CN105865891B - A kind of combined apparatus and its application method of internal standard compound release and evolution product enrichment for thermal analyzer - Google Patents
A kind of combined apparatus and its application method of internal standard compound release and evolution product enrichment for thermal analyzer Download PDFInfo
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- CN105865891B CN105865891B CN201610344006.XA CN201610344006A CN105865891B CN 105865891 B CN105865891 B CN 105865891B CN 201610344006 A CN201610344006 A CN 201610344006A CN 105865891 B CN105865891 B CN 105865891B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/405—Concentrating samples by adsorption or absorption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4055—Concentrating samples by solubility techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N2001/4038—Concentrating samples electric methods, e.g. electromigration, electrophoresis, ionisation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4055—Concentrating samples by solubility techniques
- G01N2001/4061—Solvent extraction
Abstract
The present invention relates to the combined apparatus of a kind of internal standard compound release for thermal analyzer and evolution product enrichment, it includes the sampling probe (21) in the release chamber (10) connected by transfer conduit (27) and enrichment chamber (24) and insertion enrichment chamber (24), the release chamber (10) top has the first carrier gas inlet (6), inner mark solution (2) are filled in the release chamber (10), the enrichment chamber (24) lower part has the second carrier gas inlet (25), it is enriched with chamber (24) and is equipped with extract liquor attaching device (18), it is hung with extract liquor drop (17) thereon, being enriched with chamber (24) top has carrier gas outlet (23)；The syringe needle of the sampling probe (21) is located in the extract liquor drop (17) hung on the extract liquor attaching device (18).Enrichment chamber (24) bottom is additionally provided with point discharge device (15).
Description
Technical field
The invention belongs to instrument and equipment fields, and in particular to a kind of internal standard compound release and evolution product for thermal analyzer
The combined apparatus of enrichment.
Technical background
Thermoanalysis technology is the various transformations and reaction of the research material under temperature program(me) control, and such as dehydration, is melted at crystallization
Melt, evaporate, the thermal decomposition process of phase transformation and various inorganic and organic materials and kinetics problem etc., be it is a kind of very
Important analysis test method.As one kind of traditional thermoanalysis technology, thermogravimetric/differential thermal analysis is using thermobalance in program
At a temperature of control, measurement of species quality, one kind of the increase of thermal change quality, mass loss or heat absorption, heat release and temperature relation
Thermoanalysis technology has many advantages, such as that instrumentation is easy, accuracy is high, sensitive quick and sample milligram ammonia, answers extensively
For fields such as inorganic, organic, chemical industry, metallurgy, medicine, food, tobacco, the energy and biologies.
Liquid-phase micro extraction technique is a kind of novel sample proposed in mid-term the 1990s, and rapidly developing
Pretreatment technology.Liquid-phase micro-extraction can provide the sensitivity to compare favourably with classical liquid-liquid extraction, concentration effect even more preferably；
The technology integrates sampling, separation, purifying, concentration, sample introduction, and adapts to complex dielectrics, trace constituent, special nature ingredient
Analysis；It is easy to operate, quick, it is not necessarily to special instruments and equipment；Extraction mode is more, and available organic solvent type is more and dosage
It is about several to tens microlitres few, very large space is provided to optimize the condition of liquid-phase micro-extraction.In building resource-conserving and ring
Today of border friendly society, use is environmentally protective, consumption of organic solvent is small and inexpensive sample-pretreating method is with important
Realistic meaning.The extraction phase of liquid-phase micro-extraction can directly carry out ultraviolet/visible spectrophotometry, fluorescence spectrophotometry, original
Sub- absorptiometry measurement, can also pass through gas chromatograph, high performance liquid chromatograph, efficient capillary electrophoresis apparatus, chromatography-
The modern instruments such as mass spectrometer or capillary electrophoresis-laser-induced fluorescence instrument are analyzed.Liquid-phase micro extraction technique is in environment, food
The fields such as product, drug, active ingredient of Chinese herbs analysis are widely used.Before liquid-phase micro-extraction is as a kind of novel sample
Reason technology, collection sampling, extract and concentrate in one, have many advantages, such as high sensitivity, it is easy to operate, fast it is cheap, obtained
It rapidly develops and is widely applied in numerous areas.
Electrostatic generator mainly generates electrostatic, and output is usually single polarity, and for example positive or negative polarity, output voltage can
To adjust, it is typically used in field of scientific study, electrostatic applies such as electrostatic precipitation, electrostatic spraying, generates electrostatic field for biology
Effect study and other places that apply electrostatic.
Summary of the invention
The present invention provides the combined apparatus of a kind of internal standard compound release for thermal analyzer and evolution product enrichment and its makes
Use method.
It is an object of the invention to escape product analysis for thermal analyzer to provide a kind of effective and feasible combined apparatus, utilize
Internal standard compound release device makes uniformly to carry the internal standard compound component volatilized in carrier gas, produces internal standard compound and evolution using enriching apparatus
Object is adsorbed under the same conditions, extracts, is enriched with, and realizes the qualitative and relative quantification to reaction evolution product and its evolution behavior rule
Rule analysis.
It is an object of the invention to the evolution behaviors of thermal decomposition product in monitoring reaction course, provide for complexity thermal chemical reaction
Information more abundant speculates reaction mechanism and target product formation mechanism accordingly, establishes thermal chemical reaction model, to promoting or
The method for inhibiting target product to generate is studied, and carries out thermal chemical reaction under controllable state according to ideal direction.
It is an object of the invention to realize to continuous enrichment, the sampling of thermal chemical reaction evolution product, filled using the combination
It sets to cooperate with autosampler and realizes the analysis such as thermal analyzer and gas chromatography-mass spectrum, liquid chromatography-mass spectrography, Capillary Electrophoresis
The automatic sampling of instrument detects.
First aspect present invention provides the combination dress of a kind of the internal standard compound release for thermal analyzer and evolution product enrichment
It sets comprising discharge chamber 10 and the enrichment chamber 24 connected by transfer conduit 27 and be located at the 24 top sample tap of enrichment chamber
Sampling probe 21 in 20, the transfer conduit 27 connect 10 top of release chamber and 24 lower part of enrichment chamber；First carrier gas
Entered after the release chamber 10 purges the liquid level 11 for discharging the inner mark solution 2 in chamber 10 by the first carrier gas inlet 6 and is passed through
The transfer conduit 27 enters the enrichment chamber 24, takes with what the second carrier gas inlet 25 by enrichment 24 lower part of chamber entered
Thermal analyzer carrier gas mixing with sample to be tested evolution product, the mixed carrier gas of formation purge extract liquor in the enrichment chamber 24
From 23 evolution of carrier gas outlet after extract liquor drop 17 on attaching device 18；The syringe needle of the sampling probe 21 is located at the extract liquor
In the extract liquor drop 17 hung on attaching device 18.
In a preferred embodiment of the present invention, 10 top of release chamber, which has, to be equipped with institute with movable partition 9, lower part
Inner mark solution 2 is stated, the liquid level of the inner mark solution 2 is had by first sensor 5 with connection by liquid surface height controlling device 4
The first fluid discharge pump 3 control of first fluid reservoir 1 of the inner mark solution 2 and the release chamber 10；9 bottom surface of partition and
The liquid level of the inner mark solution 2 determines the region of carrier gas purge；Carrier gas enters the release chamber 10 by the first carrier gas inlet 6
Gas flow is controlled by gas flow controller 7.
In a preferred embodiment of the present invention, the sample tap 20 on enrichment 24 top of chamber is close by 22 institute of sealing ring
Envelope, the delivery pipe 19 of 20 lower part of the sample tap connection conveying extract liquor, 19 lower end of delivery pipe connects the extract liquor support
Adsorption device 18, the sampling probe 21 penetrate and enter the extract liquor attaching after passing through the sealing ring 22 and the delivery pipe 19
In the extract liquor drop 17 hung on device 18；The shape of the extraction drop 17 is passed by droplet profile controller 14 by second
Sensor 5a and the second of the delivery pipe 19 for connecting the second fluid reservoir 1a for having the extraction solution 13 and the conveying extract liquor
Fluid discharge pump 3a control；Point discharge device 15 is arranged at 24 lower part of enrichment chamber, and the point discharge device 15 connects outside
Electrostatic generator 26；The Way in that the transfer conduit 27 enters the enrichment chamber 24 is diagonal upward direction.
In a preferred embodiment of the present invention, the release chamber 10 and the enrichment chamber 24 and the transfer conduit 27
Temperature controlled by temperature controller 12.
Second aspect of the present invention provides the combination dress of a kind of the internal standard compound release for thermal analyzer and evolution product enrichment
The application method set comprising following steps:
A prepares inner mark solution, is added in the first fluid reservoir 1；
B prepares extraction solution, is added in the second fluid reservoir 1a after filtering；
C is put into sample to be tested into thermal analyzer, is arranged heat analysis condition, the heat analysis condition include: initial temperature,
Final temperature, temperature program, experiment atmosphere, carrier gas flux, sample size, reference substance；
D is that release chamber 10 selects carrier gas, and carrier gas flux is arranged by gas flow controller 7, adjusts 9 height of partition；
E starts liquid surface height controlling device 4, determines 2 liquid level of inner mark solution in release chamber 10；
F start-up temperature controller 12 determines the temperature of release chamber 10 and the enrichment chamber 24 and the transfer conduit 27；
G starts droplet profile controller 14, determines the shape of 17 drop of extract liquor drop in enrichment chamber 24；
Simultaneously voltage is arranged in h starting electrostatic generator 26, determines the discharge effect of point discharge device 15；
I starts thermal analyzer temperature program, records the thermal analysis curve of test sample；
J selects multiple time points or temperature spot, and sampling probe 21 is penetrated sample tap 20 and is extracted across sealing ring 22 and conveying
The delivery pipe 19 for taking liquid, make syringe needle be located at extract liquor attaching device 18 and hang extraction drop 17 in, extract extract liquor and by its
It is transferred in chromatography column feed materials bottle, is analyzed；
K acquires heat analysis data.
