CN210834362U

CN210834362U - Gas sampler

Info

Publication number: CN210834362U
Application number: CN201921625972.4U
Authority: CN
Inventors: 周伟; 李晓明; 颜晓元
Original assignee: Institute of Soil Science of CAS
Current assignee: Institute of Soil Science of CAS
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-23
Anticipated expiration: 2029-09-27

Abstract

A gas sampler belongs to the technical field of gas samplers. The sampler comprises a first absorption device, a second absorption device, absorption liquid, a straight-through pipe and a gas collection bottle, wherein the first absorption device comprises an air inlet pipe a, a right-angle pneumatic connector, an air outlet pipe a, a bottle stopper a, an organic glass bottle a, a magnetic stirring device and a rotor, the second absorption device comprises an air inlet pipe b, an air outlet pipe b, a right-angle pneumatic connector, a bottle stopper b and an organic glass bottle b, and the absorption liquid is filled in the middle lower part of the organic glass bottle a and the organic glass bottle b respectively; the first absorption device and the second absorption device are connected through a straight-through pipe, and the gas collecting bottle is connected with the gas outlet pipe of the second absorption device. The sampler has the advantages of acid and alkali resistance, firmness and durability, difficult breakage, uniform aeration of the used aeration head, high absorption efficiency, accurate experiment and the like, makes up for the defects of the Meng's air suction bottle, and is particularly suitable for gas sampling experiments with high air suction rate under field conditions.

Description

Gas sampler

Technical Field

The utility model belongs to the technical field of the gas sampling ware, concretely relates to gas sampling ware.

Background

Present existing gas sampling ware selects the meng formula wash-bottle of glass material more as gas absorption liquid to hold the container, and the meng formula wash-bottle specification is comparatively unanimous, and is unable the customization, because adopt the glass material more, easy breakage for when the field monitoring experiment, often because misoperation causes glass breakage, leads to the experiment failure. During sampling, the air inlet and the air outlet of the Meng wash bottle are generally connected with a sampling pump through a silicone tube, and in actual operation, the tightness is not tight due to the fact that the aperture of the silicone tube is not proper. In addition, the aeration head of the Meng wash bottle is small, the aeration area is limited, when air is pumped and sampled, airflow quickly passes through the aeration head, huge bubbles can be formed, when the bubbles burst, a large amount of water drops are generated and run off along with the airflow, the absorption efficiency is reduced, and especially when the experiment needs and the air pumping speed is high, the loss amount of absorption liquid caused by the burst of bubbles is very large, and great errors are brought to the experiment; when the absorption liquid is poured out from the bottle mouth, the manual error is large, and the research on volatile gas is inconvenient.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows: to have among the prior art that the leakproofness is poor, the aeration area is limited and experimental error waits technical problem greatly, the utility model provides a gas sampler, this sample thief have acid and alkali-resistance, sturdy and durable, difficult breakage, used aeration head aeration is even, absorption efficiency is high and experiment advantage such as accurate, have compensatied the defect of meng's air suction bottle.

The technical scheme is as follows: a gas sampler comprises a first absorption device, a second absorption device, absorption liquid, a straight pipe and a gas collection bottle, wherein the first absorption device comprises a gas inlet pipe a, a right-angle pneumatic joint, a gas outlet pipe a, a bottle plug a, an organic glass bottle a, a magnetic stirring device and a rotor, the organic glass bottle a comprises a bottle body a, a vacuum air exhaust branch pipe a, an absorption liquid outlet a and a rubber plug, the bottle body a is a cylinder with a sealed bottom end, an open top end and an internal cavity, the vacuum air exhaust branch pipe a is arranged at the top of the bottle body a, the absorption liquid outlet a is arranged at the bottom edge of the bottle body a, the rubber plug respectively seals the vacuum air exhaust branch pipe a and the absorption liquid outlet a, and the bottle plug a is movably connected with the open end of the bottle body a and used; the air inlet pipe a comprises a pipe body a and an aeration head, wherein the top of the pipe body a is a cylindrical thin pipe, the middle part and the bottom part of the pipe body a are cylindrical thick pipes with the inner diameters expanded by at least 2 times, the aeration head is connected with the bottom end of the pipe body a, the top of the pipe body a penetrates through a bottle stopper a to be connected with one end of a right-angle pneumatic connector, the rest part of the pipe body a is arranged in the bottle body a, and the aeration head is arranged at the bottom of the bottle body a and is not in contact with the bottom wall; the air inlet at the bottom end of the air outlet pipe a is arranged at the top of the bottle body a, and the air outlet at the top end of the air outlet pipe a penetrates through the bottle stopper a to be connected with one end of another right-angle pneumatic connector; the rotor is arranged on the inner surface of the bottom wall of the bottle body a, and the organic glass bottle a is movably connected to the top of the magnetic stirring device;

