CN101797463B - Gas sampling enrichment device based on nano-fibers and enrichment method thereof - Google Patents

Gas sampling enrichment device based on nano-fibers and enrichment method thereof Download PDF

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Publication number
CN101797463B
CN101797463B CN 201010127503 CN201010127503A CN101797463B CN 101797463 B CN101797463 B CN 101797463B CN 201010127503 CN201010127503 CN 201010127503 CN 201010127503 A CN201010127503 A CN 201010127503A CN 101797463 B CN101797463 B CN 101797463B
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gas
enrichment
gas sampling
nanofiber
enriching apparatus
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CN101797463A (en
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康韬
曲子健
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XW NANO TECHNOLOGY Co Ltd
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XW NANO TECHNOLOGY Co Ltd
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Abstract

The invention discloses a gas sampling enrichment device based on nano-fibers, comprising a gas sampling device (1) and a gas enrichment device (2) and characterized in that the gas enrichment device (2) is in control communication with the gas sampling device (1), and the nano-fibers (21) in which gas components are enriched are arranged in the gas enrichment device (2). The device can accurately fix the collection quantity of gas to enable a detection result to be more reliable, can reduce the collection quantity of the gas, in particular gas with less content, can save the time, the labor and the cost and does not need any power system.

Description

Gas sampling enrichment device and enrichment method thereof based on nanofiber
Technical field
The invention belongs to the gas analysis technology field, be specifically related to a kind of sampling enrichment method, particularly relate to a kind of based on trace materials enrichment pre-treating method and device in the gaseous sample of functional nano-fiber based on functional nano-fiber.
Background technology
The trace gas material is collected with the life that detects with human closely bound up in the environment.On the one hand, it is low but endanger huge toxic and harmful particularly may to exist concentration in the air in the special occupation environment, needs detection level to reach the Environmental security national standard; On the other hand, the light concentration gas analysis also has demand in human being's production, life, in the gas of breathing out in the human body mouth, exist some specific gas relevant with human diseases, and quantitative analysis detects the quantizating index that can be used as medical diagnosis on disease, treatment.These trace materials generally in sample content be less than 0.01%, if its content is lower than the mensuration lower limit of analytical method, just must adopt the way of preenrichment, from a large amount of parent materials, collect trace element to a smaller volume that desire is measured, thereby improve its content to measuring more than the lower limit, this analytical method is called the trace enrichment.
But, existing collection and enrichment method for these gases, complex operation, required time is long, and it is high to detect cost.Simultaneously, because its content is low, disturb greatly detection difficult.For example, for the detection of benzene content in the room air, the method for now generally using is the activated adoption method, but the reagent that uses in the operating process is unfavorable for that the reviewer is healthy and experiment link is many, influences final detection result.And for example, can only lean on expensive gas chromatograph-mass spectrometer (GC-MS) to detect now, analysis cost height, unsuitable practice for the detection of isoprene in the relevant human body breath of mental illness.
The concentration of various micro-trace gas detects in the environment, at first will sample the whether accurate credibility that just is directly connected to testing result of the volume of sampling, secondly, because the gas content rareness wants to gather enough samples, just must prolong the sampling time.Time is long more, and the error of sampling volume is big more.The present invention comes therefrom.
Summary of the invention
Problems such as the object of the invention is to provide a kind of gas sampling enrichment device based on nanofiber absorption, and it is inaccurate to have solved in the prior art the existing sampling volume of enrichment method, and the sampling time is long, bioaccumulation efficiency is low.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of gas sampling enrichment device based on nanofiber, comprise gas sampling assembly and gas enriching apparatus, it is characterized in that described gas enriching apparatus is communicated with gas sampling assembly control, is provided with the nanofiber of enriched gas composition in the described gas enriching apparatus.
Preferably, described enrichment sampler comprises two gas sampling assemblies, and the gas enriching apparatus that is communicated with gas sampling assembly control is set between described gas sampling assembly.
Preferably, described gas sampling assembly comprises the gas bomb of stored-gas, and described gas bomb bottom end opening is communicated with the control of gas enriching apparatus, and the piston that driving gas flows from the gas bomb bottom end opening is set in the described gas bomb.
Preferably, described gas enriching apparatus comprises enrichment pipe, in the described enrichment pipe nanofiber is set, and described enrichment pipe is connected with gas sampling assembly by tube connector.
Preferably, described enrichment pipe is connected with the gas bomb pipeline of gas sampling assembly by tube connector, and the valve that control is communicated with is set on the pipeline.
Preferably, described tube connector is a rubber hose, and described enrichment pipe two ends are provided with the fixedly valve protection cap of rubber hose, and the netted O-ring seal that supplied gas is passed through is set in the described valve protection cap, in the enrichment pipe nanofiber is set between described netted O-ring seal.
Preferably, described valve protection cap is fixed on the enrichment pipe two ends, the sealing that is connected of the circumferentially outstanding flange that forms of described valve protection cap, described flange and tube connector.
Preferably, described enrichment pipe is a glass tube.
Another object of the present invention is to provide a kind of sampling enrichment method, it is characterized in that said method comprising the steps of based on nanofiber:
(1) utilize gas sampling assembly to carry out the collection of gas;
(2) to being collected in the gas componant enrichment in having the gas enriching apparatus of nanofiber in the gas sampling assembly.
Preferably, adopt gas enriching apparatus two ends to connect gas sampling assembly respectively in the described method step (2), carry out enrichment by the piston motion driving gas circulation of gas sampling assembly through the gas enriching apparatus and handle.
The gas sampling enrichment device that the present invention is based on nanofiber absorption comprises gas piston sampling apparatus and gas enriching apparatus two parts, the gas sampling assembly main body is made by inert materials such as glass and is connected piston apparatus, bottom one side is provided with gas inlet and outlet, imports and exports by Air Valve Control.Gas adsorbing device is the tubular structure of inert material such as glass, and hollow can be put into nanofiber inside, and the plug that make with the inertia macromolecular material respectively at two ends, liner sealed air cushion are as supporter, and the nut bottom is a network structure.
Operation principle of the present invention is in the sampling location gas to be carried out active or passive collection with gas sampling assembly, screws airtight folder after the collection, uses as storage device.When waiting to need to detect, connect adsorbent equipment and sampler injection port, make the gas of collection all pass through adsorbent equipment, another side is provided with the gas sampling assembly of same sky, can make the gas of collection pass through enriching apparatus repeatedly by artificial outer piston of defeating one side gathering-device, improve adsorption efficiency.
With respect to scheme of the prior art, advantage of the present invention is:
1. nanofiber is set in the technical solution of the present invention carries out trace materials in the enriched gas, characteristics such as highly porous, interconnecting property, the hole of nanofiber is little, high-specific surface area help the enrichment of biomolecule, trace element and some other materials, thereby improve detection sensitivity.
2, in the optimal technical scheme of the present invention by gas sampling assembly and gas enriching apparatus are set, back and forth flow back and forth at the gas enriching apparatus by turn round the back and forth gas that makes collection of gas sampling assembly, can carry out the collection capacity of gas accurately quantitatively, make testing result more credible, owing to contain enriching apparatus in this covering device, can reduce the collection capacity of gas like this, especially at the gas of content rareness, it is time saving and energy saving to accomplish, simultaneously, this covering device without any need for dynamical system, save cost.
In sum, the gas sampling enrichment device that the present invention is based on nanofiber absorption can form the array solid-phase extraction device, shortcomings such as it is inaccurate to have overcome in the prior art existing sampling volume, and the sampling time is long, bioaccumulation efficiency is low, and simple in structure, easy to install, save manpower.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the structural representation of the embodiment of the invention based on the gas sampling enrichment device of nanofiber absorption;
Fig. 2 is the A place enlarged drawing of Fig. 1;
Fig. 3 is the blast structural representation of embodiment of the invention gas enriching apparatus;
Fig. 4 is the valve protection cap structural representation of embodiment of the invention gas enriching apparatus.
Wherein: 1 is gas sampling assembly, and 2 is the gas enriching apparatus, and 3 is valve; 11 is gas bomb, and 12 is piston, and 21 is nanofiber, and 22 is enrichment pipe; 23 is tube connector, and 24 is valve protection cap; 25 is netted O-ring seal, and 26 is flange.
The specific embodiment
Below in conjunction with specific embodiment such scheme is described further.Should be understood that these embodiment are used to the present invention is described and are not limited to limit the scope of the invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment is shown in Fig. 1~4, should be based on the gas sampling enrichment device of nanofiber, comprise two gas sampling assemblies 1 and gas enriching apparatus 2, the gas enriching apparatus 2 that is communicated with gas sampling assembly control is set between described gas sampling assembly, the nanofiber 21 of enriched gas composition is set in the described gas enriching apparatus 2.
Gas sampling assembly 1 comprises the gas bomb 11 of stored-gas, and described gas bomb bottom end opening is communicated with the control of gas enriching apparatus, and the piston 12 that driving gas flows from the gas bomb bottom end opening is set in the described gas bomb.
The gas enriching apparatus comprises enrichment pipe 22, and nanofiber 21 is set in the described enrichment pipe, and described enrichment pipe is connected with gas sampling assembly by tube connector 23.Described enrichment pipe is connected with the gas bomb pipeline of gas sampling assembly by tube connector, and the valve 3 that control is communicated with is set on the pipeline.Described tube connector is a rubber hose, and described enrichment pipe two ends are provided with the fixedly valve protection cap 24 of rubber hose, and the netted O-ring seal 25 that supplied gas is passed through is set in the described valve protection cap, in the enrichment pipe nanofiber are set between described netted O-ring seal.Described valve protection cap is fixed on the enrichment pipe two ends, the sealing that is connected of the circumferentially outstanding flange 26 that forms of described valve protection cap, described flange and tube connector.Described enrichment pipe is a glass tube.
The outlet of one supplied gas turnover is arranged at the gas sampling assembly bottom, and the exit uses valve as gauge tap.Opening part can be connected with enriching apparatus.The gas enriching apparatus is a middle tube of inserting nanofiber, and two ends connect in the bayonet socket mode with the plug that can ventilate respectively.The gas collecting part of device all can be used separately with enriching section, both can form enriching apparatus after connecting with conduit.All connect gathering-device in the enriching apparatus both sides, wherein a side has collected gas, and opposite side does not have gas, and purpose is to make the gas that has collected can pass through enriching apparatus repeatedly, improves bioaccumulation efficiency.
During use, carry out the collection of gas with gas sampling assembly earlier; To being collected in the gas componant enrichment in having the gas enriching apparatus of nanofiber in the gas sampling assembly.Gas enriching apparatus two ends connect gas sampling assembly respectively, carry out enrichment by the piston motion driving gas circulation of gas sampling assembly through the gas enriching apparatus and handle.
Be example with the benzene in air assay below, the performance of this cover sampling enriching apparatus be described:
In gaseous environment to be measured, extract a certain amount of gas 1L with gathering-device, connect enriching apparatus.Make gas pass through enriching apparatus 5 times repeatedly.Inject the enrichment pipe wash-out with an amount of methyl alcohol (as 100 μ L) and be adsorbed on object on the fiber, eluent is collected in the small test tube, directly gets the analysis of an amount of eluent inject gas chromatograph.Object is by pillar 5 times the time, and its rich efficient can reach more than 90%.Whole process operation simply, quantitatively accurate, quick, laborsaving.
Above-mentioned example only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All spirit essence is done according to the present invention equivalent transformation or modification all should be encompassed within protection scope of the present invention.

Claims (8)

1. gas sampling enrichment device based on nanofiber, comprise gas sampling assembly (1) and gas enriching apparatus (2), it is characterized in that described gas enriching apparatus (2) is communicated with gas sampling assembly (1) control, is provided with the nanofiber (21) of enriched gas composition in the described gas enriching apparatus (2); Described gas sampling enrichment device comprises two gas sampling assemblies (1), and the gas enriching apparatus (2) that is communicated with gas sampling assembly control is set between described gas sampling assembly; Described gas enriching apparatus comprises enrichment pipe (22), and nanofiber (21) is set in the described enrichment pipe, and described enrichment pipe is connected with gas sampling assembly by tube connector (23).
2. the gas sampling enrichment device based on nanofiber according to claim 1, it is characterized in that described gas sampling assembly (1) comprises the gas bomb (11) of stored-gas, described gas bomb bottom end opening is communicated with the control of gas enriching apparatus, and the piston (12) that driving gas flows from the gas bomb bottom end opening is set in the described gas bomb.
3. the gas sampling enrichment device based on nanofiber according to claim 1 is characterized in that described enrichment pipe is connected with the gas bomb pipeline of gas sampling assembly by tube connector, and the valve (3) that control is communicated with is set on the pipeline.
4. the gas sampling enrichment device based on nanofiber according to claim 1, it is characterized in that described tube connector is a rubber hose, described enrichment pipe two ends are provided with the fixedly valve protection cap of rubber hose (24), the netted O-ring seal (25) that supplied gas is passed through is set in the described valve protection cap, in the enrichment pipe nanofiber is set between described netted O-ring seal.
5. the gas sampling enrichment device based on nanofiber according to claim 4 is characterized in that described valve protection cap is fixed on the enrichment pipe two ends, the sealing that is connected of the circumferentially outstanding flange (26) that forms of described valve protection cap, described flange and tube connector.
6. the gas sampling enrichment device based on nanofiber according to claim 1 is characterized in that described enrichment pipe is a glass tube.
7. one kind is adopted the sample method of enrichment of any gas sampling enrichment device of claim 1~6, it is characterized in that said method comprising the steps of:
(1) utilize described gas sampling assembly to carry out the collection of gas;
(2) to being collected in the gas componant enrichment in having the gas enriching apparatus of nanofiber in the gas sampling assembly.
8. method according to claim 7 is characterized in that gas enriching apparatus two ends connect gas sampling assembly respectively in the described method step (2), carries out enrichment by the piston motion driving gas circulation of gas sampling assembly through the gas enriching apparatus and handles.
CN 201010127503 2010-03-16 2010-03-16 Gas sampling enrichment device based on nano-fibers and enrichment method thereof Active CN101797463B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103048170B (en) * 2013-01-18 2015-07-08 东南大学 Gas sampling and enrichment device based on nanomaterials
CN109425711A (en) * 2017-09-05 2019-03-05 中国石油化工股份有限公司 A kind of detection device and system of gas content

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2881592Y (en) * 2005-12-22 2007-03-21 北京市劳动保护科学研究所 Sample collecting and feeding device of portable gas chromatograph
CN201331439Y (en) * 2008-11-11 2009-10-21 延边大学 Gas-liquid atmospheric sampling device
CN201732022U (en) * 2010-03-16 2011-02-02 苏州先伟纳米技术有限公司 Gas sampling enrichment device based on nanometer fibers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2881592Y (en) * 2005-12-22 2007-03-21 北京市劳动保护科学研究所 Sample collecting and feeding device of portable gas chromatograph
CN201331439Y (en) * 2008-11-11 2009-10-21 延边大学 Gas-liquid atmospheric sampling device
CN201732022U (en) * 2010-03-16 2011-02-02 苏州先伟纳米技术有限公司 Gas sampling enrichment device based on nanometer fibers

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