect and seals with the outer chamber side, is provided with air inlet among air inlet cover board；
The exocoel cover board connect and seals with the outer chamber other side, is provided with sliding cylinder among exocoel cover board；
The pumping cover board connect and seals with the outer chamber upper surface, is evacuated among cover board and opens aspirating hole；
Mass spectrum injection port is opened among the inner cavity cover board, is mounted in the sliding cylinder among the exocoel cover board, the interior chamber lid
The front of plate compresses the film support frame module.
2. multilayer planar film sampling device according to claim 1, which is characterized in that the inner cavity cover board and the exocoel
O-ring seal is equipped between the sliding cylinder of cover board.
3. multilayer planar film sampling device according to claim 2, which is characterized in that be provided with spiral shell on the wall of the sliding cylinder
Pit, and fixed the inner cavity cover board by fixing screws.
4. multilayer planar film sampling device according to claim 1,2 or 3, which is characterized in that the film support frame module
Including film support frame, press mold O-ring, silicone rubber membrane, spring, the sample channel for arrangement of gathering is provided among the film support frame,
Film support frame periphery is provided with O-ring groove, and film support frame four corners are respectively equipped with spring channel；
The press mold O-ring is mounted in the O-ring groove, and the silicone rubber membrane is covered on sample channel, edge quilt
Press mold O-ring compresses；
The spring is mounted in the spring channel, and film support frame described in multilayer, which successively laminates, to be mounted on inside outer chamber
Vacancy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820537236.2U CN208406546U (en) | 2018-04-16 | 2018-04-16 | A kind of multilayer planar film sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820537236.2U CN208406546U (en) | 2018-04-16 | 2018-04-16 | A kind of multilayer planar film sampling device |
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| Publication Number | Publication Date |
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| CN208406546U true CN208406546U (en) | 2019-01-22 |
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| CN201820537236.2U Active CN208406546U (en) | 2018-04-16 | 2018-04-16 | A kind of multilayer planar film sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108310927A (en) * | 2018-04-16 | 2018-07-24 | 中国科学技术大学 | A kind of multilayer planar film sampling device |
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2018
- 2018-04-16 CN CN201820537236.2U patent/CN208406546U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108310927A (en) * | 2018-04-16 | 2018-07-24 | 中国科学技术大学 | A kind of multilayer planar film sampling device |
| CN108310927B (en) * | 2018-04-16 | 2023-11-28 | 中国科学技术大学 | Multilayer planar film sampling device |
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