the second absorption device comprises an air inlet pipe b, an air outlet pipe b, a right-angle pneumatic connector, a bottle plug b and an organic glass bottle b, wherein the organic glass bottle b comprises a bottle body b, a vacuum air exhaust branch pipe b, an absorption liquid outlet b and a rubber plug, the bottle body b is a cylinder with a sealed bottom end, an open top end and an internal cavity, the vacuum air exhaust branch pipe b is arranged at the top of the bottle body b, the absorption liquid outlet b is arranged at the bottom end edge of the bottle body b, the rubber plug respectively seals the vacuum air exhaust branch pipe b and the absorption liquid outlet b, and the bottle plug b is movably connected to the open end of the bottle body b and used for sealing the; the air inlet pipe b comprises a pipe body b and a micropore short pipe, the pipe body b is an internal hollow cylindrical cavity with two open ends, the top of the pipe body b penetrates through a bottle stopper b to be connected with one end of a right-angle pneumatic connector, the rest part of the pipe body b is arranged inside the bottle body b, the micropore short pipe is an internal cavity cylinder with a sealed bottom end and an open top end, the pipe wall is provided with micropores, the top end of the micropore short pipe is in seamless connection with the bottom end of the pipe body b, and the bottom end of the micropore short pipe is close to the inner surface of the; the air inlet at the bottom end of the air outlet pipe b is arranged at the top of the bottle body b, and the air outlet at the top end of the air outlet pipe b penetrates through the bottle plug b to be connected with one end of the other right-angle pneumatic connector;

the absorption liquid is respectively filled in the middle lower parts of the organic glass bottle a and the organic glass bottle b, and the filling heights are respectively lower than the bottom ends of the air outlet pipe a and the air outlet pipe b;

the straight-through pipe is a cylindrical pipe with a spherical bulge at the air inlet end, the air inlet end of one straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air outlet pipe a, and the air outlet end of the straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air inlet pipe b; the air inlet end of the straight-through pipe is connected with the gas to be detected, and the air outlet end of the straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air inlet pipe a; the air inlet end of the other straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air outlet pipe b, and the air outlet end of the straight-through pipe is connected with the air inlet of the air collecting bottle.

Preferably, the diameter of the top end of the bottle stopper a is larger than that of the opening end of the bottle body a, and the diameter of the bottom end of the bottle stopper a is smaller than that of the opening end of the bottle body a; the diameter of the top end of the bottle stopper b is larger than that of the opening end of the bottle body b, and the diameter of the bottom end of the bottle stopper b is smaller than that of the opening end of the bottle body b.

Preferably, the air inlet pipe a, the air outlet pipe a, the straight-through pipe, the air inlet pipe b and the air outlet pipe b are respectively polytetrafluoroethylene hoses.

Preferably, the bottle stopper a and the bottle stopper b are silica gel stoppers.

Preferably, the aeration head is a bubble stone which is formed by sintering white corundum, silicon carbide and carborundum, and the surface of the bubble stone is distributed with pores with the pore diameter of 100 mu m.

Preferably, the bottom ends of the organic glass bottle a and the organic glass bottle b are respectively in a wedge shape, and the absorption liquid outlet a and the absorption liquid outlet b are respectively arranged at the thinnest edges of the bottom ends of the organic glass bottle a and the organic glass bottle b.

Preferably, the outer surfaces of the organic glass bottle a and the organic glass bottle b are respectively provided with scales.

