CN202281715U - Adsorption tube taking molecular sieve as filler - Google Patents
Adsorption tube taking molecular sieve as filler Download PDFInfo
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- CN202281715U CN202281715U CN2011202527393U CN201120252739U CN202281715U CN 202281715 U CN202281715 U CN 202281715U CN 2011202527393 U CN2011202527393 U CN 2011202527393U CN 201120252739 U CN201120252739 U CN 201120252739U CN 202281715 U CN202281715 U CN 202281715U
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Abstract
The utility model discloses an adsorption tube taking a molecular sieve as a filler. The adsorption tube comprises an adsorption tube body and a filler, wherein the adsorption tube body is a stainless steel tube/glass tube (1) coated with an inertia coating on the surface; the filler in the adsorption tube body consists of a glass cotton/stainless steel screen (2), a polytetrafluoroethylene film (3) and an adsorbent; the adsorption tube is characterized in that: the stainless steel tube/glass tube (1) is sequentially filled with the glass cotton/stainless steel screen (2), the polytetrafluoroethylene film (3), a ZSM-5 molecular sieve filler (4), the polytetrafluoroethylene film (3) and the glass cotton/stainless steel screen (2) from left to right; and the ZSM-5 molecular sieve filler is an adsorbent filler. In the utility model, the adsorption tube is made by taking the ZSM-5 molecular sieve as an adsorbent, and can be used for adsorbing and enriching the small-molecular benzenes in multiple types of samples such as environment, material and the like so that the adsorption tube can perform analysis and test of the substances such as benzene, methylbenzene, ethylbenzene, dimethylbenzene and the like containing small-molecular benzenes samples with high selectivity.
Description
Technical field
The utility model relates to a kind of adsorption tube that adsorbs micromolecule benzene series thing, and relating more specifically to a kind of is the adsorption tube of the absorption micromolecule benzene series thing of filler with the ZSM-5 molecular sieve.
Background technology
The benzene series thing generally is benzene, toluene, ethylbenzene, P-xylene, m-xylene, o-xylene, isopropyl benzene, cinnamic general designation; It is the compound of seeing most in atmospheric environment and a lot of pollution source gas; Health is all had certain damaging effect, is the important pollutant of environment.
In recent years; The air quality of China is generally polluted; The level of organic pollutants in the high low energy direct representation atmosphere of benzene series thing content; So in environmental impact assessment, substantial pollution accident, environmental pollution dispute and daily detection, scientific research, the assay of benzene series thing all has comparatively widely to be used.
The sampling of benzene series thing can be adopted Summa jar sampling technique or adsorption tube concentration method in the surrounding air, the decomposition when the penetrating when advantage of jar sampling technique is can avoid adopting the adsorbent sampling, desorb, but its cost is higher, and complicated operation is unfavorable for popularizing.Advantages such as the adsorption tube concentration method is because to have equipment simple, easy and simple to handle, and the sample retention time is long become the present most popular method of sampling.
The adsorbent that is usually used in the adsorption tube commonly used at present has activated charcoal and Tenax adsorbent etc., can pass through solvent desorption or thermal desorption after the sampling, and the benzene series thing is transferred to gas chromatography from solid adsorbent, carries out assay determination.Though but with activated charcoal and Tenax adsorption tube adsorbent kind wide scope as adsorbent; But the selectivity to the predetermined substance kind is not strong, is prone to adsorb simultaneously multiple material, in the later stage test; The mutual interference of various material phase is for interpretation of result brings difficulty.And ZSM-5 molecular sieve adsorption aperture and benzene, toluene, ethylbenzene, xylene equimolecular diameter are very approaching, therefore this micromolecular benzene series thing are had very strong selection adsorptive power.Therefore, the utility model adopts the ZSM-5 molecular sieve as adsorbent, processes adsorption tube, is used for selective adsorption sample micromolecule benzene series thing, to solve the deficiency of activated charcoal and Tenax adsorbent.
Summary of the invention
The technical matters that the utility model will solve:
For overcome in the prior art analyse the appearance configuration with pyrolysis the commercialization adsorption tube to the not strong problem of benzene series thing selectivity; The utility model provides a kind of ZSM-5 molecular sieve adsorption pipe; This adsorption tube can be used in the absorption and the enrichment of micromolecule benzene series thing in the polymorphic type samples such as environment, material, makes it can highly selective carry out analytical test to containing materials such as benzene in the micromolecule benzene series matter sample, toluene, ethylbenzene, xylene.
The product technology scheme of the utility model is:
A kind of is the adsorption tube of filler with the molecular sieve; Comprise absorption body and filler; The absorption body is stainless-steel tube/glass tube 1 that surfaces coated is covered with inert coatings; Absorption body inner stuffing is glass wool/stainless steel mesh 2, poly tetrafluoroethylene 3 and adsorbent; The material of filling in the stainless-steel tube/glass tube 1 of this adsorption tube from left to right is followed successively by glass wool/stainless steel mesh 2, poly tetrafluoroethylene 3, ZSM-5 molecular sieve filling 4, poly tetrafluoroethylene 3, glass wool/stainless steel mesh 2, and wherein, the ZSM-5 molecular sieve filling is the adsorbent filler.
The addition of ZSM-5 molecular sieve filling is 100mg～500mg in the said adsorption tube; The silica alumina ratio of ZSM-5 molecular sieve can select any one or the multiple combination in 50,100,200,300,400,500; The particle diameter of ZSM-5 molecular sieve can be selected any one or the multiple combination in 20/40 order, 40/60 order, 60/80 order, 80/100 order, 100/120 order.Preferred silica alumina ratio is 50, and particle diameter is that 60/80 purpose ZSM-5 molecular sieve is as the adsorbent filler.
The adsorbent filler of Different Silicon aluminum ratio can be controlled the particle diameter and the activated centre of adsorbent filler in the adsorption tube, thereby reach the selectivity of benzene series thing is controlled.The ZSM-5 molecular sieve of described selection different-grain diameter can control the rate of adsorption as the adsorbent filler.
Preparation method's technical scheme of the utility model is:
Select the ZSM-5 commodity molecular screen primary powder (the silica alumina ratio scope is 20-500) of Different Silicon aluminum ratio.Earlier ZSM-5 molecular screen primary powder machine-shaping to particle diameter is respectively the granule of different-grain diameters such as 20/40 order, 40/60 order, 60/80 order, 80/100 order, 100/120 order, subsequent use as filler.
ZSM-5 sieve particle after sieving is taken by weighing 100mg～500mg.In not filling the inert coatings stainless-steel tube/glass tube 1 of adsorbent, from left to right insert glass wool/stainless steel mesh 2, poly tetrafluoroethylene 3, ZSM-5 molecular sieve filling 4, poly tetrafluoroethylene 3, glass wool/stainless steel mesh 2 successively.
The application process technical scheme of the utility model is:
The first step is used the sampling of ZSM-5 molecular sieve adsorption pipe.
Before the use, ZSM-5 molecular sieve adsorption pipe need be at 300-350 ℃ of down aging 10-15min, to remove the impurity that the ZSM-5 molecular screen primary powder adsorbs in air.
The ZSM-5 molecular sieve adsorption pipe of using after wearing out is sampled to samples such as air, materials, absorption and enrichment micromolecule benzene series thing wherein.
Second step, gas chromatograph or gas chromatograph-mass spectrometer (GCMS) test.
ZSM-5 adsorption tube after the sampling is put into pyrolysis analyse appearance and heat, the benzene series thing that desorption is come out is enriched in pyrolysis and analyses cold-trap, moment the heat cold-trap, use gas chromatography or gas chromatograph-mass spectrometer and detect.
The gas chromatographic detection condition is: hydrogen ion flame detector, capillary chromatographic column, constant temperature or temperature programme.
The gas chromatography-mass spectrography testing conditions is: electron impact ionization source, capillary chromatographic column, constant temperature or temperature programme.
The beneficial effect of the utility model is:
The utility model can adsorb from polymorphic type samples such as environment, material and enrichment micromolecule benzene series thing by highly selective, analyses appearance-gas chromatograph or pyrolysis through pyrolysis and analyses appearance-gas chromatograph-mass spectrometer (GCMS) content of benzene series thing in the working sample more accurately.Through selecting Tenax adsorption tube and ZSM-5 adsorption tube respectively for use sherwood oil and benzene series thing biased sample contrast test are found; ZSM-5 molecular sieve adsorption pipe is stronger to the selectivity of benzene series thing; The long-pending normalizing number percent of benzene series object plane accounts for 62.2%, and the long-pending normalizing number percent of benzene series object plane accounts for 46.4% in the Tenax adsorption tube.
Description of drawings
Fig. 1 is a ZSM-5 molecular sieve adsorption tubular construction synoptic diagram.Wherein, stainless-steel tube 1, stainless steel mesh 2, poly tetrafluoroethylene 3, ZSM-5 sieve particle 4.
Fig. 2 is the ZSM-5 molecular sieve adsorption tubular construction synoptic diagram of Different Silicon aluminum ratio, wherein, and stainless-steel tube 1; Stainless steel mesh 2, poly tetrafluoroethylene 3, the ZSM-5 sieve particle 5 of silica alumina ratio 50; The ZSM-5 sieve particle 6 of silica alumina ratio 100, the ZSM-5 sieve particle 7 of silica alumina ratio 500.
Fig. 3 is the ZSM-5 molecular sieve adsorption tubular construction synoptic diagram of different-grain diameter, wherein, and stainless-steel tube 1; Stainless steel mesh 2, poly tetrafluoroethylene 3,60/80 purpose ZSM-5 sieve particles 8; 80/100 purpose ZSM-5 sieve particle, 9,100/120 purpose ZSM-5 sieve particles 10.
Fig. 4 is the benzene series thing hybrid standard article TIC that obtains among the embodiment 1, wherein, and 11-benzene; 12-toluene; 13-ethylbenzene; The 14-P-xylene.
Fig. 5 is the ZSM-5 adsorption tube obtains among the embodiment 1 the sherwood oil and the TIC of benzene series thing biased sample.
Fig. 6 is commodity Tenax adsorption tube obtains in the Comparative Examples 1 the sherwood oil and the TIC of benzene series thing biased sample.
Embodiment
(1) preparation of ZSM-5 adsorption tube
(1) ZSM-5 molecular screen primary powder (silica alumina ratio 50) machine-shaping to 60/80 purpose granule is subsequent use as filler;
(2) sieve particle in the step (1) is taken by weighing 250mg, insert adsorption tube.The utility model adsorption tube is used UNITY thermal desorption appearance, and the external diameter 6.4mm of system compatible industrial standard, long 89mm do not fill the inert coatings stainless-steel tube of adsorbent.The preparation process is: at the external diameter 6.4mm of industrial standard; Long 89mm does not fill in the inert coatings stainless-steel tube 1 of adsorbent, from left to right inserts stainless steel mesh 2, poly tetrafluoroethylene 3, above-mentioned load weighted ZSM-5 molecular sieve filling 4, poly tetrafluoroethylene 3, stainless steel mesh 2 successively.
This loads good adsorption tube structure shown in accompanying drawing 1
(3) before the use, ZSM-5 molecular sieve adsorption pipe is at 325 ℃ of down aging 15min, to remove the impurity that the ZSM-5 molecular screen primary powder adsorbs in air.
(2) the application process technical scheme of the utility model
(1) uses methyl alcohol preparation benzene, toluene, ethylbenzene, xylene concentration to be the hybrid standard article solution of 100mg/L, get 1 μ L, under the helium air-flow, be blown into adsorption tube with micro syringe.
(2) use pyrolysis to analyse appearance-gas chromatograph or appearance-gas chromatograph-mass spectrometer (GCMS) test benzene series thing standard items are analysed in pyrolysis.Accompanying drawing 4 is benzene series thing standard items gas chromatography mass spectrometry TIC in the step for this reason.
(3) use sherwood oil and benzene series thing preparation biased sample, get 1uL, under the helium air-flow, be blown into commodity Tenax adsorption tube with micro syringe
(4) use pyrolysis to analyse appearance-gas chromatograph or appearance-gas chromatograph-mass spectrometer (GCMS) test benzene series thing standard items are analysed in pyrolysis.Accompanying drawing 5 is the ZSM-5 adsorption tube obtains in this step the sherwood oil and the TIC of benzene series thing biased sample.In this step, the long-pending normalizing number percent of benzene series object plane accounts for 62.2%.
In the present embodiment, main detected parameters is following:
Instrument: appearance is analysed in the pyrolysis of Britain Marks company, the U.S. 7890A-5975C of Agilent company gas chromatograph-mass spectrometer.
Condition is analysed in pyrolysis: 90 ℃ of desorption temperatures, desorption time 5min, 200 ℃ of transmission line temperature, condenser temperature-25 ℃, 280 ℃ of parsings.
GC conditions: chromatographic column HP-5MS (30m * 0.25mm * 0.25 μ m), temperature programme, 35 ℃ keep 5min, and 5 ℃/min rises to 200 ℃, keeps 5min.200 ℃ of transmission line temperature.Carrier gas He, flow velocity 1.0mL/min.
Mass spectrum condition: electron impact ionization source, electron energy 70eV, 230 ℃ of source temperature, full scan drainage pattern, mass range 40～500amu.
Embodiment 2
(1) preparation of ZSM-5 adsorption tube
(1) ZSM-5 molecular screen primary powder (silica alumina ratio 500) machine-shaping is subsequent use as filler to 80-100 purpose granule;
(2) sieve particle in the step (1) is taken by weighing 500mg, insert adsorption tube.The utility model adsorption tube is used UNITY thermal desorption appearance, and the external diameter 6.4mm of system compatible industrial standard, long 89mm do not fill the inert coatings stainless-steel tube of adsorbent.The preparation process is: at the external diameter 6.4mm of industrial standard; Long 89mm does not fill in the inert coatings stainless-steel tube 1 of adsorbent, from left to right inserts stainless steel mesh 2, poly tetrafluoroethylene 3, above-mentioned load weighted ZSM-5 molecular sieve filling 4, poly tetrafluoroethylene 3, stainless steel mesh 2 successively.
This adsorption tube structure is shown in accompanying drawing 1
(3) before the use, ZSM-5 molecular sieve adsorption pipe is at 350 ℃ of down aging 15min, to remove the impurity that the ZSM-5 molecular screen primary powder adsorbs in air.
(2) the application process technical scheme of the utility model
(1) uses methyl alcohol preparation benzene, toluene, ethylbenzene, xylene concentration to be the hybrid standard article solution of 100mg/L, get 1uL, under the helium air-flow, be blown into adsorption tube with micro syringe.
(2) use pyrolysis to analyse appearance-gas chromatograph or appearance-gas chromatograph-mass spectrometer (GCMS) test is analysed in pyrolysis.
In the present embodiment, main detected parameters is following:
Instrument: appearance is analysed in the pyrolysis of Britain Marks company, the U.S. 7890A-5975C of Agilent company gas chromatograph-mass spectrometer.
Condition is analysed in pyrolysis: 90 ℃ of desorption temperatures, desorption time 5min, 200 ℃ of transmission line temperature, condenser temperature-25 ℃, 280 ℃ of parsings.
GC conditions: chromatographic column HP-5MS (30m * 0.25mm * 0.25 μ m), temperature programme, 35 ℃ keep 5min, and 5 ℃/min rises to 200 ℃, keeps 5min.200 ℃ of transmission line temperature.Carrier gas He, flow velocity 1.0mL/min.
Mass spectrum condition: electron impact ionization source, electron energy 70eV, 230 ℃ of source temperature, full scan drainage pattern, mass range 40～500amu.
Embodiment 3
(1) preparation of ZSM-5 adsorption tube
(1) be that 50 ZSM-5 molecular screen primary powder 5, silica alumina ratio are that 100 ZSM-5 molecular screen primary powder 6, silica alumina ratio are that machine-shaping to 60-80 purpose granules are subsequent use as filler respectively for 500 ZSM-5 molecular screen primary powder 7 with silica alumina ratio;
(2) 50,100,500 sieve particles of the silica alumina ratio in the step (1) are taken by weighing 100mg respectively, insert adsorption tube successively.The utility model adsorption tube is used UNITY thermal desorption appearance, and the external diameter 6.4mm of system compatible industrial standard, long 89mm do not fill the inert coatings stainless-steel tube of adsorbent.The preparation process is: at the external diameter 6.4mm of industrial standard; Long 89mm does not fill in the inert coatings stainless-steel tube 1 of adsorbent, from left to right inserts ZSM-5 molecular sieve filling 5, the ZSM-5 molecular sieve filling 6 of silica alumina ratio 100, the ZSM-5 molecular sieve filling 7 of silica alumina ratio 500, poly tetrafluoroethylene 3, the stainless steel mesh 2 of stainless steel mesh 2, poly tetrafluoroethylene 3, above-mentioned load weighted silica alumina ratio 50 successively.
This loads good adsorption tube structure shown in accompanying drawing 2.
(3) before the use, ZSM-5 molecular sieve adsorption pipe is at 350 ℃ of down aging 15min, to remove the impurity that the ZSM-5 molecular screen primary powder adsorbs in air.
(2) the application process technical scheme of the utility model
(1) uses methyl alcohol preparation benzene, toluene, ethylbenzene, xylene concentration to be the hybrid standard article solution of 100mg/L, get 1uL, under the helium air-flow, be blown into adsorption tube with micro syringe.
(2) use pyrolysis to analyse appearance-gas chromatograph or appearance-gas chromatograph-mass spectrometer (GCMS) test is analysed in pyrolysis.
In the present embodiment, main detected parameters is following:
Instrument: appearance is analysed in the pyrolysis of Britain Marks company, the U.S. 7890A-5975C of Agilent company gas chromatograph-mass spectrometer.
Condition is analysed in pyrolysis: 90 ℃ of desorption temperatures, desorption time 5min, 200 ℃ of transmission line temperature, condenser temperature-25 ℃, 280 ℃ of parsings.
GC conditions: chromatographic column HP-5MS (30m * 0.25mm * 0.25 μ m), temperature programme, 35 ℃ keep 5min, and 5 ℃/min rises to 200 ℃, keeps 5min.200 ℃ of transmission line temperature.Carrier gas He, flow velocity 1.0mL/min.
Mass spectrum condition: electron impact ionization source, electron energy 70eV, 230 ℃ of source temperature, full scan drainage pattern, mass range 40～500amu.
(1) preparation of ZSM-5 adsorption tube
(1) ZSM-5 molecular screen primary powder difference machine-shaping to 60/80 order, 80/100 order, the 100/120 purpose granule of silica alumina ratio 50 is subsequent use as filler;
(2) 60/80 order sieve particle, 8,80/100 order sieve particle, 9, the 100/120 order sieve particle 10 in the step (1) is taken by weighing 100mg respectively, insert adsorption tube successively.The utility model adsorption tube is used UNITY thermal desorption appearance, and the external diameter 6.4mm of system compatible industrial standard, long 89mm do not fill the inert coatings stainless-steel tube of adsorbent.The preparation process is: at the external diameter 6.4mm of industrial standard; Long 89mm does not fill in the inert coatings stainless-steel tube 1 of adsorbent, from left to right inserts stainless steel mesh 2, poly tetrafluoroethylene 3, above-mentioned load weighted 60/80 purpose ZSM-5 molecular sieve filling, 8,80/100 purpose ZSM-5 molecular sieve filling, 9,100/120 purpose ZSM-5 molecular sieve filling 10, poly tetrafluoroethylene 3, rust steel screen cloth 2 successively.
This loads good adsorption tube structure shown in accompanying drawing 3.
(3) before the use, ZSM-5 molecular sieve adsorption pipe is at 350 ℃ of down aging 15min, to remove the impurity that the ZSM-5 molecular screen primary powder adsorbs in air.
(2) the application process technical scheme of the utility model
(1) uses methyl alcohol preparation benzene, toluene, ethylbenzene, xylene concentration to be the hybrid standard article solution of 100mg/L, get 1uL, under the helium air-flow, be blown into adsorption tube with micro syringe.
(2) use pyrolysis to analyse appearance-gas chromatograph or appearance-gas chromatograph-mass spectrometer (GCMS) test is analysed in pyrolysis.
In the present embodiment, main detected parameters is following:
Instrument: appearance is analysed in the pyrolysis of Britain Marks company, the U.S. 7890A-5975C of Agilent company gas chromatograph-mass spectrometer.
Condition is analysed in pyrolysis: 90 ℃ of desorption temperatures, desorption time 5min, 200 ℃ of transmission line temperature, condenser temperature-25 ℃, 280 ℃ of parsings.
GC conditions: chromatographic column HP-5MS (30m * 0.25mm * 0.25 μ m), temperature programme, 35 ℃ keep 5min, and 5 ℃/min rises to 200 ℃, keeps 5min.200 ℃ of transmission line temperature.Carrier gas He, flow velocity 1.0mL/min.
Mass spectrum condition: electron impact ionization source, electron energy 70eV, 230 ℃ of source temperature, full scan drainage pattern, mass range 40～500amu.
Comparative Examples 1
(1) with using sherwood oil and benzene series thing preparation biased sample among the embodiment 1, gets 1uL, under the helium air-flow, be blown into commodity Tenax adsorption tube with micro syringe.
(2) use pyrolysis to analyse appearance-gas chromatograph or the biased sample in appearance-gas chromatograph-mass spectrometer (GCMS) test commodity Tenax adsorption tube is analysed in pyrolysis.
(3) use pyrolysis to analyse appearance-gas chromatograph or appearance-gas chromatograph-mass spectrometer (GCMS) test benzene series thing standard items are analysed in pyrolysis.Accompanying drawing 6 is the Tenax adsorption tube obtains in this step the sherwood oil and the TIC of benzene series thing biased sample.In this step, the long-pending normalizing number percent of benzene series object plane accounts for 46.4%.
Claims (5)
1. one kind is the adsorption tube of filler with the molecular sieve; Comprise absorption body and filler; The absorption body is stainless-steel tube/glass tube (1) that surfaces coated is covered with inert coatings; Absorption body inner stuffing is glass wool/stainless steel mesh (2), poly tetrafluoroethylene (3) and adsorbent; It is characterized in that the material of filling in stainless-steel tube/glass tube (1) from left to right is followed successively by glass wool/stainless steel mesh (2), poly tetrafluoroethylene (3), ZSM-5 molecular sieve filling (4), poly tetrafluoroethylene (3), glass wool/stainless steel mesh (2), the ZSM-5 molecular sieve filling is the adsorbent filler.
2. adsorption tube according to claim 1, the addition that it is characterized in that ZSM-5 molecular sieve filling (4) in the adsorption tube is 100mg～500mg.
3. adsorption tube according to claim 1, the silica alumina ratio that it is characterized in that the ZSM-5 molecular sieve can be selected any one or the multiple combination in 50,100,200,300,400,500.
4. adsorption tube according to claim 1, the particle diameter that it is characterized in that the ZSM-5 molecular sieve can be selected any one or the multiple combination in 20/40 order, 40/60 order, 60/80 order, 80/100 order, 100/120 order.
5. adsorption tube according to claim 1 is characterized in that silica alumina ratio is 50, and particle diameter is that 60/80 purpose ZSM-5 molecular sieve is as the adsorbent filler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202527393U CN202281715U (en) | 2011-07-18 | 2011-07-18 | Adsorption tube taking molecular sieve as filler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202527393U CN202281715U (en) | 2011-07-18 | 2011-07-18 | Adsorption tube taking molecular sieve as filler |
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| CN103115992A (en) * | 2013-03-05 | 2013-05-22 | 中国烟草总公司郑州烟草研究院 | Adsorption trap filling method based on hot-wire type Curie point pyrolyzer |
| CN103969093A (en) * | 2014-05-08 | 2014-08-06 | 李海涛 | Gas adsorption sampling device |
| CN104297362A (en) * | 2014-09-05 | 2015-01-21 | 国家电网公司 | Adsorbent tube for determining content of organic gases and steam in air, and its making method |
| CN104459053A (en) * | 2014-12-10 | 2015-03-25 | 中国科学院苏州生物医学工程技术研究所 | Gas sampling device as well as gas path system and method adopting same |
| CN106796217A (en) * | 2014-07-21 | 2017-05-31 | 泰克年研究发展基金会公司 | For the composition of directly breathing sampling |
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| CN107843463A (en) * | 2017-10-27 | 2018-03-27 | 中国科学院生态环境研究中心 | Persistence organic pollutant actively samples sleeve in air |
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- 2011-07-18 CN CN2011202527393U patent/CN202281715U/en not_active Expired - Lifetime
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| CN103115992A (en) * | 2013-03-05 | 2013-05-22 | 中国烟草总公司郑州烟草研究院 | Adsorption trap filling method based on hot-wire type Curie point pyrolyzer |
| CN103969093A (en) * | 2014-05-08 | 2014-08-06 | 李海涛 | Gas adsorption sampling device |
| CN106796217A (en) * | 2014-07-21 | 2017-05-31 | 泰克年研究发展基金会公司 | For the composition of directly breathing sampling |
| CN104297362A (en) * | 2014-09-05 | 2015-01-21 | 国家电网公司 | Adsorbent tube for determining content of organic gases and steam in air, and its making method |
| CN104297362B (en) * | 2014-09-05 | 2016-05-04 | 国家电网公司 | Sorbent tubes of organic gas and steam content and preparation method thereof in mensuration air |
| CN104459053A (en) * | 2014-12-10 | 2015-03-25 | 中国科学院苏州生物医学工程技术研究所 | Gas sampling device as well as gas path system and method adopting same |
| CN107588995A (en) * | 2016-07-06 | 2018-01-16 | 中国石油化工股份有限公司 | A kind of adsorption equilibrium tank and its application |
| CN107843463A (en) * | 2017-10-27 | 2018-03-27 | 中国科学院生态环境研究中心 | Persistence organic pollutant actively samples sleeve in air |
| CN109870341A (en) * | 2017-12-01 | 2019-06-11 | 中国科学院大连化学物理研究所 | Volatile organic matter original position cold-trap enrichment-Thermal desorption sample pretreatment device |
| CN107983086A (en) * | 2017-12-11 | 2018-05-04 | 昆山锦程气体设备有限公司 | A kind of industrial oxygenerating machine adsorbing tower with molecular sieve |
| CN108844788A (en) * | 2018-05-31 | 2018-11-20 | 上海化工研究院有限公司 | A kind of simultaneous organic volatile circulating sampling device of in-vehicle air purification |
| CN108844788B (en) * | 2018-05-31 | 2021-06-08 | 上海化工研究院有限公司 | Air purification has quick-witted volatile substance circulation sampling device concurrently in car |
| CN109632402A (en) * | 2019-01-23 | 2019-04-16 | 大连理工大学 | A kind of novel thermal desorption adsorption tube |
| CN113521957A (en) * | 2021-07-19 | 2021-10-22 | 华电智控（北京）技术有限公司 | Filling method and filling device for VOCs-enriched adsorption tube |
| CN113521957B (en) * | 2021-07-19 | 2023-02-28 | 华电智控（北京）技术有限公司 | Filling method and filling device for VOCs-enriched adsorption tube |
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