CN106908284A - A kind of pump-free type samplers gathered for benzene in air, toluene - Google Patents
A kind of pump-free type samplers gathered for benzene in air, toluene Download PDFInfo
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- CN106908284A CN106908284A CN201710188349.6A CN201710188349A CN106908284A CN 106908284 A CN106908284 A CN 106908284A CN 201710188349 A CN201710188349 A CN 201710188349A CN 106908284 A CN106908284 A CN 106908284A
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- China
- Prior art keywords
- pump
- free type
- type samplers
- samplers
- polyurethane foam
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title description 39
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 title description 39
- 238000005070 sampling Methods 0.000 claims abstract description 58
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 14
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 239000004411 aluminium Substances 0.000 claims abstract description 10
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims abstract 2
- 239000004033 plastic Substances 0.000 claims abstract 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 12
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 1
- 239000003463 adsorbent Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000036541 health Effects 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000000505 pernicious effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 6
- 208000028571 Occupational disease Diseases 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 231100000935 short-term exposure limit Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A kind of pump-free type samplers.Mainly include the circular activity carbon plate of poly fourfluoroplastics shell, aluminium lid, the hydrophobic filter membrane of polytetrafluoro, threadiness, polyurethane foam, collar folder.Specifically comprise：Two parallel polytetrafluoroethylplastic plastic tube sections of carbon plate are placed in two ends, middle to separate fixation with polyurethane foam, and mouth of pipe two ends are covered with the hydrophobic filter membrane of polytetrafluoro, and clamping is fixed with aluminium lid.The advantage of the sampler is：Two-way penetrating shell mechanism is beneficial to improve sampling efficiency, and in absorption flux, sample stability aspect is attained by satisfied effect, and the adsorbent based on activated carbon can be monitored effectively to the pernicious gas in most of environment.The sampler has very huge potentiality in terms of miniaturization, portability, suffers from being widely applied prospect in various fields such as occupational health, environmental monitorings, especially to the personal sampling important in inhibiting in occupational health field.
Description
Technical field
The present invention relates to a kind of for benzene in air, the pump-free type samplers of toluene collection, specially one nothing of cylindricality
Pump-type sampler.
Background technology
Currently, China's prevention and cure of occupational disease field face the situation of sternness, and occupational disease is occurred frequently, endangers serious circumstantial impact
The stabilization of expanding economy and society.In order to effectively prevent the generation of occupational disease, Occupational Disease Hazards main body labourer is ensured
It is healthy, the Occupational Hazard Factors detection of system is essential with appraisal.In China, occupational health field it is main with
Time integration algorithm, STEL, maximum permissible concentration judge adverse factor in workplace
The influence healthy to labourer, wherein the former need a sampling time more long, afterwards both need sampling time compared with
It is short.The current main flow method of sampling has：1st, direct sampling method；2nd, there is pump-type sampling method；3rd, pump-free type sampling method.Direct sampling method pair
The form of sample and preservation have higher requirements, therefore use scope narrower；There is pump-type sampling method to use extensive, as a result precisely, for
Short time grab sampling can obtain satisfactory result, but need to carry air sampling pump during sampling, to sampling pump discharge, electricity, prevent
Quick-fried performance etc. also has certain requirement；Pump-free type sampling method is a kind of emerging method, the design of pump-free type samplers in recent years
Universal small volume and less weight, will not impact when wearing to labourer's work, be particularly suitable for long-time personal sampling, when calculating
Between have the advantage of uniqueness in weighted average allowable concentration.The popularization of pump-free type samplers has significantly to occupational health detection level
Ground impetus, but also has many restraining factors, especially needs to diffusion coefficient, and the aspect such as sampling efficiency is done and further ground
Demonstration is studied carefully, so as to obtain reliably result.
CN103398878A discloses a kind of passive air sampler, and adsorption cover has been set in main adsorbent box upper cover, inhales
The lower inner wall of via layer, porous shield and absorption cover body in attached cover body defines purification chamber, via layer, closure
And upper inside wall defines the accommodating cavity of accommodating additional adsorbent.The sampler has the degree of accuracy higher.
CN205398634U discloses a kind of miillpore filter air sampler, including upper box and lower box, therebetween
Connected by ring flange, and sealing gasket is provided between the ring flange of the two；The upper box top is provided with the first filtering knot
Structure；The top of the lower box is provided with the second filtration；Vavuum pump is connected with the bleeding point of lower box；The upper box
And the sensory package for monitor in real time this air sampler internal state is equipped with inside the lower box.The air is adopted
Sample device can be powered using standby power supply module, small volume, lightweight, simple structure, using reliable and stable.
The content of the invention
It is an object of the invention to provide a kind of two-sided penetrating pump-free type samplers, with preferable sampling efficiency and extensively
Applicability, the present invention selection certain size and structure, ensure that the accuracy and repeatability of test result.
The invention discloses a kind of new pump-free type samplers, mainly including aluminium lid, polytetrafluoroethylene (PTFE) shell, polytetrafluoro
Hydrophobic filter membrane, polyurethane foam, circular fiber shaped activated carbon piece, collar folder, specially：Two carbon plates are placed in polytetrafluoroethylene (PTFE) modeling
Expects pipe two ends, middle to separate fixation with polyurethane foam, mouth of pipe two ends are covered with the hydrophobic filter membrane of polytetrafluoro, use aluminium lid fixing card
Tightly.This structure can increase the contact area of carbon plate and air, pump-free type samplers of the invention is had sampling higher
Speed.
The sampler is shaped as cylindrical type.
Described pump-free type samplers, it is characterised in that the sampler is two-sided penetrating.
Each pump-free type samplers preferably uses 2 using 2-4 pieces activity carbon plate.Each pump-free type samplers uses 1-3
Block polyurethane foam is fixed, and preferably each pump-free type samplers is fixed using 1 piece of polyurethane foam.
The specification of the polytetrafluoroethylene (PTFE) pipe shell is：Length 2cm, external diameter 13mm, internal diameter 11mm.
A diameter of 11mm, the quality 13mg of the circular activity carbon plate of threadiness, spacing is 16mm between carbon plate, it is middle with
Polyurethane foam is fixed, it is ensured that it does not loosen in shell.With polyurethane foam fix carbon plate, polyurethane foam length 16mm,
Diameter 11mm.The aluminium lid diameter 13mm, hollow, a diameter of 9mm of clear portion.The hydrophobic μ of filter sizes 0.45 of polytetrafluoro
M, diameter 13mm.
The circular activity carbon plate of threadiness is placed in 120 DEG C of baking oven high temperatures and is processed 2 hours with preceding closed preservation, activation
Standby afterwards, assembling and process must ensure the cleaning of fibrous carbon plate and complete.
The aluminium lid diameter 13mm, hollow, a diameter of 11mm of clear portion.
Brief description of the drawings
Fig. 1 is the overall structure diagram of two-sided pump-free type samplers of the invention, and long measure is millimeter in figure；
Fig. 2 is two-sided pump-free type samplers of the invention to benzene sampling quantity and the linear relationship of time；
Fig. 3 is two-sided pump-free type samplers of the invention to toluene sampling quantity and the linear relationship of time；
Fig. 4 is temperature to two-sided pump-free type samplers collection benzene of the invention, the influence of toluene sampling rate；
Fig. 5 is humidity to two-sided pump-free type samplers collection benzene of the invention, the influence of toluene sampling rate；
Fig. 6 is wind speed to two-sided pump-free type samplers collection benzene of the invention, the influence of toluene sampling rate.
Specific embodiment
Will be circular living according to the good aluminium lid of regulation dimensioned, polytetrafluoroethylene (PTFE) shell, the hydrophobic filter membrane of polytetrafluoro, threadiness
The parts such as property carbon plate (2) combine obtain sampler successively.
Sampling experimental is carried out using sampler of the present invention, and the sampled result obtained to sampler carries out reliability
Analysis.
The simulation of experimental situation
Environmental simulation uses dynamic air-distributing device, and environment (temperature, humidity, wind speed, the gas of stabilization are reached in control gas distributing chamber
Pressure keeps constant).Each pump-free type samplers correspondence one of the invention has pump sampler, and one group is acquired two-by-two, pump stream
Speed is about 100mL/min (being defined by front and rear calibrated fluxes average of sampling during calculating).Collection 30,60,120,240min is obtained
As a result, compare.
The desorption of sample
The sample that two kinds of sample modes are obtained is desorbed respectively：A) there is pump-type sampling method：By the activity in sample cell
Charcoal takes out and is placed in 1.5mL sample bottles, adds 1mL carbon disulfide solvents to desorb 30min, standby；B) pump-free type of the invention is adopted
Sampling device：Carbon plate in withdrawing device is placed in 5mL sample bottles, adds 2mL carbon disulfide solvents desorption 30min, takes 800 μ L bis-
Nitric sulfid is placed in 1.5mL sample bottles, adds the 200 above-mentioned stripping liquids of μ L, standby after mixing.
The analysis condition of sample
Sample is analyzed using Shimadzu GC-2010 (FID) gas chromatograph.
Testing conditions：Chromatographic column：HP-5：30m×320μm×0.25μm；Injector temperature：200℃；Split ratio：20:1；
Column temperature：40 DEG C of holding 3min, 140 DEG C, common 7min are warmed up to the speed of 25 DEG C/min；Column flow rate：2mL/min；Detector
(FID) temperature：250℃
Testing result and analysis
The measure of sampling rate
In 25 DEG C of temperature, under the conditions of humidity 40%, the sampled result sampled to two kinds of organic matters is as shown in table 1：
25 DEG C of 1 temperature of table, under the conditions of humidity 40%, pump-free type samplers are to benzene, the sampling rate of toluene
Sampling rate changes with time relation
Experimental group and control group are placed in distributing cabinet and sample 30 respectively, 60,120,240min, sampling pump sampling rate
100mL/min, with control group concentration result of calculation as foundation, calculates the sampling rate of pump-free type samplers, acquired results such as table 2
It is shown：
Relation (mL/min) of the pump-free type samplers of table 2 to benzene, the sampling rate of toluene and sampling time
According to GB/T 18470-2001《Pump-free type sampling (detection) device technical specification》Middle sampling flow computing formula can
Know, if pump-free type samplers sampling rate stabilization, sampling quantity is in good linear relationship with the sampling time.As shown in Figure 1, grind
The pump-free type samplers stable performance of system, meets the requirement in technical specification.
The influence of temperature, humidity and wind speed to pump-free type samplers sampling efficiency
We change the physical environment in storehouse to simulate the yard of varying environment by setup parameter of the regulation with gas storehouse
Institute, influence of the research physical factor to pump-free type samplers sampling rate.
Set environment relative humidity is 40%, does not start fan, and actual relative humidity is 38-41%, wind speed 0.03m/s.
Setting is respectively 20 DEG C, 30 DEG C, 40 DEG C with gas storehouse temperature, and sampling is started after 2h is stablized, and sample duration 120min, obtains difference
At a temperature of pump-free type samplers to benzene, the sampling rate of toluene.Likewise, humidity, wind can be obtained by controlling its dependent variable
Speed influences on pump-free type samplers sampling rate, and acquired results are as shown in table 3：
Pump-free type samplers are to benzene, the sampling rate (mL/min) of toluene under the different temperatures of table 3
Pump-free type samplers are to benzene, the sampling rate (mL/min) of toluene under the different humidity of table 4
Pump-free type samplers are to benzene, the sampling rate (mL/min) of toluene under the different wind speed of table 5
Be can be seen that before adsorbent not up to maximum adsorption capacity by above experimental data, the sampling of sampler
Flow is constant, not time to time change, and sampling quantity increases linearly over time.The size of sampling flow mainly with adsorbent property,
The contact area and harmful substance of adsorbent and air property in itself are relevant, i.e., after pump-free type samplers design typification,
Sampling flow for certain nuisance is certain.
Two-sided pump-free type samplers of the present invention are two-way penetrating, sampling efficiency, adsorb flux, sampling stability etc. and refer to
Mark is attained by expected effect, can be monitored well for the pernicious gas in most of environment, in occupational health, ring
The various fields such as border monitoring suffer from very huge application potential.Sampling flow stabilization of the present invention, contrasts existing sampler
Improve, sampling performance is more stablized under various circumstances, is very useful Novel sampler.
Claims (10)
1. a kind of new pump-free type samplers, mainly including aluminium lid, polytetrafluoroethylene (PTFE) shell, the hydrophobic filter membrane of polytetrafluoro, poly- ammonia
Ester foam, circular fiber shaped activated carbon piece, collar folder, specially：Two carbon plates are placed in polytetrafluoroethylplastic plastic pipe two ends, middle
Fixation is separated with polyurethane foam, mouth of pipe two ends are covered with the hydrophobic filter membrane of polytetrafluoro, and clamping is fixed with aluminium lid.
2. pump-free type samplers as claimed in claim 1, it is characterised in that the sampler is cylindrical-shaped structure；The sampling
Device is two-sided penetrating.
3. pump-free type samplers as claimed in claim 1, it is characterised in that each pump-free type samplers uses 2-4 piece activated carbons
Piece.
4. pump-free type samplers as claimed in claim 3, it is characterised in that each pump-free type samplers uses 2 activated carbons
Piece.
5. pump-free type samplers as claimed in claim 1, it is characterised in that each pump-free type samplers uses 1-3 block polyurethane
Foam is fixed.
6. pump-free type samplers as claimed in claim 5, it is characterised in that each pump-free type samplers uses 1 piece of polyurethane foam
Foam is fixed.
7. pump-free type samplers as claimed in claim 1, it is characterised in that active carbon plate is placed in 120 DEG C of baking ovens using preceding
High-temperature process 2 hours, uses after activation.
8. pump-free type samplers as claimed in claim 1, it is characterised in that the length 2cm of the polytetrafluoroethylene (PTFE) shell, outward
Footpath 13mm, internal diameter 11mm.
9. pump-free type samplers as claimed in claim 1, it is characterised in that a diameter of 11mm of the activated carbon disk, thickness
2mm, quality 13mg, spacing is 16mm between carbon plate, and centre is fixed with polyurethane foam；Polyurethane foam length 16mm, diameter
11mm；The aluminium lid diameter 13mm, a diameter of 9mm of clear portion.
10. pump-free type samplers as claimed in claim 1, it is characterised in that hydrophobic 0.45 μm of the filter sizes of polytetrafluoro, directly
Footpath 13mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710188349.6A CN106908284A (en) | 2017-03-27 | 2017-03-27 | A kind of pump-free type samplers gathered for benzene in air, toluene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710188349.6A CN106908284A (en) | 2017-03-27 | 2017-03-27 | A kind of pump-free type samplers gathered for benzene in air, toluene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106908284A true CN106908284A (en) | 2017-06-30 |
Family
ID=59195976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710188349.6A Pending CN106908284A (en) | 2017-03-27 | 2017-03-27 | A kind of pump-free type samplers gathered for benzene in air, toluene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106908284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535397A (en) * | 2018-04-12 | 2018-09-14 | 福建拓普检测技术有限公司 | N-hexane concentration detection method in a kind of Work places |
| CN109387399A (en) * | 2017-08-09 | 2019-02-26 | 中国石油化工股份有限公司 | Silicon rubber film sampler for individuals without pump and purposes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003294592A (en) * | 2002-04-03 | 2003-10-15 | Hitachi Chem Co Ltd | Sampler for atmospheric trace hazardous substance |
| CN101126686A (en) * | 2007-09-29 | 2008-02-20 | 山东省职业卫生与职业病防治研究院 | Tube type pump-free type samplers |
| CN201561886U (en) * | 2009-11-13 | 2010-08-25 | 宇星科技发展(深圳)有限公司 | Passive sampler in VOCs (Volatile Organic Compounds) monitoring system |
| CN105115785A (en) * | 2015-08-26 | 2015-12-02 | 杭州普洛赛斯检测科技有限公司 | Preparation method of sampling tube of dimethylamine and trimethylamine in air and waste gas |
| CN205643267U (en) * | 2016-03-17 | 2016-10-12 | 中国安全生产科学研究院 | Novel two -sided no pump type sample thief |
-
2017
- 2017-03-27 CN CN201710188349.6A patent/CN106908284A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003294592A (en) * | 2002-04-03 | 2003-10-15 | Hitachi Chem Co Ltd | Sampler for atmospheric trace hazardous substance |
| CN101126686A (en) * | 2007-09-29 | 2008-02-20 | 山东省职业卫生与职业病防治研究院 | Tube type pump-free type samplers |
| CN201561886U (en) * | 2009-11-13 | 2010-08-25 | 宇星科技发展(深圳)有限公司 | Passive sampler in VOCs (Volatile Organic Compounds) monitoring system |
| CN105115785A (en) * | 2015-08-26 | 2015-12-02 | 杭州普洛赛斯检测科技有限公司 | Preparation method of sampling tube of dimethylamine and trimethylamine in air and waste gas |
| CN205643267U (en) * | 2016-03-17 | 2016-10-12 | 中国安全生产科学研究院 | Novel two -sided no pump type sample thief |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387399A (en) * | 2017-08-09 | 2019-02-26 | 中国石油化工股份有限公司 | Silicon rubber film sampler for individuals without pump and purposes |
| CN108535397A (en) * | 2018-04-12 | 2018-09-14 | 福建拓普检测技术有限公司 | N-hexane concentration detection method in a kind of Work places |
| CN108535397B (en) * | 2018-04-12 | 2020-05-19 | 福建拓普检测技术有限公司 | Method for detecting n-hexane concentration in workplace |
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Application publication date: 20170630 |