CN110286171A - VOCs spot sampling system and rapid detection method in a kind of soft furniture - Google Patents
VOCs spot sampling system and rapid detection method in a kind of soft furniture Download PDFInfo
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- CN110286171A CN110286171A CN201910616697.8A CN201910616697A CN110286171A CN 110286171 A CN110286171 A CN 110286171A CN 201910616697 A CN201910616697 A CN 201910616697A CN 110286171 A CN110286171 A CN 110286171A
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 84
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000001179 sorption measurement Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000005416 organic matter Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 36
- 238000000034 method Methods 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- -1 benzene class Chemical class 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/025—Gas chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
- G01N2030/201—Injection using a sampling valve multiport valves, i.e. having more than two ports
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (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
VOCs spot sampling system in a kind of soft furniture, including sampler, clean gas feed system, flowmeter, heater, circulating-heating temperature control loop, VOCs quick analytic instrument；First interface, second interface and third interface are offered on sampler；Clean gas feed system is connect with first interface, and flowmeter and heater are set between clean gas feed system and first interface；Circulating-heating temperature control loop is connected between second interface and third interface, including circulating pump, the first threeway, intermediate triple valve, VOCs adsorption filtration pipe, the second threeway, heating temperature control means；VOCs quick analytic instrument is connect with the first threeway.VOCs rapid detection method in a kind of soft furniture is also provided.Overall structure of the present invention is simple, at low cost, and it is convenient to operate, and detection cycle is short, is able to achieve the quick detection of VOCs in soft furniture product.Circulating-heating temperature control loop makes the gas in sampler keep mutually synthermal, ensure that the consistency of on-site test condition and the comparativity of testing result.
Description
Technical field
The present invention relates to VOCs detection technique fields, and in particular to VOCs spot sampling system and fast in a kind of soft furniture
Fast detection method.
Background technique
Currently, sample is typically sent to reality in relation to the detection method of formaldehyde and volatile organic matter in building materials, furniture
Test room, detected using climate compartment (also known as environmental chamber) method, in climate compartment can preferably analog sample practical service environment, sample
Formaldehyde and VOCs of the product in climate compartment discharge normal emission rate and rule close to sample, and testing result is more conform with sample
Therefore the practical release situation of product becomes building materials and furniture in reality using the environmental chamber method detection practical VOCs burst size of furniture
Test indoor main test method.
But the composition due to various furniture raw material, manufacturing process and use condition difference are huge, product volume is big, face
Extensively, climate compartment method testing cost is high, the period is long, mainly uses in laboratory, only has part authoritative inspection organization and section at present
It grinds universities and colleges and has climate compartment method detectability.So the detection for furniture item volatile organic compounds is extensive at home
Popularization still has difficulty.It would therefore be highly desirable to carry out suitable for the quick, convenient of China furniture item volatile organic compounds VOCs
Detection technique, method and equipment research.
Summary of the invention
The present invention is in view of the above-mentioned problems, provide VOCs spot sampling system and rapid detection method in a kind of soft furniture.
The purpose of the present invention can be realized by following technical proposals: VOCs spot sampling system in a kind of soft furniture
System, including sampler, clean gas feed system, flowmeter, heater, circulating-heating temperature control loop, VOCs quick analytic instrument；
First interface, second interface and third interface are offered on the sampler；The clean gas feed system by pipeline with
The first interface of sampler connects, and the flowmeter and heater are set between clean gas feed system and first interface
On pipeline；The circulating-heating temperature control loop includes circulating pump, the first threeway, intermediate triple valve, VOCs adsorption filtration pipe, second
Threeway, heating temperature control means, the circulating pump, the first threeway, intermediate triple valve, VOCs adsorption filtration pipe, the second threeway, heating
Temperature control device is sequentially connected between the second interface of sampler and third interface by pipeline, and the intermediate triple valve and
It is direct-connected by pipeline between second threeway；The VOCs quick analytic instrument passes through pipeline and the 1st of circulating-heating temperature control loop the
Lead to and connects.
Further, the sampler is in the hemispherical cover of bottom opening, and the first interface is set to sampler
The top place in side, the second interface are set to the top of sampler, and the other side that the third interface is set to sampler is leaned on
Lower place.
Further, the VOCs quick analytic instrument includes GC-PID detector.
It further, further include computer, the computer is electrically connected with VOCs quick analytic instrument.
VOCs rapid detection method in a kind of soft furniture, using VOCs spot sampling system in above-mentioned soft furniture,
Include the following steps:
(1) sampler is set on the surface of soft furniture, is fitted tightly over the opening of sampler on soft furniture surface,
Confined space is formed inside sampler；
(2) clean gas feed system supplies clean gas, and clean gas is passed through in sampler after flowmeter and heater；
(3) clean gas being passed through in sampler and the gas mixing that soft furniture surface is volatilized are uniform, and in circulating-heating temperature
It controls circulation in loop and keeps temperature；
(4) mixed gas is passed through in VOCs quick analytic instrument, and VOCs quick analytic instrument is to analysing mixed.
Further, further includes: (5) data that VOCs quick analytic instrument is analyzed are transferred to computer and carry out at data
Reason.
Further, in step (2), the temperature of clean gas is heated to 36 ± 2 DEG C by heater.Further, warm
At 36 ± 2 DEG C of degree, sampler is to the adsorption rate of soft furniture volatile organic matter less than 20%.
Further, the pressure in sampler is slightly above atmospheric pressure.
Further, TVOC background concn is no more than 20 μ g/m3, the background concn of any single target volatile organic compounds is not
More than 2 μ g/m3。
Compared with the prior art, the advantages of the present invention are as follows: overall structure is simple, at low cost, operates convenient, detection cycle
It is short, it is able to achieve the quick detection of soft furniture product volatile organic compounds VOCs.And in order to be precisely controlled in sampler
Gas temperature, circulating-heating temperature control loop is increased on sampler, gas in sampler can be made to keep mutually synthermal, guarantor
The consistency of on-site test condition and the comparativity of testing result are demonstrate,proved.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
It is marked in figure as follows:
1 sampler
101 first interfaces
102 second interfaces
103 third interfaces
2 clean gas feed systems
3 flowmeters
4 heaters
5 circulating pumps
6 first threeways
7 intermediate triple valves
8 VOCs adsorption filtration pipe
9 second threeways
10 heating temperature control means
11 VOCs quick analytic instruments
12 soft furnitures.
Specific embodiment
Below in conjunction with the attached drawing specific embodiment that the present invention will be described in detail, those skilled in the art is made to become apparent from geography
How solution practices the present invention.Although describing the present invention in conjunction with its preferred embodiment, these embodiments are
It illustrates, is not intended to limit the scope of the invention.
As shown in Figure 1, VOCs spot sampling system in a kind of soft furniture, including sampler 1, clean gas feed system
2, flowmeter 3, heater 4, circulating-heating temperature control loop, VOCs quick analytic instrument 11.
The sampler 1 is in the hemispherical cover of bottom opening, and sampler 1, which can be used not adsorb and do not discharge volatility, to be had
The stainless steel material of machine object is made, and inner wall is handled through deactivation, and first interface 101, second interface are offered on sampler 1
102 and third interface 103.In the present embodiment, the top place in side that the first interface 101 is set to sampler 1, described second
Interface 102 is set to the top of sampler 1, and the third interface 103 is set to the other side lower part of sampler 1.
The clean gas feed system 2 is connect by pipeline with the first interface 101 of sampler 1,3 He of flowmeter
Heater 4 is set in turn on the pipeline between clean gas feed system 2 and first interface 101.Flowmeter 3 can be according to need
Air velocity is adjusted, control enters the gas flow in sampler 1.Temperature is the important of influence soft furniture surface VOCs release
One of factor, in order to keep the temperature consistency of air inlet gas, the gas for entering sampler 1 is first to heat to rule by 4 pairs of heater
Determine temperature, it is ensured that soft furniture surface VOCs discharges at the same temperature in sampler 1.
The circulating-heating temperature control loop includes circulating pump 5, the first threeway 6, intermediate triple valve 7, VOCs adsorption filtration pipe
8, the second threeway 9, heating temperature control means 10, the circulating pump 5, the first threeway 6, intermediate triple valve 7, VOCs adsorption filtration pipe 8,
Second threeway 9, heating temperature control means 10 by pipeline be sequentially connected to sampler 1 second interface 102 and third interface 103 it
Between, it is direct-connected by pipeline between the intermediate triple valve 7 and the second threeway 9.
The VOCs quick analytic instrument 11 is connect by pipeline with the first threeway 6 of circulating-heating temperature control loop.VOCs is fast
Fast analyzer 6 includes GC-PID detector.GC-PID detector has very high sensitivity to most of organic compounds, almost right
All organic matters have response, and without response or respond very to substance not dissociated in inorganic matter, inert gas or flame etc.
Small, to temperature-insensitive, response is fast, is suitble to the separation of complex sample, is in gas chromatograph detector to hydro carbons (such as benzene class, fourth
Alkane, hexane) a kind of best means of sensitivity, it is widely used in the detection of volatile hydrocarbon and many carbon compounds, because
This is very suitable to the compound test analysis of benzene homologues in furniture, esters, ethers etc..
This sampling system may also include computer, and the computer is electrically connected with VOCs quick analytic instrument 11, computer pair
VOCs quick analytic instrument 11 analyzes obtained data and is calculated, analyzed, saved, backed up.
Surface sweeping method is used before detection, and background concentration in sampler 1 is removed by gas in displacement sampler 1.Through
Test and calculate, after ventilation volume reaches 6 times of 1 capacity of gas production cover, in background air VOCs concentration be reduced to initial value 5% hereinafter,
Basic to be believed that the cleaning for completing background, the air inside sampling system no longer influences the volatile organic matter test knot of sample
Fruit test.
Detection method includes the following steps:
(1) sampler 1 is set on the surface of soft furniture 12, the opening of sampler 1 is made to be fitted tightly over soft furniture 12
On surface, the inside of sampler 1 forms confined space；
(2) clean gas feed system 2 supplies clean gas, and clean gas is passed through sampler after flowmeter 3 and heater 4
In 1, wherein flowmeter 3 adjusts the given flow of control clean gas, and the temperature of clean gas is heated to 36 ± 2 by heater 4
℃；
(3) clean gas being passed through in sampler 1 and the gas mixing that 12 surface of soft furniture is volatilized are uniform, and in circulating-heating
Circulation keeps temperature in temperature control loop；
(4) mixed gas is passed through in VOCs quick analytic instrument 11, and it is specific that VOCs quick analytic instrument 11 carries out VOCs to mixed gas
Component and TVOCs test analysis；
(5) VOCs quick analytic instrument 11 analyzes obtained data and is transferred to computer progress data processing.
Wherein, the calculating of soft furniture surface unit area VOCs burst size: the bottom surface half of sampler 1 is measured and recorded
Diameter calculates base area, which is exactly the VOCs typical release source area of soft furniture acquisition surface.It is surveyed according to the source of release
Fixed VOCs concentration of component and TVOC concentration, divided by the base area of sampler 1, as soft furniture surface unit area VOCs
Each component burst size and unit area TVOC burst size, unit are μ g/m2。
Fmd=VOCs quick analytic instrument reading/π R2
In formula:
Fmd--- soft furniture surface unit area VOCs burst size, unit are μ g/m2；
R --- sampler bottom surface radius, unit m.
The calculating of soft furniture VOCs burst size: the paint film coating area on soft furniture surface, the coating are measured and recorded
The product of the VOCs burst size of area and soft furniture surface unit area, as soft furniture VOCs each component burst size and
TVOC burst size, unit are μ g.
Fmz=Fmd×S
In formula:
Fmz--- furniture VOCs burst size, unit are μ g；
The paint film coating area on S --- soft furniture surface, unit m2。
In addition, to avoid the gaseous contamination by scene, the pressure in sampler 1 should be slightly above atmospheric pressure.Clean gas
Feed system 3 supply clean gas background concn answer it is sufficiently low, should not interfere with release measurement.TVOC background concn should be no more than
20μg/m3, the background concn of any single target volatile organic compounds should be no more than 2 μ g/m3。
The gas flow difference of the air inlet and air outlet of sampler 1 should be less than 5%.
The gas flow of calculating or the measurement of specimen surface and the difference of supply setting value are flowed through in ± 5% range.
When temperature (36 ± 2) DEG C, sampler 1 should be less than 20% to the adsorption rate of volatile organic matter.Temperature refers to being filled with
High pure nitrogen temperature, the purpose of this temperature be in order to guarantee VOCs acquisition controllability, the high pure nitrogen purpose being filled with
It is to maintain positive pressure in collector, prevents outside air from polluting.Adsorption rate is to prevent VOCs from existing to reflect the true burst size of VOCs
Secondary pollution in sampling process.
Adsorption rate calculates: within given time, according in the soft furniture added up in mixed gas in the sampler 1 of measurement
Divided by the amount for the volatile organic matter VOCs being added in sampler 1 in the same time, use 1 subtracts the amount of volatile organic matter
The value is gone, and as a percentage.
It should be pointed out that can also have the embodiment of a variety of transformation and remodeling for the present invention through absolutely proving,
It is not limited to the specific embodiment of above embodiment.Above-described embodiment as just explanation of the invention, rather than to this
The limitation of invention.In short, protection scope of the present invention should include that those are apparent to those skilled in the art
Transformation or substitution and remodeling, and be determined by the appended claims.
Claims (10)
1. VOCs spot sampling system in a kind of soft furniture, which is characterized in that including sampler, clean gas feed system,
Flowmeter, heater, circulating-heating temperature control loop, VOCs quick analytic instrument；
First interface, second interface and third interface are offered on the sampler；
The clean gas feed system is connected by the first interface of pipeline and sampler, the flowmeter and heater setting
On pipeline between clean gas feed system and first interface；
The circulating-heating temperature control loop includes circulating pump, the first threeway, intermediate triple valve, VOCs adsorption filtration pipe, the two or three
Logical, heating temperature control means, the circulating pump, the first threeway, intermediate triple valve, VOCs adsorption filtration pipe, the second threeway, heating temperature
Control device is sequentially connected between the second interface of sampler and third interface by pipeline, and the intermediate triple valve and the
It is direct-connected by pipeline between two threeways；
The VOCs quick analytic instrument is connect by pipeline with the first threeway of circulating-heating temperature control loop.
2. VOCs spot sampling system in soft furniture according to claim 1, which is characterized in that the sampler is in bottom
The hemispherical cover of face opening, the first interface are set to the top place in side of sampler, and the second interface, which is set to, adopts
The top of sample device, the third interface are set to the other side lower part of sampler.
3. VOCs spot sampling system in soft furniture according to claim 1, which is characterized in that the VOCs quickly divides
Analyzer includes GC-PID detector.
4. VOCs spot sampling system in soft furniture according to claim 1 or 2 or 3, which is characterized in that further include meter
Calculation machine, the computer are electrically connected with VOCs quick analytic instrument.
5. VOCs rapid detection method in a kind of soft furniture, which is characterized in that described in any item soft using claim 1 ~ 4
VOCs spot sampling system, includes the following steps: in body furniture
(1) sampler is set on the surface of soft furniture, is fitted tightly over the opening of sampler on soft furniture surface,
Confined space is formed inside sampler；
(2) clean gas feed system supplies clean gas, and clean gas is passed through in sampler after flowmeter and heater；
(3) clean gas being passed through in sampler and the gas mixing that soft furniture surface is volatilized are uniform, and in circulating-heating temperature
It controls circulation in loop and keeps temperature；
(4) mixed gas is passed through in VOCs quick analytic instrument, and VOCs quick analytic instrument is to analysing mixed.
6. VOCs rapid detection method in soft furniture according to claim 5, which is characterized in that further include: (5) VOCs
The data that quick analytic instrument is analyzed are transferred to computer and carry out data processing.
7. VOCs rapid detection method in soft furniture according to claim 5, which is characterized in that in step (2), heating
The temperature of clean gas is heated to 36 ± 2 DEG C by device.
8. VOCs rapid detection method in soft furniture according to claim 7, which is characterized in that at 36 ± 2 DEG C of temperature,
Sampler is to the adsorption rate of soft furniture volatile organic matter less than 20%.
9. VOCs rapid detection method in soft furniture according to claim 5, which is characterized in that the pressure in sampler
Slightly above atmospheric pressure.
10. VOCs rapid detection method in soft furniture according to claim 5, which is characterized in that TVOC background concn
No more than 20 μ g/m3, the background concn of any single target volatile organic compounds is no more than 2 μ g/m3。
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|---|---|---|---|
| CN201910616697.8A CN110286171A (en) | 2019-07-09 | 2019-07-09 | VOCs spot sampling system and rapid detection method in a kind of soft furniture |
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| CN201910616697.8A CN110286171A (en) | 2019-07-09 | 2019-07-09 | VOCs spot sampling system and rapid detection method in a kind of soft furniture |
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Family
ID=68022051
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128097A1 (en) * | 2019-12-25 | 2021-07-01 | 广州禾信仪器股份有限公司 | Vocs traceability detection device, system and method |
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2019
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| WO2021128097A1 (en) * | 2019-12-25 | 2021-07-01 | 广州禾信仪器股份有限公司 | Vocs traceability detection device, system and method |
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Application publication date: 20190927 |