Preferably, the magnetic stirring device is a miniature magnetic stirrer.

Has the advantages that: 1. this is novel carries out the collection of the gas that awaits measuring through first absorbing device and second absorbing device respectively, and the gas that awaits measuring further absorbs through second absorbing device after first absorbing device is preliminary absorbed, can reduce because dissolve the artifical error that insufficiently causes.

2. This novel volatile gas sampling device not only can be regarded as, the gas washing device can also be regarded as. When the gas collecting bottle is used as a gas washing device, washed gas is collected through the gas collecting bottle; when the device is used as a volatile gas sampling device, the absorption liquid is poured out from the absorption liquid outlet, and the volatile gas is further detected by detecting the absorption liquid.

3. This is novel to be equipped with the vacuum branch pipe of bleeding at organic glass bottle top, when carrying out gas collection, draws the air on organic glass bottle upper portion with the vacuum pump from the vacuum branch pipe of bleeding earlier, when as the gas washing device, can avoid the influence of the sample of air gathering in to the gas collecting bottle in the organic glass bottle.

4. This is novel body bottom edge is located in the absorption liquid export to organic glass bottle bottom is the wedge respectively, and the minimum edge in organic glass bottle bottom is located in the absorption liquid export, when pouring the absorption liquid, can avoid the absorption liquid to be stained with on the bottle wall and lead to the absorption liquid to reduce, and can make the absorption liquid more easily totally poured.

5. This novel inside aeration head that is equipped with of first absorbing device, the bottom is equipped with magnetic stirring device, the aeration head adopts by white corundum, the bubbling stone that carborundum and carborundum sintered under 1500 ℃'s high temperature and form, the gas pocket that the aperture is 100 mu m is covered with on the bubbling stone surface, the bubble of production is comparatively fine and smooth, the bubble is less, the bubble is more big with the area of contact of absorption liquid, absorption efficiency has been improved, when the bubble exposes the surface of water to burst, the drop of water dynamics of splashing is little, can not run off along with the air current, combine the stirring to make to be absorbed or gather by the absorption liquid more easily by gathering gaseous.

6. This novel second absorbing device intake pipe bottom is close to pipe shaft b diapire internal surface, and gaseous sputtering is to body b bottom through the micropore nozzle stub, has increased the area of contact with the absorption liquid, impurity in the absorption gas that can be on the widest range.

7. The novel organic glass bottle is used as a container, and is firm and durable; the tetrafluoroethylene hose and the right-angle pneumatic joint are used as an air inlet channel and an air outlet channel, and are tightly connected, so that the air tightness is improved; the air inlet pipe is transparent, and the air outlet pipe is orange red, so that the identification degree is increased, and errors in connecting pipelines are avoided; the experimental error is reduced.

This is novel gas sample thief is particularly suitable for under the field condition, the gas sampling experiment that the pumping rate is high.

Drawings

FIG. 1 is a schematic structural diagram of the device of the present invention;

FIG. 2 is a schematic view of a first absorbent device;

FIG. 3 is a schematic view of a second absorbent device;

fig. 4 is a schematic structural view of the intake pipe b of the second absorbing device.

The numerical designations in the drawings represent the following: 1. an air inlet pipe a; 2. a right-angle pneumatic joint; 3. an air outlet pipe a; 4. a bottle stopper a; 5. an organic glass bottle a; 6. an absorption liquid; 7. an aeration head; 8. a vacuum pumping branch pipe a; 9. an absorption liquid outlet a; 10. a magnetic stirring device; 11. a rotor; 12. calibration; 13. an air inlet pipe b; 14. an air outlet pipe b; 15. a bottle stopper b; 16. an organic glass bottle b; 17. a microporous short pipe; 18. a vacuum pumping branch pipe b; 19. an absorption liquid outlet b; 20. a gas collection bottle; 21. a straight pipe.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1

A gas sampler, see fig. 1, comprises a first absorption means, a second absorption means, an absorption liquid, a straight pipe 21 and a gas collecting bottle 20.

