CN206420682U - PAHs harvesters in a kind of small-sized air - Google Patents
PAHs harvesters in a kind of small-sized air Download PDFInfo
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- CN206420682U CN206420682U CN201621401333.6U CN201621401333U CN206420682U CN 206420682 U CN206420682 U CN 206420682U CN 201621401333 U CN201621401333 U CN 201621401333U CN 206420682 U CN206420682 U CN 206420682U
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Abstract
The utility model discloses PAHs harvesters in a kind of small-sized air, including top cover, sampling head, sleeve, sampling loading pipe, main body, the top cover is used to cover the sampling head, glass fiber filter is provided between top cover and sampling head, the glass fiber filter is supported by the filter holder being located on sampling head, the top half of the sleeve is enclosed on the bottom of sampling head, the latter half of the sleeve is provided with internal thread, the top half of the main body is provided with external screw thread, the internal thread of sleeve is engaged with the external screw thread of main body, the sampling loading pipe is located in main body, the sampling built-in sampling filler of loading pipe.Sampling apparatus of the present utility model is simple in construction, compact volume and convenience, simple economy, the gaseous state and particulate form PAHs in air can be gathered, and picking rate is fast, the PAHs that can be used for collecting particulate form using glass fiber filter in sampling head front portion, the porous organic composite resins of filling XAD 2 can be used for collecting gaseous state PAHs in sampling loading pipe, and gaseous state simultaneously and particulate form collection can be realized on same sampler.
Description
Technical field
The utility model is related to sampling apparatus technical field, is specifically related to PAHs harvesters in a kind of small-sized air.
Background technology
PAHs in air exists in two kinds of forms of gaseous state and particulate form, it will be appreciated that PAHs pollution situations in air, just needs
By the PAHs separation detections of two kinds of forms.At present, the atmospheric sampling technology to PAHs mainly includes actively sampling and passively adopted
Two kinds of sample.
Actively sampling is also known as dynamic sampling, refers to produce power using gas production pump, forms negative pressure, bypass air through and adopt
The collection device of sample instrument, collection device utilizes the polluter in certain adsorbent collection or retention air.Specific to air
In particulate form PAHs collection, be often collected using filter membrane, conventional filter membrane has glass fiber filter, silverskin, silicon at present
Quartz and polytetrafluoroethylene (PTFE) etc., the blank value of wherein polytetrafluoroethylene (PTFE) is minimum, and collecting efficiency is also higher, but because it is relatively held high
It is expensive, so being most commonly used that glass fiber filter at present.Gaseous state PAHs needs to gather using certain adsorbent, conventional at present
Adsorbent has：Porous organic composite resin (XAD), polyurethane (PUF), poly- 2,6- diphenyl p-phenylene (Tenax),
Florisil silica (Florisil) and Polypak (Chromosorb102), most common of which is PUF
And XAD.
Because the PAHs contents in outside atmosphere are relatively low, generally use big flow sampler, flow in more than 100L/min,
To obtain the PAHs of sufficient amount using larger flow, it is easy to the extraction in later stage to detect.And for indoor sampling, be mainly used in
The monitoring of occupational environment, it is of interest that the PAHs of high concentration, uses low discharge sampler, flow velocity is in 1-3L/min or so mostly.
The advantage of active sampling method is that its automaticity is high, can Accurate Determining air volume, and picking rate is fast,
Sampling quantity is big, can avoid decomposition or other uncertain factors that sample long-term acquisition is brought, can also measure pollutant
Instantaneous concentration, therefore, it is possible to be monitored at times in short-term.But its shortcoming is that sampling instrument is excessively heavy, during sampling noise compared with
Greatly, and need connect power supply, it is impossible to long-time continuous sampling.
