CN204832126U - SVOC gives off performance parameters's device in spot test material - Google Patents
SVOC gives off performance parameters's device in spot test material Download PDFInfo
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- CN204832126U CN204832126U CN201520466040.5U CN201520466040U CN204832126U CN 204832126 U CN204832126 U CN 204832126U CN 201520466040 U CN201520466040 U CN 201520466040U CN 204832126 U CN204832126 U CN 204832126U
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- svoc
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- spme
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- 239000000463 material Substances 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 title abstract description 8
- 238000002470 solid-phase micro-extraction Methods 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 claims abstract description 3
- 230000003068 static effect Effects 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract description 7
- 238000005070 sampling Methods 0.000 abstract description 5
- 239000005416 organic matter Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000704 physical effect Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 abstract 2
- 229910001220 stainless steel Inorganic materials 0.000 description 16
- 239000010935 stainless steel Substances 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- XNGIFLGASWRNHJ-UHFFFAOYSA-N o-dicarboxybenzene Natural products OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000005350 fused silica glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- -1 phthalic acid ester compounds Chemical class 0.000 description 2
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- 239000010453 quartz Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004803 Di-2ethylhexylphthalate Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
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- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
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- 238000003795 desorption Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
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- 239000003063 flame retardant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Polymers C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 description 1
- 229940088597 hormone Drugs 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 1
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a SVOC gives off performance parameters's device in spot test material belongs to SVOC ( semi -volatile organic matter) physical property detection area. The device includes two fixed plates, two identical material, four kinds of parts in a ring and a plurality of solid phase micro -extraction appearance including SVOC, the structural symmetry of constituteing down just is the platykurtic to at the airtight static cylindrical experiment chamber of the inside construction of ring, this method is for to arrange testing arrangement in constant temperature environment, and age in the back pricks experiment chamber to a plurality of SPME appearance (Software project management(SPM) E), adsorb the sample, according to different situations, carry out the initial analysis to SVOC's among different sampling time's the SPME adsorbance respectively, linear match obtains in material SVOC's the performance parameters that gives off to the test result. This device is simple, and is easy and simple to handle, this measuring method need not to consume a large amount of pure air, need not to measure air mass flow, and can be able to fast, accurately survey in the material SVOC give off performance parameters.
Description
Technical field
The utility model belongs to semi-volatile organic matter (SVOC) physical property detection field, particularly to the measurement mechanism of SVOC emission characteristics, for the emission characteristics parameter of SVOC in test material.
Background technology
Comfortable, the healthy and work efficiency of indoor air quality appreciable impact people, more and more receives the concern of people.In recent decades, semi-volatile organic matter (english abbreviation SVOC) is widely used in all kinds of indoor composite chemical material and goods thereof, the fire retardant PBBs etc. in such as, plasticizer phthalic acid ester compounds in plastic products, Building Fire Protection material and electronic product.These indoor materials and goods can distribute SVOC in room air, cause IAQ (indoor air quality) to worsen, are detrimental to health.Research shows, SVOC Human body package is the major reason causing the diseases such as endocrine hormone imbalance, asthma in children, allergic, mankind spermatozoon vigor decline, inborn defect.But, indoor SVOC is polluted still lack relevant control strategy and governing measure at present.This is owing to being at present still in the starting stage to the research of the aspects such as the source emission characteristics of indoor SVOC, transport property and intervention control in the world.And as indoor SVOC transport property and the basis of intervening control etc., quick, the Accurate Determining of SVOC source emission characteristics are again the most important things.
Existing research shows, the SVOC emission characteristics of indoor material can characterize with a characterisitic parameter, i.e. the SVOC concentration of material surface and air interface place air side.This characterisitic parameter is typically expressed as y
0, conventional unit is μ g/m
3.Due to the content usual very high (greatly account for 10% of material gross mass) of SVOC in indoor material, and the emission rate of SVOC is extremely low, even if through long time, also only has the SVOC of minute quantity to depart from source material; For the dissemination process of plasticizer phthalic acid two (2-ethyl) the own ester (vehicle economy HP) in vinyl floor, even if through 1 year distribute, also only have the DEHP of 0.003% to depart from vinyl floor.Therefore, within considerable time, distribute temperature if given, y
0a constant can be regarded as.How to measure y quickly and accurately
0also the key measuring material SVOC emission characteristics has just been become.