Referring to fig. 2, the first absorption device includes an air inlet pipe a1, a right-angle pneumatic connector 2, an air outlet pipe a 3, a bottle stopper a4, an organic glass bottle a 5, a magnetic stirring apparatus 10 and a rotor 11, the organic glass bottle a 5 includes a bottle body a, a vacuum air exhaust branch pipe a8, an absorption liquid outlet a 9 and a rubber stopper, the bottle body a is a cylinder with a sealed bottom end, an open top end and an internal cavity, the vacuum air exhaust branch pipe a8 is arranged at the top of the bottle body a, the absorption liquid outlet a 9 is arranged at the bottom edge of the bottle body a, the rubber stopper respectively seals the vacuum air exhaust branch pipe a8 and the absorption liquid outlet a 9, and the bottle stopper a4 is movably connected to the open end of the bottle body a and is; the air inlet pipe a1 comprises a pipe body a and an aeration head 7, wherein the top of the pipe body a is a cylindrical thin pipe, the middle part and the bottom part of the pipe body a are cylindrical thick pipes with the inner diameters expanded by at least 2 times, the aeration head 7 is connected with the bottom end of the pipe body a, the top of the pipe body a penetrates through a bottle stopper a4 to be connected with one end of a right-angle pneumatic connector, the rest part of the pipe body a is arranged in the bottle body a, and the aeration head 7 is arranged at the bottom of the bottle body a and is not in contact with the bottom wall; the air inlet at the bottom end of the air outlet pipe a 3 is arranged at the top of the bottle body a, and the air outlet at the top end passes through the bottle stopper a4 and is connected with one end of another right-angle pneumatic connector; the rotor 11 is arranged on the inner surface of the bottom wall of the bottle body a, and the organic glass bottle a 5 is movably connected to the top of the magnetic stirring device 10;

referring to fig. 3 and 4, the second absorption device includes an air inlet pipe b 13, an air outlet pipe b14, a right-angle pneumatic joint, a bottle plug b 15 and an organic glass bottle b16, the organic glass bottle b16 includes a bottle body b, a vacuum pumping branch pipe b 18, an absorption liquid outlet b 19 and a rubber plug, the bottle body b is a cylinder with a sealed bottom end, an open top end and an internal cavity, the vacuum pumping branch pipe b (18) is arranged at the top of the bottle body b, the absorption liquid outlet b 19 is arranged at the bottom end edge of the bottle body b, the rubber plug respectively seals the vacuum pumping branch pipe b 18 and the absorption liquid outlet b 19, and the bottle plug b 15 is movably connected to the open end of the bottle body b and is used for sealing the bottle body; the air inlet pipe b 13 comprises a pipe body b and a micropore short pipe 17, the pipe body b is an internal hollow cylindrical cavity with openings at two ends, the top of the pipe body b penetrates through a bottle stopper b 15 to be connected with one end of a right-angle pneumatic connector, the rest part of the pipe body b is arranged inside the pipe body b, the micropore short pipe 17 is an internal cavity cylinder with a sealed bottom end and an opening at the top end, a micropore is formed in the pipe wall of the micropore short pipe 17, the top end of the micropore short pipe 17 is in seamless connection with the bottom end of the pipe body b, and the bottom end of the micropore short; the air inlet at the bottom end of the air outlet pipe b14 is arranged at the top of the bottle body b, and the air outlet at the top end passes through the bottle stopper b 15 and is connected with one end of another right-angle pneumatic connector;

the absorption liquid is respectively filled in the middle lower parts of the organic glass bottle a 5 and the organic glass bottle b16, and the filling heights are respectively lower than the bottom ends of the air outlet pipe a 3 and the air outlet pipe b 14;

the straight-through pipe 21 is a cylindrical pipe with a spherical bulge at the air inlet end, the air inlet end of one straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air outlet pipe a 3, and the air outlet end of the straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air inlet pipe b 13; the air inlet end of the straight-through pipe is connected with the gas to be detected, and the air outlet end of the straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air inlet pipe a 1; the air inlet end of the other straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air outlet pipe b14, and the air outlet end is connected with the air inlet of the air collecting bottle 20.

The gas sampler is specifically used as follows: respectively injecting absorption liquid 6 into an organic glass bottle a 5 and an organic glass bottle b16, respectively assembling a first absorption device and a second absorption device, then respectively connecting an air outlet pipe a 3 and an air inlet pipe b 13 through a straight-through pipe through a right-angle pneumatic connector, and then connecting an air collecting bottle 20 with an air outlet pipe b14 through a right-angle pneumatic connector through a straight-through pipe. Then the vacuum pump is used to pump the air on the upper parts of the organic glass bottle a 5 and the organic glass bottle b16 from the vacuum pumping branch pipe, then the rubber stopper is used to seal the vacuum pumping branch pipe, and the magnetic stirring device 10 is opened. The gas to be detected enters an organic glass bottle a 5 through an air inlet end of a straight-through pipe through an air inlet pipe a1, the gas is dispersed into micromolecular gas through an aeration stone 7, the micromolecular gas can be more fully washed by absorption liquid under the stirring action of a rotor 11, the washed gas enters an air outlet pipe a 3 from the upper part of a bottle body a, then enters an organic glass bottle b16 through an air inlet pipe b 13 after being buffered by the straight-through pipe, the gas is sputtered to the bottom of the bottle body b through a micropore short pipe, the contact area of the gas and the absorption liquid 6 is increased, impurities in the gas can be absorbed to the maximum extent, the gas washed by the absorption liquid enters the upper part of the bottle body b from the bottom of the absorption liquid and then enters a gas collecting bottle 20 through an air outlet pipe b14 and the straight-through pipe, when the absorption liquid is detected, rubber plugs of an absorption liquid outlet a 9 and an absorption liquid outlet b 19 are taken down, and finally completing the gas collection process.

Example 2

The difference from the embodiment 1 is that the height of the organic glass bottle a 5 is 25 cm, the diameter of the bottom of the bottle is 5 cm., the diameter of the top end of the bottle plug a4 is greater than the diameter of the open end of the bottle a, the diameter of the bottom end of the bottle plug a is less than the diameter of the open end of the bottle a, the specification of the bottle plug a4 is 50.8 (small end diameter) × 62.7.7 (large end diameter) × 25 (height), the material is a silica gel plug, the diameter of the top cylindrical thin tube of the air inlet pipe a1 is 6 mm, the diameters of the middle and bottom cylindrical thick tubes are 12 mm, the aeration head 7 is a bubble stone, the bubble stone is formed by sintering white corundum, silicon carbide and carborundum at the high temperature of 1500 ℃, the diameter of the bubble stone is 35 mm, the surface of the bubble stone is fully distributed with air holes with the aperture of 100 μm, the generated bubbles are fine and fine, the contact area between the bubbles is larger, the absorption efficiency is improved, and when the bubbles are exposed out of the water surface and burst, the water bead strength is small, the experiment error.

The height of the body of the organic glass bottle b16 is 30 cm, the diameter of the bottom of the bottle is 5 cm., the diameter of the top end of the bottle plug b 15 is larger than the diameter of the opening end of the bottle body b, the diameter of the bottom end of the bottle plug b is smaller than the diameter of the opening end of the bottle body b, the specification is 50.8 (small end diameter) × 62.7.7 (large end diameter) × 25 (height) mm, the material is a silica gel plug, the diameter of the air inlet pipe b 13 is 6 mm, and the height of the micropore short pipe 17 is.

The air inlet ends of the air outlet pipes a 3 (the air outlet pipes b 14) are respectively arranged at the top of the bottle body a (the bottle body b) and 2 cm away from the lower surface of the bottle stopper a4 (the bottle stopper b 15). The air inlet end of the air inlet pipe a1 (the air inlet pipe b 13) penetrates through the bottle body a (the bottle body b) and is 4 cm higher than the upper surface of the bottle stopper a4 (the bottle stopper b 15). The air inlet pipe a1 and the air inlet pipe b 13 are respectively transparent, and the air outlet pipe a 3 and the air outlet pipe b14 are respectively orange red, so that the identification degree is increased, and mistakes are avoided when connecting pipelines.

The bottom of organic glass bottle a 5 and organic glass bottle b16 is the wedge respectively, and absorption liquid export a 9 and absorption liquid export b 19 locate organic glass bottle a 5 and the thinnest edge of organic glass bottle b16 bottom respectively, when empting the absorption liquid, reduction human error that can the at utmost makes liquid more easily be poured totally in the bottle. The outer surface of organic glass bottle a 5 and organic glass bottle b16 is equipped with scale 12 respectively, can be convenient for operating personnel reads the volume of absorption liquid. The magnetic stirring device 10 is a micro magnetic stirrer, and the magnetic stirring device 10 is used for stirring the absorption liquid so as to enable the gas to be more fully dissolved into the absorption liquid.

The air inlet pipe a1, the air outlet pipe a 3, the straight-through pipe, the air inlet pipe b 13 and the air outlet pipe b14 are respectively polytetrafluoroethylene hoses. The internal diameter of right angle pneumatic connector 2 is 6 mm, and every right angle pneumatic connector is connected with the inlet end of intake pipe and the end of giving vent to anger of outlet duct respectively, and right angle pneumatic connector can with polytetrafluoroethylene hose high-speed joint, and closely link to each other, has improved the gas tightness.

Example 3

By adopting the device of the embodiment 2 and taking farmland ammonia volatilization sampling as an example, the specific use process is as follows:

the ammonia volatilization sampling cover is inserted into the depth of 5 cm of the farmland, and the sampling cover, the gas sampler prepared in the embodiment 2, the straight pipe connected with the gas inlet pipe a1 and the air pump are sequentially connected by utilizing a PVC hard pipe. In this embodiment, the absorption liquid 6 is dilute sulfuric acid. Before the start of monitoring, 100 mL of dilute sulfuric acid was first divided into two equal portions and fed to the first absorption unit and the second absorption unit, respectively. Then, the air pump is started to pump air, and the air pumping flow is 20L/min. Selecting 8:00-10:00 to carry out field monitoring work, filling the absorption liquid in the gas sampler into a plastic bottle after air suction is finished, taking the plastic bottle back to a laboratory, and carrying out colorimetric determination on NH in the absorption liquid by using indophenol blue₄ ⁺-N concentration. And (4) according to the sampling time, measuring and calculating the ammonia volatilization amount of the farmland by the sampling cover surface area.

Claims

1. A gas sampler is characterized in that the sampler comprises a first absorption device, a second absorption device, absorption liquid, a straight-through pipe (21) and a gas collecting bottle (20),

the first absorption device comprises an air inlet pipe a (1), a right-angle pneumatic connector, an air outlet pipe a (3), a bottle stopper a (4), an organic glass bottle a (5), a magnetic stirring device (10) and a rotor (11), wherein the organic glass bottle a (5) comprises a bottle body a, a vacuum air exhaust branch pipe a (8), an absorption liquid outlet a (9) and a rubber stopper, the bottle body a is a cylinder with a sealed bottom end, an open top end and an internal cavity, the vacuum air exhaust branch pipe a (8) is arranged at the top of the bottle body a, the absorption liquid outlet a (9) is arranged at the bottom edge of the bottle body a, the rubber stopper respectively seals the vacuum air exhaust branch pipe a (8) and the absorption liquid outlet a (9), and the bottle stopper a (4) is movably connected to the open end of the bottle body a and used for sealing; the air inlet pipe a (1) comprises a pipe body a and an aeration head (7), wherein the top of the pipe body a is a cylindrical thin pipe, the middle part and the bottom part of the pipe body a are cylindrical thick pipes with the inner diameters expanded by at least 2 times, the aeration head (7) is connected with the bottom end of the pipe body a, the top of the pipe body a penetrates through a bottle stopper a (4) to be connected with one end of a right-angle pneumatic connector, the rest parts of the pipe body a are arranged inside the bottle body a, and the aeration head (7) is arranged at the bottom of the bottle body a and is not in contact with the bottom wall; the air inlet at the bottom end of the air outlet pipe a (3) is arranged at the top of the bottle body a, and the air outlet at the top end of the air outlet pipe a (3) penetrates through the bottle stopper a (4) to be connected with one end of another right-angle pneumatic connector; the rotor (11) is arranged on the inner surface of the bottom wall of the bottle body a, and the organic glass bottle a (5) is movably connected to the top of the magnetic stirring device (10);

the second absorption device comprises an air inlet pipe b (13), an air outlet pipe b (14), a right-angle pneumatic connector, a bottle plug b (15) and an organic glass bottle b (16), the organic glass bottle b (16) comprises a bottle body b, a vacuum air exhaust branch pipe b (18), an absorption liquid outlet b (19) and a rubber plug, the bottle body b is a cylinder with a sealed bottom end, an open top end and an internal cavity, the vacuum air exhaust branch pipe b (18) is arranged at the top of the bottle body b, the absorption liquid outlet b (19) is arranged at the bottom end edge of the bottle body b, the rubber plug respectively seals the vacuum air exhaust branch pipe b (18) and the absorption liquid outlet b (19), and the bottle plug b (15) is movably connected to the open end of the bottle body b and used for sealing the bottle body; the air inlet pipe b (13) comprises a pipe body b and a micropore short pipe (17), the pipe body b is an internal hollow cylindrical cavity with two open ends, the top of the pipe body b penetrates through a bottle plug b (15) to be connected with one end of the right-angle pneumatic connector, the rest part of the pipe body b is arranged inside the bottle body b, the micropore short pipe (17) is an internal cavity cylinder with a sealed bottom end and an open top end, a micropore is formed in the pipe wall of the internal cavity cylinder, the top end of the micropore short pipe (17) is in seamless connection with the bottom end of the pipe body b, and the bottom end of the micropore short pipe (17) is close; the air inlet at the bottom end of the air outlet pipe b (14) is arranged at the top of the bottle body b, and the air outlet at the top end of the air outlet pipe b passes through the bottle stopper b (15) to be connected with one end of the other right-angle pneumatic connector;

the absorption liquid is respectively filled in the middle lower parts of the organic glass bottle a (5) and the organic glass bottle b (16), and the filling heights are respectively lower than the bottom ends of the air outlet pipe a (3) and the air outlet pipe b (14);

the straight-through pipe (21) is a cylindrical pipe with a spherical bulge at the air inlet end, the air inlet end of one straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air outlet pipe a (3), and the air outlet end of the straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air inlet pipe b (13); the air inlet end of the straight-through pipe is connected with the gas to be detected, and the air outlet end of the straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air inlet pipe a (1); the air inlet end of the other straight-through pipe is connected with the other end of the right-angle pneumatic connector connected with the air outlet pipe b (14), and the air outlet end is connected with the air inlet of the air collecting bottle (20).

2. The gas sampler of claim 1, wherein the stopper a (4) has a top diameter larger than the open end diameter of the body a and a bottom diameter smaller than the open end diameter of the body a; the diameter of the top end of the bottle stopper b (15) is larger than that of the opening end of the bottle body b, and the diameter of the bottom end of the bottle stopper b (15) is smaller than that of the opening end of the bottle body b.

3. The gas sampler according to claim 1, wherein the gas inlet pipe a (1), the gas outlet pipe a (3), the straight pipe, the gas inlet pipe b (13) and the gas outlet pipe b (14) are respectively polytetrafluoroethylene hoses.

4. A gas sampler as claimed in claim 1 wherein the stopper a (4) and the stopper b (15) are silicone stoppers.

5. The gas sampler according to claim 1, wherein the aeration head (7) is a bubble stone, the bubble stone is sintered from white corundum, silicon carbide and silicon carbide, and the surface of the bubble stone is distributed with pores with the diameter of 100 μm.

6. The gas sampler according to claim 1, wherein the bottom ends of the plexiglass bottle a (5) and the plexiglass bottle b (16) are respectively wedge-shaped, and the absorbing liquid outlet a (9) and the absorbing liquid outlet b (19) are respectively arranged at the thinnest edges of the bottom ends of the plexiglass bottle a (5) and the plexiglass bottle b (16).

7. The gas sampler as claimed in claim 1, wherein the plexiglas bottle a (5) and the plexiglas bottle b (16) are provided with respective graduations on their outer surfaces.

8. A gas sampler according to claim 1 wherein the magnetic stirrer means (10) is a miniature magnetic stirrer.