In recent years, passive sampling technology have developed rapidly, and passive sampling is also known as unpowered sampling, be expanded based on gas molecule
Dissipate a kind of method of sampling of gaseous state or vaporous pollutant in principle collection air.Diffusion is natural phenomena, gas or steam meeting
From the air of high concentration to the sampler diffusion inside of low concentration, there is an absorbed layer inside sampler, gas or steam are inhaled
Receive and be enriched with, then carry out the extractive analysis of next step.In theory, after sampling after a while, in sampler
Pollutant concentration be exactly pollutant concentration in environment by the concentration reached with the concentration in air in balance, i.e. adsorbent.
The approach for entering adsorbent according to molecule is classified, and common passive sampling apparatus can be divided into diffused
(Diffiision Passive Sampler) and osmosis type (Permeation Passive Sampler) two classes.PAHs's
In passive sampling, conventional adsorbent has：XAD-2, Tenax, PUF, solid beta-schardinger dextrin, Chromonsorb 102 etc., wherein
Most commonly PUF.
Passive sampling have the advantages that it is quiet, conveniently, do not need power, it is cheap, can be sampled for a long time, for
The detection of environmental exposure class has suitable advantage.But its shortcoming is it is also obvious that due to needing prolonged place to sample, it is impossible to
Accurately record flow, the data meeting misalignment in the case of pollutant concentration changes significantly in short-term, therefore can not be divided in short-term
When sample.Further, since sampling for a long time, chemical change can occur for the material such as PAHs, the degree of accuracy influence on experiment is larger.
Compared with passive sampling technology, there is active Sampling techniques interior big flow sampling in short-term to reach pollutant detection limit
The features such as required sampling quantity, measure flow are accurate and gather particulate form and gaseous state PAHs simultaneously, can be very good to carry out at times
Fast slowdown monitoring sampling.The sampling time can be greatly shortened simultaneously, and gaseous state and particulate form pollutant are effectively separated.Mesh
Before, the big flow sampler for meeting national standard is more rare, it is necessary to band large-scale metal accessory customized, expensive and carrying inconvenience.
Utility model content
The technical problem that the utility model is solved is to provide PAHs harvesters in a kind of small-sized air, the compact side of the device
Just, simple economy, can realize gaseous state simultaneously and particulate form collection on same sampler.
The technical solution of the utility model is：
PAHs harvesters in a kind of small-sized air, including top cover, sampling head, sleeve, sampling loading pipe, main body, it is described
Top cover be used for cover the sampling head, between top cover and sampling head be provided with glass fiber filter, the glass fiber filter by
The filter holder support on sampling head is located at, the top half of the sleeve is enclosed on the bottom of sampling head, the lower half of the sleeve
Part is provided with internal thread, and the top half of the main body is provided with external screw thread, and the internal thread of sleeve is engaged with the external screw thread of main body,
The sampling loading pipe is located in main body, the built-in sampling filler of loading pipe of sampling.
Further, in such scheme, the filter holder is stainless steel.
Further, in such scheme, the aperture of the glass fiber filter is 1-5 μm, outside glass fiber filter
Sight is shaped as circle, a diameter of 42mm.
Further, in such scheme, the top and bottom of the sampling loading pipe are respectively equipped with a silicone gasket,
The internal diameter of the sampling loading pipe is that 8mm, external diameter are 12mm, are highly 100mm.
Further, in such scheme, the sampling filler is the porous organic composite resins of XAD-2.
Further, in such scheme, the sampling loading pipe is made up of polytetrafluoroethylene (PTFE).
The beneficial effects of the utility model are：
1) sampling apparatus of the present utility model is simple in construction, compact volume and convenience, simple economy, can accurately control big air-flow
Amount, and picking rate is fast, can be used for the PAHs of separation particulate form using glass fiber filter in sampling head front portion, can be same
Gaseous state simultaneously and particulate form collection are realized on sampler.
2) because sampling filler is XAD-2, it is preserved under cryogenic, and preferably, maximum relative deviation is controlled the rate of recovery
9.16%, largely it is maintained within 5%, extracting method repeatability is preferably.
3) using PAHs harvesters in small-sized air of the present utility model, filling XAD-2 is adsorbent, 1L/min's
4h is gathered under flow and is just able to detect that gaseous state PAHs in air, experimental result is accurate, and repeatability is high, and is avoided that and passively adopts
Error caused by sample method.
Brief description of the drawings
Fig. 1 is surface structure schematic diagram of the present utility model.
Fig. 2 is assembling structure schematic diagram of the present utility model.
Wherein, 1, top cover, 2, glass fiber filter, 3, filter holder, 4, sampling head, 5, sleeve, 6, silicone gasket, 7, adopt
Sample filler, 8, sampling loading pipe, 9, main body.
Embodiment
The utility model is further described in detail with reference to embodiment：
PAHs harvesters in a kind of small-sized air as depicted in figs. 1 and 2, including top cover 1, sampling head 4, sleeve 5, adopt
Sample loading pipe 8, main body 9, top cover 1 are used to cover sampling head 4, and glass fiber filter 2, glass are provided between top cover 1 and sampling head 4
The aperture of glass fibrous filter membrane 2 is 1-5 μm, and the face shaping of glass fiber filter is circle, a diameter of 42mm, glass fiber filter
2 filter holder 3 by being located on sampling head 4 is supported, and filter holder 3 is stainless steel, and the top half of sleeve 5 is enclosed on sampling
First 4 bottom, the latter half of sleeve 5 is provided with internal thread, and the top half of main body 9 is provided with external screw thread, the internal thread of sleeve 5 with
The external screw thread of main body 9 is engaged, and sampling loading pipe 8 is located in main body 9, and the top and bottom of sampling loading pipe 8 are respectively equipped with one
Individual silicone gasket 6, sampling loading pipe 8 is made up of polytetrafluoroethylene (PTFE), the internal diameter of sampling loading pipe 8 be 8mm, external diameter be 12mm,
Highly it is 100mm, the built-in sampling filler 7 of loading pipe 8 of sampling, sampling filler 7 is the porous organic composite resins of XAD-2.
The particulate form and gaseous state PAHs in air are gathered with harvester of the present utility model, sampling flow is 1L/min,
Acquisition time is 4h.
Particulate form PAHs collection：Sampling head 4 is anterior can isolated particulate form using glass fiber filter 2
PAHs。
Gaseous state PAHs collection：On the basis of particulate form PAHs collection, the 1.8g XAD- through over cleaning and drying are used
2 porous organic composite resins are fitted into the sampling loading pipe 8 that special polytetrafluoroethylene (PTFE) is made as sampling filler 7, and collection is big
Gaseous state PAHs in gas.After having gathered, packed with tinfoil, be put into 4 DEG C of refrigerators and save backup.In sampling filler 7
PAHs extracting method is：Testing sample is inserted in clean test tube, add 20ml extract solutions, after sealing is ultrasonically treated, treat
Extractant natural sedimentation, takes 10ml supernatants to move into new test tube, and 40 DEG C of nitrogen are blown to dry, 1mL acetonitrile constant volumes, crosses 0.22 μm of aperture filter
After film, HPLC/UV detections.
Using homemade small-sized gaseous state PAHs sampling heads, filling XAD-2 is adsorbent, and 4h is gathered under 1L/min flow
The gaseous state PAHs in air is just able to detect that, experimental result is accurate, and repeatability is high.
Above-described embodiment and schema and non-limiting product form of the present utility model and style, any art
Appropriate change or modification that those of ordinary skill is done to it, all should be regarded as not departing from patent category of the present utility model.
Claims (6)
1. PAHs harvesters in a kind of small-sized air, it is characterised in that including top cover (1), sampling head (4), sleeve (5), adopt
Sample loading pipe (8), main body (9), the top cover (1) are used to cover the sampling head (4), between top cover (1) and sampling head (4)
Provided with glass fiber filter (2), the glass fiber filter (2) is supported by the filter holder (3) being located on sampling head (4), institute
The top half for stating sleeve (5) is enclosed on the bottom of sampling head (4), and the latter half of the sleeve (5) is provided with internal thread, the master
The top half of body (9) is provided with external screw thread, and the internal thread of sleeve (5) is engaged with the external screw thread of main body (9), the sampling filler
Pipe (8) is located in main body (9), the built-in sampling filler (7) of sampling loading pipe (8).
2. PAHs harvesters in a kind of small-sized air as claimed in claim 1, it is characterised in that the filter holder (3)
For stainless steel.
3. PAHs harvesters in a kind of small-sized air as claimed in claim 1, it is characterised in that the glass fiber filter
(2) aperture is 1-5 μm.
4. PAHs harvesters in a kind of small-sized air as claimed in claim 1, it is characterised in that the sampling loading pipe
(8) top and bottom are respectively equipped with a silicone gasket (6).
5. PAHs harvesters in a kind of small-sized air as claimed in claim 1, it is characterised in that the sampling filler (7)
For the porous organic composite resins of XAD-2.
6. PAHs harvesters in a kind of small-sized air as claimed in claim 1, it is characterised in that the sampling loading pipe
(8) material is polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401333.6U CN206420682U (en) | 2016-12-20 | 2016-12-20 | PAHs harvesters in a kind of small-sized air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401333.6U CN206420682U (en) | 2016-12-20 | 2016-12-20 | PAHs harvesters in a kind of small-sized air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206420682U true CN206420682U (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621401333.6U Expired - Fee Related CN206420682U (en) | 2016-12-20 | 2016-12-20 | PAHs harvesters in a kind of small-sized air |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589198A (en) * | 2017-06-30 | 2018-01-16 | 杭州医学院 | A kind of method of 16 kinds of polycyclic aromatic hydrocarbons in measure water |
| CN113355373A (en) * | 2021-06-29 | 2021-09-07 | 劲牌持正堂药业有限公司 | Preparation method of low polycyclic aromatic hydrocarbon icaritin |
| CN113740123A (en) * | 2020-05-29 | 2021-12-03 | 同方威视技术股份有限公司 | Hand-held gas sampling device |
| CN114459830A (en) * | 2020-11-09 | 2022-05-10 | 青岛恒远科技发展有限公司 | Portable multipurpose semi-volatile organic matter sampler |
| KR102536496B1 (en) * | 2022-09-30 | 2023-06-01 | 서강대학교 산학협력단 | a passive sampler for measuring concentration of sprayed quaternary ammonium salt in air and a method for measuring concentration of sprayed quaternary ammonium salt using same |
-
2016
- 2016-12-20 CN CN201621401333.6U patent/CN206420682U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589198A (en) * | 2017-06-30 | 2018-01-16 | 杭州医学院 | A kind of method of 16 kinds of polycyclic aromatic hydrocarbons in measure water |
| CN113740123A (en) * | 2020-05-29 | 2021-12-03 | 同方威视技术股份有限公司 | Hand-held gas sampling device |
| CN113740123B (en) * | 2020-05-29 | 2022-10-18 | 同方威视技术股份有限公司 | Hand-held gas sampling device |
| CN114459830A (en) * | 2020-11-09 | 2022-05-10 | 青岛恒远科技发展有限公司 | Portable multipurpose semi-volatile organic matter sampler |
| CN113355373A (en) * | 2021-06-29 | 2021-09-07 | 劲牌持正堂药业有限公司 | Preparation method of low polycyclic aromatic hydrocarbon icaritin |
| KR102536496B1 (en) * | 2022-09-30 | 2023-06-01 | 서강대학교 산학협력단 | a passive sampler for measuring concentration of sprayed quaternary ammonium salt in air and a method for measuring concentration of sprayed quaternary ammonium salt using same |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20171220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |