CN107328886A - The sampling device of on-line chromatographic analysis system and the method that sample is handled using it - Google Patents
The sampling device of on-line chromatographic analysis system and the method that sample is handled using it Download PDFInfo
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- CN107328886A CN107328886A CN201610279123.2A CN201610279123A CN107328886A CN 107328886 A CN107328886 A CN 107328886A CN 201610279123 A CN201610279123 A CN 201610279123A CN 107328886 A CN107328886 A CN 107328886A
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- 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
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
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- 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
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- 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
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
- G01N2030/3023—Control of physical parameters of the fluid carrier of temperature using cryogenic fluids
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- 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
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
- G01N2030/3053—Control of physical parameters of the fluid carrier of temperature using resistive heating
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The method that sample is handled the invention discloses a kind of sampling device of on-line chromatographic analysis system and using it, the device includes sample introduction pipeline, testing sample and chromatographic tubular passageway are connected, it is themselves directly heated and/or cooled down to realize the processing to testing sample during testing sample is conveyed；Thermocouple, is connected with sample introduction pipeline and controller, the temperature for measuring the sample introduction pipeline；Controller, the temperature value of the sample introduction pipeline obtained according to the requirement of the mass transfer of testing sample and measurement controls the temperature adjustment to the sample introduction pipeline.The device ensure that the enrichment of different molecular quantity of material, quick release, while pipeline heat insulation is uniform, it is to avoid residual of the test substance before chromatograph is entered, and improve the precision of detection.
Description
Technical field
The invention belongs to geological sample constituent analysis field, more particularly to a kind of sampling device of on-line chromatographic analysis system
And the method that sample is handled using it.
Background technology
Chromatogram analysis method is a kind of efficient chemical analysis method, has been widely used in the constituent analysis of geological sample.
, it is necessary to by pipeline by the incoming chromatograph of test substance, claim for some can not realize that material prepares the sample of pre-treatment
Be on-line analysis.
In existing on-line chromatographic analysis system and analysis method, generally use heater strip coiling transmission line and carry out
Heat transfer has reached the effect of heating, while additional heat-insulation layer, such as the Pyroprobe series of products of CDS companies of the U.S..Its
The subject matter of presence is, on the one hand, heater strip is simultaneously again as thermocouple, and temperature is only capable of representing the temperature of heater strip, and
The actual temperature of transmission line can not be reflected；On the other hand, the mode of heater strip winding heat transfer can not ensure in whole transmission line
On temperature it is uniform, therefore cause to be very easy to the presence of " cold spot " in system, so cause testing sample enter chromatograph it
Preceding residue problem is serious, influences practical effect；3rd, heater strip is easily broken off and causes instrument damage；4th, it is existing
Device can not realize the function of material freeze enrichment and heat transfer simultaneously, in the wider sample of analyzing molecules amount distribution
When, easily cause the phenomenon of chromatographic peak hangover caused by the difference due to the different molecular weight mass transfer time.
To sum up, need badly and existing on-line chromatographic analysis system is proposed new heating and transmission means to solve its temperature control
Uneven, the inaccurate sample carryover issues caused of system, while the effect of analysis can be improved by realizing after material collection.
The content of the invention
One of technical problems to be solved by the invention be need to be improved existing on-line chromatographic analysis system with
Solve the uneven sample carryover issues caused of its temperature control and can not be enriched with and heat lacking for transmission while realizing and freezing
Fall into.
In order to solve the above-mentioned technical problem, embodiments herein provide firstly a kind of entering for on-line chromatographic analysis system
Sampling device, including sample introduction pipeline, connection testing sample and chromatographic tubular passageway, its quilt during testing sample is conveyed
Directly heat and/or cool down to realize the processing to testing sample；Thermocouple, is connected with sample introduction pipeline and controller, is used for
Measure the temperature of the sample introduction pipeline；Controller, the sample introduction obtained according to the requirement of the mass transfer of testing sample and measurement
Temperature adjustment of the temperature value control of pipeline to the sample introduction pipeline.
Preferably, in addition to dc source, it is connected with the controller with sample introduction pipeline, according to the finger of the controller
Make sample introduction pipeline described in heat stepwise.
Preferably, the sample introduction pipeline be linear pattern tubular passageway, the sample introduction pipeline close to testing sample sample introduction
Mouth is provided with the input or output end of dc source, and chromatographic outlet is provided with direct current in the sample introduction pipeline
The output end or input in source to form loop between the sample introduction pipeline and dc source, using in loop with the sample introduction
The corresponding resistance of pipeline produces fuel factor heating testing sample.
Preferably, the input of at least one pair of dc source is provided between the injection port and outlet of the sample introduction pipeline
End and output end, the input and output end of the dc source respectively the output end of the dc source adjacent thereto with other and
Input forms loop to realize the heat stepwise to the sample introduction pipeline.
Preferably, in addition to cooling unit, it is connected with the controller and sample introduction pipeline, is added according to the instruction of controller
It is downloaded to the sample introduction pipeline or is unloaded from the sample introduction pipeline.
Preferably, the sample introduction pipeline is the tubular passageway with least one U-bend, in the pipe of each U-bend
Shape passage portion is configured with a cooling unit to realize the enrichment of testing sample.
Preferably, it is being respectively arranged with multipair direct current with the tubular passageway part not comprising U-bend comprising U-bend
The input and/or output end in source are to form multiple heating circuits.
Preferably, when the sample introduction pipeline has multiple U-bends, distinguish corresponding to the cooling unit of each U-bend
Different temperature is set to realize segmentation enrichment and the extraction of testing sample.
Preferably, making the material of the sample introduction pipeline includes metal.
Embodiments herein additionally provides a kind of side of the sampling device processing sample of utilization on-line chromatographic analysis system
Method, including loading cooling unit；Testing sample is cooled down to the first temperature value set using cooling unit, is enriched with testing sample
In the tubular passageway of the U-bend；Unload cooling unit；Testing sample is heated to the second temperature set using dc source
Angle value, makes testing sample discharge into analytical instrument.
Compared with prior art, one or more of such scheme embodiment can have the following advantages that or beneficial effect
Really：
By using the sample introduction pipeline of metal material, and by loading DC current or on U-tube road to sample introduction pipeline
Part loading coolant, heat stepwise and/or cooling are carried out to pipeline, it is ensured that being enriched with of different molecular quantity of material, fast quick-release
Put, while pipeline heat insulation is uniform, it is to avoid residual of the test substance before chromatograph is entered, improve the precision of detection.
Other advantages, the target of the present invention, and feature will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.The target and other advantages of the present invention can be wanted by following specification, right
Structure specifically noted in book, and accompanying drawing is asked to realize and obtain.
Brief description of the drawings
Accompanying drawing is used for providing to the technical scheme of the application or further understanding for prior art, and constitutes specification
A part.Wherein, the accompanying drawing of expression the embodiment of the present application is used for the technical side for explaining the application together with embodiments herein
Case, but do not constitute the limitation to technical scheme.
Fig. 1 is the structural representation of the sampling device of the on-line chromatographic analysis system according to first embodiment of the invention；
Fig. 2 is the structural representation of the sampling device of the on-line chromatographic analysis system according to second embodiment of the invention；
Fig. 3 is the structural representation of the sampling device of the on-line chromatographic analysis system according to third embodiment of the invention；
Fig. 4 is the flow of the method for the sampling device processing sample using the on-line chromatographic analysis system of the embodiment of the present invention
Schematic diagram；
Fig. 5 is the structural representation of the sampling device of the on-line chromatographic analysis system according to fourth embodiment of the invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the present invention is applied whereby
Technological means solves technical problem, and reaches the implementation process of relevant art effect and can fully understand and implement according to this.This Shen
Each feature that please be in embodiment and embodiment, can be combined with each other under the premise of not colliding, the technical scheme formed
Within protection scope of the present invention.
The present invention sampling device can realize uniformly, the heating effect without cold spot, hydrocarbons can be solved from sample
The residue problem that source enters during gas-chromatography progress component analysis.First describe in detail in conjunction with specific embodiments.
Embodiment one：
As shown in figure 1, sampling device is used to connect testing sample and chromatograph, including sample introduction pipeline 11, thermocouple 12, control
Device 13 and dc source 14 processed.
Specifically, sample introduction pipeline 11 connects testing sample (such as sample cell) and chromatograph (such as capillary chromatograph respectively
Deng), it is the passage for conveying test substance.Sample introduction pipeline is line style tubular passageway always, during testing sample is conveyed, and is led to
Cross and directly the tubular passageway is heated to ensure the transmission of different boiling compound.
Sample introduction pipeline 11 is made up of uniform metal material (such as stainless steel), can conduct electric current, and due to sample feeding pipe
Road 11 itself has certain resistance, and after connecting into current loop, the sample introduction pipeline 11 can produce fuel factor, release
Heat, for being heated to the testing sample wherein conveyed.