Existing measurement y
0device normally put into containing the material of SVOC the cool compartment that is used for measuring volatile organic matter characteristic, pass to air, in exit by TenaxTA pipe monitoring SVOC concentration change, air in Laboratory Module is needed to be managed by TenaxTA with certain flow during the sampling of TenaxTA pipe, SVOC in air-flow is made to be adsorbed in adsorbent in TenaxTA pipe, until SVOC concentration reaches balance in Laboratory Module; Utilize the emission model of SVOC in Laboratory Module to carry out matching to the concentration recorded, thus try to achieve y
0.Because cool compartment has very large internal surface area, and SVOC is easy to by various adsorption, and it is even longer that the time that in Laboratory Module, SVOC phase concentrations reaches balance is generally some months.By Optimal Experimental cabin structure, make the distributing area maximization of SVOC material in Laboratory Module and Laboratory Module inwall adsorption area minimizes, SVOC phase concentrations can be made to reach time shorten to 2 ~ 5 day of balance, thus greatly shorten minute.But, this kind of cool compartment method, need the pure air of at substantial, experimental cost is high; Need the additional facilities such as configuration supply air line, gas meter, sample lines, sampling pump, experimental system and experimental implementation are all comparatively complicated; In addition, y
0sVOC equilibrium concentration, convective transfer coefficient h
mwith the function of Laboratory Module ventilation Q, and h
mcan only be estimated by experimental formula, reduce y to a certain extent
0the accuracy of result.In brief, still lacking one at present can quick, Accurate Determining SVOC material emission characteristics parameter y
0apparatus and method.
Solid-phase microextraction instrument (SPME) is developed the beginning of the nineties in last century, due to its without the need to solvent, sampling quantity is little, structure is simple, the advantage such as easy to operate, be widely used at present in solid-state, liquid, gaseous organic substance concentration determination.The structural representation of SPME, as shown in Figure 1.SPME is similar to syringe, and this device comprises an extracting head 1, stainless steel inner core 2, stainless steel needle tubing 3, rotating head 4 and a sealing gasket 5.Extracting head is a fused quartz fiber scribbling Stationary liquid extraction coating, and quartz fibre one end connects stainless steel inner core, and stainless steel inner core outer sleeve stainless steel needle tubing is not fractureed to protect quartz fibre.Stainless steel inner core stretches out from the other end of needle tubing, and connects a rotating head (for being connected with automatic sampler), extracting head can be made flexible in needle tubing by sliding rotary head.The ultimate principle of SPME is adsorbed onto in the coating of extracting head by the object in sample, then by the adsorbance of desorption evaluating objects thing.Compared with TenaxTA pipe, the advantage of SPME is that structure is simple, easy to operate, and without the need to passing to the mensuration that constant gas can realize SVOC concentration.But, rarely have the example measuring gas phase SVOC concentration with SPME at present.
Utility model content
The purpose of this utility model is the weak point in order to overcome existing apparatus, proposes the device and method of SVOC emission characteristics parameter in a kind of Fast Measurement material.This device adopts sealed cabin structure, and without the need to measurement gas flow, structure is simple, easy to operate, for measuring the SVOC emission characteristics parameter y of different materials
0provide and stablize adjustable condition; Experimental period shortens greatly, and in Laboratory Module, SVOC equilibrium concentration is y
0, there is higher accuracy.
The utility model solves the technical scheme that its technical matters adopts:
In Fast Measurement material, a device for SVOC emission characteristics parameter, is characterized in that, this device comprises two fixed heads, two pieces of identical materials containing SVOC, an annulus and n solid-phase microextraction instrument four kinds of parts, and n is the multiple of 2; Described annulus is placed in the middle of two block of material, and two fixed heads are placed on the opposite side of two block of material respectively, and each parts are closely connected mutually, and one-piece construction is symmetrical in flat up and down; Two block of material separate by described annulus, and build airtight static cylindrical Laboratory Module in annulus inside; The thickness of annulus and the ratio <0.05 of internal diameter, to guarantee the surface area ratio >10 distributing area and circle ring inner wall in the source of distributing; The sidewall distance upper and lower surface equal-height position of annulus has n aperture, and solid-phase microextraction instrument penetrates Laboratory Module by aperture, realizes the measurement to SVOC concentration in Laboratory Module.
The beneficial effects of the utility model are, 1) adopt airtight Laboratory Module, and without the need to the pure air of at substantial, can experimental cost be reduced, and the error that measurement air flow rate is introduced can be avoided; 2) adopt SPME to detect SVOC concentration, without the need to the extras such as sampling pump, sample lines, experimental system and experimental implementation are simplified all greatly; 3) in Laboratory Module, SVOC concentration reaches the stable time and only needs 2 hours, far below more than 2 days of existing device, greatly can shorten the test duration; 4) annular radii is large, thickness is little, thus SVOC material distribute the adsorption area of area much larger than circle ring inner wall, circle ring inner wall can be left in the basket to the suction-operated of SVOC; 5) structure is simple, easy to operate, can repeatedly reuse.
Accompanying drawing explanation
Fig. 1 is the structural representation of the solid-phase microextraction instrument that the utility model uses;
Fig. 2 is the apparatus structure schematic diagram of SVOC emission characteristics parameter in a kind of Fast Measurement material of the present utility model;
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is described in detail.
The device example structure schematic diagram of SVOC emission characteristics parameter in the Fast Measurement material that the utility model proposes, as shown in Figure 2.Whole device is flat right cylinder.This device comprises annulus 6, is positioned at the central authorities of whole device, and diameter is little (the external diameter 42cm of thickness greatly, internal diameter 40cm, thickness 2cm), can be surface flatness higher, not containing SVOC and the material lower to SVOC adsorptive power, as stainless steel, glass, glass fibre etc.; Two pieces of source to be measured emitting materials 7, are cut into the circle of diameter 42cm, and all kinds of indoor materials that can be containing different SVOC (but must for tabular, other shapes are not suitable for this device), as the vinyl floor, wallpaper etc. of plasticizer-containing, totally two pieces, be respectively placed in the side of annulus; Fixed head 8 (diameter 42cm), totally two pieces, the material higher by levelness is made (such as stainless steel, glass fibre etc.), one piece of fixed head is respectively placed in the outside of two pieces of source materials to be measured, pressure is applied outside fixed head, the each several part of device is closely connected, and the cavity in annulus inside forms the Laboratory Module of relative closure, intercept external air flow to the impact of air in Laboratory Module; Multiple solid-phase microextraction instrument 9 (having 8 in embodiment), for SVOC concentration in test experience cabin.The perisporium distance upper and lower surface equal-height position of annulus evenly has several aperture (having 8 in embodiment), aperture is communicated with the surfaces externally and internally of annulus, diameter is slightly larger than the stainless steel needle tubing of SPME, to guarantee that the stainless steel needle tubing of SPME can penetrate in Laboratory Module from aperture, and the impact of external air flow on air in Laboratory Module can be intercepted.
The extracting head of the solid-phase microextraction instrument SPME that the present embodiment is used selects dimethyl silicone polymer (Polydimethylsiloxane, PDMS) as coating.As shown in Figure 1, the SPME extracting head Stationary liquid extraction coating that the present embodiment is selected is the PDMS of 7 μm, extracting head fused quartz fibre length 1cm, diameter 110 μm; The diameter of SPME stainless steel inner core 2 300 μm; The diameter of stainless steel needle tubing 3 600 μm, sealing gasket 5 (diameter is about 2.6mm) is about 5.7cm to the length of stainless steel needle tubing 3 end.Therefore, when the stainless steel needle tubing of SPME penetrates (namely sealing gasket 3 is completely by the outer wall of annulus 6) in Laboratory Module completely, the extracting head of SPME and the distance of annulus 6 inwall are greater than 2cm, and can ensure that whole extracting head is exposed to SVOC concentration is y
0air in.The diameter of the aperture that annulus 6 sidewall is opened should be greater than 600 μm, but should not too greatly (should be less than the diameter of sealing gasket 9), and in the present embodiment, the diameter of aperture is 1mm.
