CN104458354A - Volatile organic gas diffusion sampling tube - Google Patents
Volatile organic gas diffusion sampling tube Download PDFInfo
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- CN104458354A CN104458354A CN201410823713.8A CN201410823713A CN104458354A CN 104458354 A CN104458354 A CN 104458354A CN 201410823713 A CN201410823713 A CN 201410823713A CN 104458354 A CN104458354 A CN 104458354A
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- volatile organic
- organic gas
- anemostat
- tube
- sampling pipe
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Abstract
The invention discloses a volatile organic gas diffusion sampling tube. The volatile organic gas diffusion sampling tube is characterized by comprising a diffusion tube with a micropore structure, wherein an adsorbent is filled in the diffusion tube; baffle blocks for fixing filler in the tube are respectively arranged at the two sides in the diffusion tube; and end openings in the two ends of the diffusion tube are respectively covered by tube caps. Compared with the drive type sampler, power supply and gas exhausting device are not needed, so that the volatile organic gas diffusion sampling tube is small in size, light in weight, simple to operate, convenient to carry, safe, suitable for various environments, and especially suitable for time weighted average concentration detection of personal exposure dose in environmental health and occupational health as well as sampling in a flammable and combustible limited environment.
Description
Technical field
The present invention relates to a kind of gas sampling assembly, belong to the unpowered diffused sampling pipe that in occupational health, field of environment protection and room air, volatile organic contaminant detects.
Background technology
Diffused Passive sampler can be widely used in ambient atmosphere, occupational health the absorption trapping of the various organic contaminants such as benzene, toluene, normal hexane, formaldehyde in workplace air.Present stage; environment protection and monitoring mechanism, scientific research institutions, occupational health, large chemical complex etc. are large to the demand of diffused sampling thief; use amount is about 700,000/year, the domestic research and development at the type product, production is still in the blank stage, can only buys the home made article such as the U.S., Holland.
At present, sampling on the market for gas adopts active air sampler usually, active air sampling thief is by asepwirator pump, air-flow measurement device and time set, the air sample of certain volume is made at the uniform velocity to flow through adsorbent in sampling thief, gas pollutant is concentrated to be adsorbed in adsorbent, and reach the object of concentrated sampling, then be used in conjunction with the instrument such as gas chromatograph the gaseous contamination substrate concentration detected in detected surrounding air.Need by power supply and to bleed propulsion system, volume is large, troublesome poeration, carrying inconvenience.
Summary of the invention
The object of this invention is to provide a kind of volatile organic gas diffusive sampling pipe and stationary fixture thereof, compare with active sampling thief, without the need to any power supply and propulsion system of bleeding, and volume is little, lightweight, simple to operate, easy to carry.
The technical solution adopted for the present invention to solve the technical problems is: a kind of volatile organic gas diffusive sampling pipe, it is characterized in that: comprise the anemostat with microcellular structure, adsorbent is filled with in anemostat, both sides in anemostat are respectively equipped with the block for filler in stationary pipes, and the port at anemostat two ends covers with pipe cap respectively.
As preferably, described adsorbent is graininess carbon aerogels or cocos active carbon adsorbent medium.
Preferably, the granularity of the adsorbent loaded in described anemostat is 30-50 order.
Preferably, described anemostat is internal diameter is 2.95-3.05mm, external diameter is 5.90-6.05mm, length is the hollow tube of 49-50mm.
Preferably, described block is the stainless steel wire deactivated.
Preferably, described anemostat adopts high-temperature material extruding sinter molding to make.
Preferably, the outside of described anemostat is provided with thermal desorption stainless steel outer sleeve pipe.
The present invention compares with active sampling thief, without the need to any power supply and propulsion system of bleeding, volume is little, lightweight, simple to operate, easy to carry, essential safety, is applicable to various environment, is especially applicable to the sampling of time weighted average concentration detection of individual exposure dose in environmental health, occupational health and the sampling of inflammable and explosive constrained environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of volatile organic gas diffusive sampling pipe.
Fig. 2 is the structure stretch-out view of volatile organic gas diffusive sampling pipe.
Fig. 3 is the volatile organic gas diffusive sampling pipe schematic diagram of band outer tube.
1. anemostats, 2. adsorbent, 3. block, 4. pipe cap, 5. outer tube in figure.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.Should be appreciated that embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
As shown in Figure 1-2, a kind of volatile organic gas diffusive sampling of the present invention pipe, comprise the anemostat 1 with microcellular structure, anemostat 1 adopts high-temperature material to extrude sinter molding and makes, adsorbent 2 is filled with in anemostat 1, adsorbent 2 adopts granularity to be 30-50 object graininess carbon aerogels or cocos active carbon adsorbent medium, both sides in anemostat 1 are respectively equipped with the block 3 for filler in stationary pipes, block 3 adopts the stainless steel wire deactivated, and the port at anemostat 1 two ends covers with pipe cap 4 respectively.
As preferably, anemostat 1 is internal diameter is 2.95-3.05mm, external diameter is 5.90-6.05mm, length is the hollow tube of 49-50mm.
As shown in Figure 3, thermal desorption stainless steel outer sleeve pipe 5 can be provided with in the outside of anemostat 1, anemostat 1 and the supporting conbined usage of outer tube 5, there is good impermeability and thermal conductivity, thermal desorption pre-treatment can be done, compared with existing domestic and international diffused sampling pipe, its concentration limit can reduce by 1000 times.
Volatility organic steam can follow fick law, by tube wall by diffusion in pipe extroversion pipe, and by granules in pipe shape adsorbent media adsorbs; After anemostat has adopted sample, adsorbing medium in pipe can be poured in 2ml sample injection bottle, to measure the various organic gass of absorption after the desorb of 1ml carbn disulfide, also anemostat can be placed in special supporting stainless steel hot desorb sleeve pipe, directly carry out thermal desorption injection and measure various organic gas.Anemostat is 0-85% in relative humidity, and temperature is 10-35 degree, wind speed is under the meteorological condition of 0.0010-10.0m/s, is 25-65ml/min to the sampling rate of organic gas various in air; In air, various organic vapor concentrations is under 0.10-3.0 times of occupational health exposure limit, can meet the continuous sampling requirement of 12h.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equal replacement and improvement etc., all should drop within protection scope of the present invention.
Claims (7)
1. a volatile organic gas diffusive sampling pipe, it is characterized in that: comprise the anemostat with microcellular structure, be filled with adsorbent in anemostat, the both sides in anemostat are respectively equipped with the block for filler in stationary pipes, and the port at anemostat two ends covers with pipe cap respectively.
2. volatile organic gas diffusive sampling pipe according to claim 1, is characterized in that: described adsorbent is graininess carbon aerogels or cocos active carbon adsorbent medium.
3. volatile organic gas diffusive sampling pipe according to claim 2, is characterized in that: the granularity of the adsorbent loaded in described anemostat is 30-50 order.
4. volatile organic gas diffusive sampling pipe according to claim 1, is characterized in that: described anemostat is internal diameter is 2.95-3.05mm, external diameter is 5.90-6.05mm, length is the hollow tube of 49-50mm.
5. volatile organic gas diffusive sampling pipe according to claim 1, is characterized in that: described block is the stainless steel wire deactivated.
6. volatile organic gas diffusive sampling pipe according to claim 4, is characterized in that: described anemostat adopts high-temperature material extruding sinter molding to make.
7. volatile organic gas diffusive sampling pipe according to claim 1, is characterized in that: the outside of described anemostat is provided with thermal desorption stainless steel outer sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410823713.8A CN104458354A (en) | 2014-12-26 | 2014-12-26 | Volatile organic gas diffusion sampling tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410823713.8A CN104458354A (en) | 2014-12-26 | 2014-12-26 | Volatile organic gas diffusion sampling tube |
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| Publication Number | Publication Date |
|---|---|
| CN104458354A true CN104458354A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410823713.8A Pending CN104458354A (en) | 2014-12-26 | 2014-12-26 | Volatile organic gas diffusion sampling tube |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181400A (en) * | 2015-05-29 | 2015-12-23 | 福建拓普检测技术有限公司 | Sampling device |
| CN105928834A (en) * | 2015-09-14 | 2016-09-07 | （新福佳）澳大利亚环境科技有限公司 | Passive mass flux measurement method and measuring instrument |
| CN106018004A (en) * | 2016-06-24 | 2016-10-12 | 北京市环境保护科学研究院 | Passive soil gas collecting device, system and method |
-
2014
- 2014-12-26 CN CN201410823713.8A patent/CN104458354A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181400A (en) * | 2015-05-29 | 2015-12-23 | 福建拓普检测技术有限公司 | Sampling device |
| CN105181400B (en) * | 2015-05-29 | 2018-05-11 | 福建拓普检测技术有限公司 | A kind of sampling apparatus |
| CN105928834A (en) * | 2015-09-14 | 2016-09-07 | （新福佳）澳大利亚环境科技有限公司 | Passive mass flux measurement method and measuring instrument |
| CN106018004A (en) * | 2016-06-24 | 2016-10-12 | 北京市环境保护科学研究院 | Passive soil gas collecting device, system and method |
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Application publication date: 20150325 |