Due to the uniformity of sample introduction pipeline 11, therefore the effect heated using it is in the length side of whole tubular passageway
To being uniform with radially, therefore the sample introduction pipeline 11 in the present embodiment can improve testing sample is heated and is incubated
Uniformity, and then be effectively prevented from the problem of the residual of testing sample, solving with caused by because heating is uneven in the prior art
The material residual determined in on-line chromatographic analysis.
Thermocouple 12 is connected with sample introduction pipeline 11, the temperature for measuring sample introduction pipeline 11.As shown in figure 1, general by heat
Galvanic couple 12 is arranged at the position of the centre being heated portion of of sample introduction pipeline so that accurate measurement obtains the temperature of pipeline.
In the present embodiment, because sample introduction pipeline 11 is heated object, therefore by thermocouple 12 directly and sample feeding pipe
What road 11 was connected reflection is the actual temperature of sample introduction pipeline 11, and the temperature for obtaining resistance wire can only be measured in the prior art and
The temperature of pipeline can not be accurately obtained, therefore the device of the present embodiment is conducive to improving the precision detected.
Controller 13 is connected with thermocouple 12, receives the measurement data of thermocouple 12, is passed according to the material of testing sample
The temperature control sample introduction pipeline 11 for the sample introduction pipeline 11 that defeated requirement and measurement are obtained carries out temperature adjustment.Specifically include, start
Or heating and holding temperature of the cut-out to sample introduction pipeline 11 etc..For example, by collecting the feedback information of thermocouple 12, temperature is worked as
When degree reaches the temperature value of setting, the cut-out heated current of controller 13.When temperature value of the temperature less than setting, controller 13 connects
Logical heated current starts to heat testing sample.
Dc source 14 is connected with sample introduction pipeline 11, and forming loop is used to heat sample introduction pipeline 11.Such as Fig. 1 institutes
Show, in sample introduction pipeline 11 close to injection port of the one end of testing sample for sample introduction pipeline 11, direct current is provided with injection port
The input (anode) or output end (negative electrode) in source 14, going out in sample introduction pipeline 11 close to chromatographic one end for sample introduction pipeline 11
Sample mouthful, output end (negative electrode) or input (anode), the i.e. direction of heated current of dc source 14 are provided with sample outlet position
The effect of heating is not interfered with.
Dc source 14 is typically using low-voltage, the form of high current, it can be ensured that the high speed of heating and safety.Also pass through
The speed of the regulation heating of controller 13.Adjust dc source 14 using controller 13, output current, electric current is bigger, heating speed
Rate is higher, realizes the adjustable of the rate of heat addition.
The sampling device of the embodiment of the present invention can effectively improve in on-line chromatographic analysis the efficiency of heating surface of transmission line and
Uniformity.
Embodiment two：
In the present embodiment, the arbitrary portion using dc source 14 in sample introduction pipeline 11 constitutes current loop, Jin Ershi
Now to the heat stepwise of testing sample.
As shown in Fig. 2 being additionally provided with the input of a pair of dc sources between the injection port and outlet of sample introduction pipeline 11
End and output end.If being already provided with the input of dc source at the injection port of sample introduction pipeline 11, the input and position
The output end of dc source between injection port and outlet constitutes current loop, and positioned between injection port and outlet
The input of dc source then constitutes another current loop with the output end of the dc source of the sample outlet position of sample introduction pipeline 11,
So, two current loops are formed on whole sample introduction pipeline 11.
Further, if setting the identical or different dc source of multiple magnitudes of voltage respectively inside dc source 14,
And two current loops are powered respectively using above-mentioned dc source.Then adjusted and connected into each time respectively by controller 13
The size of the output current of the power supply on road, it is possible to realize the heat stepwise of sample introduction pipeline.
It should be noted that the input for the dc source being arranged between the injection port of sample introduction pipeline 11 and outlet and
Output end is not limited to a pair, can be multipair.
The sampling device of the present embodiment realizes the heat stepwise to testing sample, disclosure satisfy that the test request of complexity,
Extend the field of chromatography.
Embodiment three：
In the present embodiment, the enrichment of testing sample is realized by changing sample introduction pipeline in local shape.
As shown in figure 3, one section of sample introduction pipeline 11 be the structure with U-bend, corresponding to the U-bend pipeline also
It is provided with cooling unit 31.
Cooling unit 31 is connected with controller 13, and under the instruction control of controller 13, cooling unit 31 is loaded into
On the sample introduction pipeline of U-shaped bending, or cooling unit 31 unloaded from the sample introduction pipeline of U-shaped bending.Test substance can be with
It is vaporized after freezing, enrichment and enters chromatograph by heating pipeline at the sample introduction pipeline of U-bend and completes to analyze.