The course of work of the utility model device is: after this device has been assembled, and is placed in isoperibol, ensures that the temperature of whole test process is consistent.This device can make SVOC be come out by material surface when not disturbing by external air flow condition, and in Laboratory Module free diffusing.After SVOC distributes from the source surface of distributing, free diffusing in the air of annulus 6 inside.When the inwall SVOC suction-operated of annulus 6 can be ignored (because adsorption area is much smaller than distributing area), through after a period of time (about 2 hours), except the inside surface place (within distance inside surface 2cm) near annulus, in Laboratory Module, in most of air, the concentration of SVOC will keep constant, and equal y
0.During mensuration, penetrated in Laboratory Module by SPME by the aperture of annulus sidewall, and SPME extracting head is stretched out the stainless steel needle tubing of SPME, extracting head is exposed in Laboratory Module in air completely, the SVOC in air can be adsorbed in SPME extracting head coating.After a period of time of setting, extracting head is retracted in SPME stainless steel needle tubing, take out SPME again, needle tubing is inserted in gas chromatograph-mass spectrometer (GC-MS) injection port at once, again extracting head is released from needle tubing, then run the adsorbance of SVOC in GC-MS analytical extraction head coating.By measuring adsorbance corresponding to different adsorption time, it being carried out to the linear fit of initial point, the slope of straight line can be determined; Utilize this slope and binding isotherm formula, can y be determined
0.
Claims (1)
1. the device of SVOC emission characteristics parameter in Fast Measurement material, is characterized in that, this device comprises two fixed heads, two pieces of identical materials containing SVOC, an annulus and n solid-phase microextraction instrument four kinds of parts, and n is the multiple of 2; Described annulus is placed in the middle of two block of material, and two fixed heads are placed on the opposite side of two block of material respectively, and each parts are closely connected mutually, and one-piece construction is symmetrical in flat up and down; Two block of material separate by described annulus, and build airtight static cylindrical Laboratory Module in annulus inside; The thickness of annulus and the ratio <0.05 of internal diameter, to guarantee the surface area ratio >10 distributing area and circle ring inner wall in the source of distributing; The sidewall distance upper and lower surface equal-height position of annulus has n aperture, and solid-phase microextraction instrument penetrates Laboratory Module by aperture, realizes the measurement to SVOC concentration in Laboratory Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520466040.5U CN204832126U (en) | 2015-07-01 | 2015-07-01 | SVOC gives off performance parameters's device in spot test material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520466040.5U CN204832126U (en) | 2015-07-01 | 2015-07-01 | SVOC gives off performance parameters's device in spot test material |
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| Publication Number | Publication Date |
|---|---|
| CN204832126U true CN204832126U (en) | 2015-12-02 |
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ID=54689713
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520466040.5U Withdrawn - After Issue CN204832126U (en) | 2015-07-01 | 2015-07-01 | SVOC gives off performance parameters's device in spot test material |
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| CN (1) | CN204832126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931639A (en) * | 2015-07-01 | 2015-09-23 | 清华大学 | Apparatus and method for rapid determination of radiation characteristic parameter of SVOC in material |
-
2015
- 2015-07-01 CN CN201520466040.5U patent/CN204832126U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931639A (en) * | 2015-07-01 | 2015-09-23 | 清华大学 | Apparatus and method for rapid determination of radiation characteristic parameter of SVOC in material |
| CN104931639B (en) * | 2015-07-01 | 2016-06-29 | 清华大学 | The device and method of SVOC emission characteristics parameter in a kind of quick mensuration material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151202 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |