CN108444777A - The simple capturing device of volatile ingredient in a kind of air - Google Patents
The simple capturing device of volatile ingredient in a kind of air Download PDFInfo
- Publication number
- CN108444777A CN108444777A CN201810588078.8A CN201810588078A CN108444777A CN 108444777 A CN108444777 A CN 108444777A CN 201810588078 A CN201810588078 A CN 201810588078A CN 108444777 A CN108444777 A CN 108444777A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- air
- capturing device
- volatile ingredient
- sample injection
- Prior art date
- 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.)
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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
-
- 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
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/405—Concentrating samples by adsorption or absorption
Abstract
The present invention discloses a kind of simple capturing device of volatile ingredient in air, including trap tube (1), the first nozzle (6), the second nozzle (7) and third nozzle (8) are provided on trap tube (1), it is equipped with filter screen (2) at second nozzle (7), control valve (3) is provided at third nozzle (8)；Filter screen (2) limits sorbing material accommodating chamber jointly with control valve (3), absorbing material granules are accommodated in sorbing material accommodating chamber, the aperture of filter screen is less than the diameter of absorbing material granules, connection is connected with piston type aspirator (5) air-flow for second nozzle (7), and connection is connected with sample injection bottle (4) air-flow in third nozzle (8).The present invention is selectively good, and the sample of this method processing is after sorbing material traps, and object has obtained selective enrichment on the adsorbent material, and sample analysis is selectively improved.
Description
Technical field
The invention belongs to chemical analysis field, it is related to a kind of simple capturing device of volatile ingredient in air.
Background technology
Currently, quality of air environment is one of the important information that people pay close attention to daily, because the quality of air quality is directly
Influence the health of human body.In daily life, influence of the indoor air quality to health is maximum, such as fits up room
The harmful substance generated during room can cause prodigious harm by children's sucking, and what is such as generated in processing factory's workshop has poison gas
Body, the worker to construct inside are easy to suck, and it is unfavorable to be brought to the health of worker.Indoor air quality is detected
Demand also with more and more.
The detection device of the prior art, in place of air sampler comes with some shortcomings in use, such as：1, existing
There is air sampler to be charge mode or need power supply, causes not using in the inconvenient place of no power supply or charging；2、
Sorptive material in sample trap tube and trap tube in existing air sampler are integral type, and trap tube is mostly glass
Material after having acquired sample, takes out sorbing material and needs to crush trap tube, be easy to cause sample pollution, detection it is inaccurate and
People is damaged；3, progress transfer, concentration, desorption etc. are needed after sample trapping, and pre-treatments could sample introduction is analyzed, preceding
Slightly poorly sealed so that sorbing material is exposed to air in processing procedure, then volatile ingredient just has different degrees of subtract
It is few, cause testing result inaccurate.
Invention content
The present invention provides a kind of simple capturing device of volatile ingredient in air, efficiently solves room air detection
Step is complicated, carries and detect problem inconvenient, that sample is selectively low.
The simple capturing device of volatile ingredient in a kind of air, including trap tube 1 are provided with the first pipe on trap tube 1
Mouthful the 6, second nozzle 7 and third nozzle 8 are equipped with filter screen 2 at second nozzle 7, control valve 3 are provided at third nozzle 8；Filtering
Net 2 limits sorbing material accommodating chamber jointly with control valve 8, and absorbing material granules are accommodated in sorbing material accommodating chamber, filters
The aperture of net is less than the diameter of absorbing material granules, and connection, third nozzle 8 is connected with 5 air-flow of piston type aspirator in the second nozzle 7
Connection is connected with 4 air-flow of sample injection bottle.
In the preferred embodiment of the invention, the capacity of piston type aspirator 5 is 1-10L, and barrel is transparent and indicates scale.
In the preferred embodiment of the invention, third nozzle 8 is detachably connected with sample injection bottle 4.
In the preferred embodiment of the invention, sample injection bottle 4 is ml headspace bottle, is threadedly coupled with third nozzle 8.
In the preferred embodiment of the invention, absorbing material granules are molecule marking material particle.
In the preferred embodiment of the invention, molecule marking material particle includes polystyrene-divinylbenzene absorption tree
Fat particle, ion-exchange resin particles, polycyclic aromatic hydrocarbon particle and nitrosamine particle.
In the preferred embodiment of the invention, the material of control valve 3 is glass, and good airproof performance is used for when being horizontal
Sample traps, and sorbing material falls into sample injection bottle by gravity when being rotated by 90 °.
In the preferred embodiment of the invention, 2 material of filter screen is glass, and aperture is less than sorbing material diameter, prevents from inhaling
Enclosure material enters piston type aspirator 5 or drops out trap tube 1.
In the preferred embodiment of the invention, in sample injection bottle 4 there is desorbed fluid or sample injection bottle 4 to enter with desorbed fluid
Mouthful.
In the preferred embodiment of the invention, 4 outside of sample injection bottle has heating device.
In the preferred embodiment of the invention, above there is spiral cover, open and be added for sorbing material, is covered tightly when trapping sample close
Envelope.
There is mobility desorbed fluid or sample injection bottle 4 to have desorption in the preferred embodiment of the invention, in sample injection bottle 4
Fluid inlet.The effect of desorbed fluid be so that fall into the volatile ingredient adsorbed in the sorbing material in bottle be desorbed out and
It is distributed in desorbed fluid, which can be liquid or gas, after can carrying the volatile ingredient entrance in next step
In continuous analytical instrument.Alternatively, 4 outside of sample injection bottle can also have heating device, acted on by thermal desorption so that falling into the suction in bottle
The volatile ingredient adsorbed in enclosure material is desorbed out.
Advantageous effect：
(1) trap tube is designed to freely to control by the present invention with absorbing material granules therein are contained in by control valve
The pattern for discharging sorbing material avoids the need for trap tube crushing could take out sorbing material, and has conveniently realized sample
Closed transfer and desorption process, on the one hand sample convenient and efficient, and another aspect trap tube may be reused, reduce detection at
This, and collects after sample without carrying out pre-treatment, can sample introduction is analyzed after sorbing material trapping.
(2) selectivity is good, and after sorbing material traps, object obtains the sample of this method processing on the adsorbent material
Selective enrichment, sample analysis are selectively improved.
(3) apparatus of the present invention are not necessarily to the power supply that charges or carry, and carry, detect unrestricted, especially suitable charging inconvenience,
There is no the environment measuring of power supply.
Description of the drawings
Fig. 1 is the structural schematic diagram of the capturing device of volatile ingredient in air of the present invention；
Wherein, reference numeral meaning is as follows：
1- trap tubes, 2- filter screens, 3- control valves, 4- sample injection bottles, 5- piston type aspirators, the first nozzles of 6-, 7- second
Nozzle, 8- control valves.
Specific implementation mode
Embodiment 1
The simple capturing device of volatile ingredient in a kind of air, including trap tube 1 are provided on trap tube 1, the first pipe
Mouthful the 6, second nozzle 7 and third nozzle 8 are equipped with filter screen 2 at second nozzle 7, control valve 3 are provided at third nozzle 8；Filtering
Net 2 limits sorbing material accommodating chamber jointly with control valve 8, and absorbing material granules are accommodated in sorbing material accommodating chamber, filters
The aperture of net is less than the diameter of absorbing material granules, and connection, third nozzle 8 is connected with 5 air-flow of piston type aspirator in the second nozzle 7
Connection is connected with 4 air-flow of sample injection bottle.
In the present embodiment, the capacity of piston type aspirator 5 is 1L, and barrel is transparent and indicates scale.
In the present embodiment, sample injection bottle 4 is ml headspace bottle, is threadedly coupled with third nozzle 8.
In the present embodiment, absorbing material granules are molecule marking material particle.
In the present embodiment, molecule marking material particle is polystyrene-divinylbenzene adsorption resin particles.
In the present embodiment, the material of control valve 3 is glass, and good airproof performance is trapped for sample when being horizontal, rotation
Sorbing material falls into sample injection bottle by gravity when turning 90 °.
In the present embodiment, 2 material of filter screen is glass, and aperture is less than sorbing material diameter, prevents sorbing material from entering work
Plug aspirator 5 drops out trap tube 1.
Embodiment 2
The present embodiment is the air quality measured in finishing 2 months tobacco leaves storage workshop.
Ion-exchange resin particles are taken to be added in trap tube, adjustment control valve 3 to horizontal position pulls piston, with
The flow velocity of 0.5mL/min aspirates air, and after trapping 20min, control valve 3, which is rotated by 90 °, makes absorbing material granules pass through gravity
Sample injection bottle 4 is fallen into, sample injection bottle 4 is removed, is analyzed into HS-GC-MS combined instruments.
Head-space sampler condition is：Sample equilibration temperature is 80 DEG C, and circumstance temperature degree is 140 DEG C, and transmission line temperature is 150 DEG C,
Sample equilibration time is 20min, pressing time 0.2min, inflationtime 0.2min, sample injection time 0.1min.
GC conditions are：Chromatographic column be the special capillary columns of VOC or equivalent column, length 60m × internal diameter 0.32mm ×
Film thickness 1.8m；Carrier gas is helium (He)；Injector temperature is 150 DEG C；Constant current mode, column flow 1.0mL/min, split ratio 10:
1；Temperature programming is 40 DEG C, keeps 1.5min, is warming up to 180 DEG C with the rate of 2 DEG C/min, keeps 6min.Mass Spectrometry Conditions are：Electricity
It is electron bombardment ionization source (EI) from mode, ion source temperature is 200 DEG C, ionizing energy 70eV；Transmission line temperature：200℃；Detection
Pattern：Full scan monitoring pattern, mass scan range：30amu~300amu；Solvent delay：1.5min.
The testing result of volatile ingredient is in sample：1.23 μ g/m of methanol3, 18.72 μ g/m of ethyl alcohol3, 3.37 μ of isopropanol
g/m3, 1.69 μ g/m of butanone3, 3.71 μ g/m of ethyl acetate3, 1.01 μ g/m of n-butanol3, 0.25 μ g/m of benzene3, n-propyl acetate 1.69
μg/m3, 0.14 μ g/m of 4-methyl-2 pentanone3, 3.23 μ g/m of toluene3, 0.25 μ g/m of n-butyl acetate3, 0.33 μ g/m of ethylbenzene3,
Between, 0.59 μ g/m of p-xylene3, 0.25 μ g/m of 2- ethoxyethyl acetates3, 0.03 μ g/m of cyclohexanone3, dimethyl succinate
0.46μg/m3, 1.58 μ g/m of dimethyl glutarate3, 0.48 μ g/m of dimethyl adipate3。
Embodiment 3
The present embodiment is the air quality measured in finishing 2 months tobacco leaves storage workshop.
Air sampling tube is connect with existing air sampler, air is aspirated with the flow velocity of 0.5mL/min, after trapping 20min,
Sampling pipe taking-up material for trapping is clipped broken with tweezers and is put into ml headspace bottle, and sample is analyzed with HS-GC-MS combination analysis method in embodiment 2
Product.
The testing result of volatile ingredient is in sample：0.86 μ g/m of methanol3, 13.65 μ g/m of ethyl alcohol3, 2.56 μ of isopropanol
g/m3, 1.34 μ g/m of butanone3, 2.67 μ g/m of ethyl acetate3, 0.86 μ g/m of n-butanol3, 0.12 μ g/m of benzene3, n-propyl acetate 1.24
μg/m3, 0.06 μ g/m of 4-methyl-2 pentanone3, 1.12 μ g/m of toluene3, 0.13 μ g/m of n-butyl acetate3, 0.21 μ g/m of ethylbenzene3,
Between, 0.42 μ g/m of p-xylene3, 0.14 μ g/m of 2- ethoxyethyl acetates3, 0.02 μ g/m of cyclohexanone3, dimethyl succinate
0.14μg/m3, 1.17 μ g/m of dimethyl glutarate3, 0.21 μ g/m of dimethyl adipate3。
From the data measured by embodiment 2 and embodiment 3, it can be seen that the device of the invention is waved in the air measured
The content higher of hair property ingredient illustrates that the accuracy that the device of the invention measures uses the more accurate of device measurement than existing air
Really, this is because the sample of collection without being again transferred in sample bottle to be tested by apparatus of the present invention, but can be direct
The sample of collection is subjected to chromatography, operating time length in transfer process is avoided and sample is caused to volatilize and waste.The present invention
Substantially increase the detection accuracy of volatile ingredient in air.
Claims (8)
1. the simple capturing device of volatile ingredient in a kind of air, which is characterized in that including trap tube (1), on trap tube (1)
It is provided with the first nozzle (6), the second nozzle (7) and third nozzle (8), filter screen (2), third pipe are equipped at the second nozzle (7)
It is provided with control valve (3) at mouth (8)；Filter screen (2) limits sorbing material accommodating chamber, sorbing material jointly with control valve (3)
Absorbing material granules are accommodated in accommodating chamber, the aperture of filter screen is less than the diameter of absorbing material granules, the second nozzle (7) and work
Connection is connected with sample injection bottle (4) air-flow in the conducting connection of plug aspirator (5) air-flow, third nozzle (8).
2. the capturing device of volatile ingredient in air according to claim 1, which is characterized in that piston type aspirator
(5) capacity is 1-10L, and barrel is transparent and indicates scale.
3. the capturing device of volatile ingredient in air according to claim 2, which is characterized in that third nozzle (8) with
Sample injection bottle (4) is detachably connected.
4. the capturing device of volatile ingredient in air according to claim 3, which is characterized in that sample injection bottle (4) is top
Empty bottle is threadedly coupled with third nozzle (8).
5. the capturing device of volatile ingredient in air according to claim 4, which is characterized in that absorbing material granules are
Molecule marking material particle.
6. the capturing device of volatile ingredient in air according to claim 4, which is characterized in that molecule marking material
Grain includes polystyrene-divinylbenzene adsorption resin particles, ion-exchange resin particles, polycyclic aromatic hydrocarbon particle and nitrosamine
Particle.
7. the capturing device of volatile ingredient in air according to claim 1, which is characterized in that have in sample injection bottle 4
Desorbed fluid or sample injection bottle 4 have desorbed fluid entrance.
8. the capturing device of volatile ingredient in air according to claim 1, which is characterized in that 4 outside tool of sample injection bottle
There is heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810588078.8A CN108444777A (en) | 2018-06-08 | 2018-06-08 | The simple capturing device of volatile ingredient in a kind of air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810588078.8A CN108444777A (en) | 2018-06-08 | 2018-06-08 | The simple capturing device of volatile ingredient in a kind of air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108444777A true CN108444777A (en) | 2018-08-24 |
Family
ID=63206811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810588078.8A Withdrawn CN108444777A (en) | 2018-06-08 | 2018-06-08 | The simple capturing device of volatile ingredient in a kind of air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108444777A (en) |
-
2018
- 2018-06-08 CN CN201810588078.8A patent/CN108444777A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20180824 |