Specifically, before loading heated current, cooling unit 31 is connected on U-bend region first, difference boiling
The material of point can be enriched in the U-shaped region, and sample source sustainable release test substance in this enrichment time.Work as sample
After the substance release in product source is finished, controller 13 disconnects cooling unit 31 and the connection in U-shaped region, while passing through controller 13
Heated current is loaded, being rapidly heated for pipeline is realized.Tube wall is enriched in because test substance is frozen, therefore in heating process
It is heated to be released, into the follow-up pipeline portions for not including U-bend.
Further, can be respectively in the tubular passageway part comprising U-bend with not wrapping the need for according to heat stepwise
Tubular passageway part containing U-bend sets the loop that multistage includes dc source.For example, as shown in figure 3, in sample feeding pipe
The input (anode) or output end (negative electrode) of dc source 14 are provided with the injection port on road 11, in sample introduction pipeline 11 close to color
The sample outlet position of spectrometer is provided with the output end (negative electrode) or input (anode) of dc source 14, in U-bend pipeline and directly
The junction of line style pipeline is provided with the output end (negative electrode) and input (anode) of a pair of dc sources 14, to form two respectively
Individual heating circuit, and thermocouple 12 is set in two loops respectively,.It should be noted that logical in the tubulose comprising U-bend
Road part, its thermocouple is arranged on the position where U-bend.The heating to testing sample just can be so realized simultaneously
And material collection, to meet more complicated test request.
Fig. 4 is the schematic flow sheet of the method handled using above-mentioned sampling device testing sample, as illustrated, bag
Include following steps：
Step S410, loading cooling unit.
Step S420, the first temperature value extremely set using cooling unit cooling testing sample, make testing sample be enriched in U
In the tubular passageway of type bending.
Step S430, unloading cooling unit.
Step S440, using dc source heat testing sample to set second temperature value, make testing sample discharge into
Enter analytical instrument
Cooling unit 31 can use liquid nitrogen cooling tank or liquid nitrogen cooling cup.
Example IV：
In the present embodiment, the structure for the U-bend being arranged on sample introduction pipeline 11 is no longer confined to one, can be many
It is individual, and each U-bend structure is equipped with linear structure according to the testing requirement of testing sample.
As shown in figure 4, sample introduction pipeline 11 is divided into four parts, two U-bend structures and two linear structures
Separately arrange, and cooling unit 31 be respectively arranged with corresponding to two U-bend structures, corresponding to two linear structures with
Dc source 14 forms two current loops respectively.It is possible to further set cooling unit 31 to be different cooling temperature respectively
Degree.
For example, if using liquid nitrogen cup as cooling unit, can simultaneously be tied by the coolant in liquid nitrogen cup
Heated current is closed to realize the condition of different temperatures.Such as mixed proportion of the adjustment liquid nitrogen with other solvents (such as alcohol).
Furthermore it is also possible to the temperature that setting is enriched with enrichment, when temperature is less than setting value, using controller, 13 pairs are entered
The loading current of sample pipeline 11 is heated to it, temperature is risen to setting value.
Sample introduction pipeline in the present embodiment, can be achieved the different temperatures setting in different U-shaped regions, can so meet difference
The segmentation enrichment of the compound of boiling spread, or even some materials (such as polar compound) for being not suitable for chromatography can be detained
Chromatography is not involved in pipeline, the interference to analysis is advantageously reduced, analysis precision is lifted.
In the present embodiment, by setting multiple U-bends on sample introduction pipeline 11, and corresponding to the cold of each U-bend
But unit 31 realizes the extraction respectively to the heterogeneity of testing sample respectively with different temperature cooling sample introduction pipelines 11,
Extracting mode is easy, and extraction efficiency is high.
By the various embodiments described above as can be seen that the present invention on-line chromatographic analysis system sampling device, due to use
New heating and the mode of cooling, improve the high speed of on-line chromatographic analysis device heating and the uniformity of insulation and treat test sample
The material collection of product and extraction.
In the various embodiments described above, because sample introduction pipeline 11 is directly exposed aerial, therefore after the completion of experiment,
Room temperature can be cooled to quickly, it is ensured that safety.
Illustrate the implementation result of the present invention by two examples separately below.
Sampling device using the on-line chromatographic analysis system of the embodiment of the present invention is connected with gas chromatography mass spectrometer, point
It is other that micro-region analysis technique research is carried out to oil gas inclusion and hydrocarbon source rock.
In the analysis experiment of oil gas inclusion, using sampling device as shown in Figure 3, in one end close to testing sample
Sample feeding pipe curved way is into the U-shaped cold-trap as material collection.A set of thermocouple and ampere wires are added simultaneously, U are controlled respectively
The temperature of type pipeline portions and linear pattern pipeline behind, realizes separated regions and carries out temperature controlled twin-channel reality
Effect.Actual conditions is set to：The temperature of linear pattern pipeline is controlled at 300 DEG C all the time, and U-tube road is directly cooled down using liquid nitrogen
Enrichment, then with 12V, 40A dc source carries out being heated to 300 DEG C to type pipeline, about needs the time of 1 minute.Material quilt
U-tube Lu Zhonghou is enriched in, is discharged into by subsequent heat in analytical instrument.
In the experiment of hydrocarbon source rock micro- cracking analysis, using sampling device as shown in Figure 1, rear portion is by sample introduction needle by sample introduction
The outlet of pipeline and the injection port of gas chromatograph are directly connected to, equally using 12V, and 40A dc source is to sample introduction pipeline
Directly heat, temperature is maintained at 300 DEG C.
Apparatus of the present invention are a kind of sampling device of on-line chromatographic analysis, are particularly suitable for the microcell point of petroleum geology sample
Analysis, is directly heated with direct current to pipeline, with it is quick and uniform the characteristics of, it is low to solve efficiency in on-line chromatographic analysis,
The material residual that the unfavorable factors such as non-uniform temperature are caused, improves analysis precision.
Although disclosed herein embodiment as above, described content is only to facilitate understanding the present invention and adopting
Embodiment, is not limited to the present invention.Any those skilled in the art to which this invention pertains, are not departing from this
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of sampling device of on-line chromatographic analysis system, including：
Sample introduction pipeline, connection testing sample and chromatographic tubular passageway, it is directly added during testing sample is conveyed
Heat and/or cool down to realize the processing to testing sample；
Thermocouple, is connected with sample introduction pipeline and controller, the temperature for measuring the sample introduction pipeline；
Controller, is controlled to institute according to the requirement of the mass transfer of testing sample and the temperature value for measuring the obtained sample introduction pipeline
State the temperature adjustment of sample introduction pipeline.
2. device according to claim 1, it is characterised in that also including dc source, with the controller and sample feeding pipe
Road is connected, and the sample introduction pipeline is heated according to the instruction segment of the controller.
3. device according to claim 2, it is characterised in that the sample introduction pipeline is linear pattern tubular passageway, described
Sample introduction pipeline is provided with the input or output end of dc source close to the injection port of testing sample, close in the sample introduction pipeline
Chromatographic outlet is provided with the output end of dc source or input with the shape between the sample introduction pipeline and dc source
Into loop, fuel factor heating testing sample is produced using resistance corresponding with the sample introduction pipeline in loop.
4. device according to claim 3, it is characterised in that set between the injection port and outlet of the sample introduction pipeline
Be equipped with the input and output end of at least one pair of dc source, the input and output end of the dc source respectively with other with
The output end and input of its adjacent dc source form loop to realize the heat stepwise to the sample introduction pipeline.
5. device according to claim 2, it is characterised in that also including cooling unit, is connected with the controller, root
The sample introduction pipeline is loaded into according to the instruction of controller or is unloaded from the sample introduction pipeline.
6. device according to claim 5, it is characterised in that the sample introduction pipeline is with least one U-bend
Tubular passageway, is configured with a cooling unit to realize the enrichment of testing sample in the tubular passageway part of each U-bend.
7. device according to claim 6, it is characterised in that lead to comprising U-bend with the tubulose not comprising U-bend
Road part is respectively arranged with the input and/or output end of multipair dc source to form multiple heating circuits.
8. the device according to claim 6 or 7, it is characterised in that when the sample introduction pipeline has multiple U-bends,
Different temperature is respectively set to realize segmentation enrichment and the extraction of testing sample corresponding to the cooling unit of each U-bend.
9. device according to claim 1, it is characterised in that making the material of the sample introduction pipeline includes metal.
10. a kind of sampling device processing sample of on-line chromatographic analysis system using as any one of claim 6 to 8
Method, including：
Load cooling unit；
Testing sample is cooled down to the first temperature value set using cooling unit, testing sample is enriched in the U-bend
In tubular passageway；
Unload cooling unit；
Testing sample is heated to the second temperature value set using dc source, testing sample is discharged into analytical instrument.
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| CN113433084A (en) * | 2021-06-23 | 2021-09-24 | 一念传感科技(深圳)有限公司 | Gas pool and detection device for high-temperature gas measurement |
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