In a preferred embodiment of the present invention, the inner mark solution 2 is prepared by internal standard compound and solvent, the internal standard compound tool
There is volatility.
In a preferred embodiment of the present invention, the carrier gas into the release chamber 10 and carrying sample to be tested escape product
Thermal analyzer carrier gas it is identical or different, into it is described release chamber 10 carrier gas maximum flow be purging 2 liquid of inner mark solution
Drop is not splash when face.
In a preferred embodiment of the present invention, the carrier gas and carrying sample to be tested evolution into the release chamber 10
The thermal analyzer carrier gas of product is inert gas.
In a preferred embodiment of the present invention, the extract liquor is that a kind of solvent or several solvents are formulated, institute
State the analysis detection for not interfering pyrolysis evolution product of the component of extract liquor.
The invention has the characteristics that:
1, using carrier gas purge inner mark solution liquid level, make uniformly to carry the internal standard compound component volatilized in carrier gas, be enriched with chamber
So that internal standard compound and pyrolysis evolution product are extracted, are enriched under the same conditions, qualitative and phase is carried out to the pyrolysis evolution product of reaction
To Quantitative Study.
2, by adjusting the divider height for discharging chamber in internal standard compound release device, reach to carrier gas purge inner mark solution liquid level
The accurate control of effect, liquid surface height controlling device ensures the stabilization of liquid level, to realize the essence of internal standard compound content in carrier gas
Really adjusting and stability contorting.
3, the collective effect that enrichment chamber is absorbed using Electrostatic Absorption and/or droplet extraction, flows through and is enriched in the carrier gas of chamber
Internal standard component and pyrolysis evolution product are enriched in drop, extract drop using sampling probe, and device has easy, quickly, efficiently
The advantages of, it is convenient to be combined with analysis instruments such as gas chromatography-mass spectrum, liquid chromatography-mass spectrography, Capillary Electrophoresis.
4, droplet profile controller monitors droplet size in real time, it is ensured that drop has excellent in shape, and sampling probe is according to reality
Drop can be extracted at any time by testing needs, realize that cooperating with autosampler can be achieved combination to the continuous sampling of reaction evolution product
The automatic sampling of analysis instrument detects.
5, the heat analysis data reacted using thermal analyzer obtains reaction ease using the device and combined analytical instrument
The qualitative and relative quantitation information of product and its evolution Behavior law out can speculate that reaction mechanism and target product generate machine accordingly
Reason studies the method for promoting or target product being inhibited to generate, makes thermal chemical reaction under controllable state according to ideal
Direction carries out.
6, the combined apparatus also can be used for the extraction of volatile component in gas, enrichment, only need to be by under test gas via second
Carrier gas inlet is passed through enrichment chamber, can carry out the qualitative and relative quantitative assay of volatile component in gas.
Detailed description of the invention
Fig. 1 is the combined apparatus figure of internal standard compound release and the evolution product enrichment for thermal analyzer of the invention.
Appended drawing reference in Fig. 1 are as follows: the 1-the first fluid reservoir；The second fluid reservoir of 1a-；2-inner mark solutions；3-the first liquid
Flow pump；3a-second liquid flow pump；4-liquid surface height controlling devices；5-first sensors；5a-second sensor；6—
First carrier gas inlet；7-gas flow controllers；8-carrier gas flow direction；9-partitions；10-release chambers；11-liquid levels；12-temperature
Spend controller；13-extract liquors；14-droplet profile controllers；15-point discharge devices；16-mixed carrier gas flow direction；17—
Extract liquor drop；18-extract liquor attaching devices；19-delivery pipes；20-sample taps；21-sampling probes；22-sealing rings；
23-carrier gas outlet；24-enrichment chambers；25-the second carrier gas inlet；26-electrostatic generators；27-transfer conduits.
Fig. 2 is the thermogravimetric of fresh coffee beans powder of the invention, differential thermal curve figure.
Fig. 3 is the total ion chromatogram comparison that fresh coffee beans powder of the invention escapes product in different temperature zones.
Fig. 4 is the comparison of internal standard compound peak area in each temperature section total ion chromatogram of the invention.
Fig. 5 is the evolution behavior of reaction evolution product of the invention.
Specific embodiment
Further to illustrate technical means and efficacy of the invention, below in conjunction with attached drawing and preferred embodiment, to foundation
The combined apparatus application of internal standard compound release and evolution product enrichment proposed by the present invention for thermal analyzer and embodiment are detailed
It is carefully described as follows, but the contents of the present invention are not limited to this.
Embodiment: thermal analyzer-evolution product enrichment-gas chromatography-mass spectrography research green coffee bean powder end pyrolysis produces
The evolution behavior of object
The thermobalance sensitivity that thermal analyzer is arranged is 1 μ g, accurately weighs the fresh coffee beans powder of 100.00 ± 0.05mg
Sample, which is put into the crucible of thermal analyzer, carries out thermogravimetric test.Temperature programming condition are as follows: with the heating rate of 10 DEG C/min, from 40
900 DEG C DEG C are heated to, 10min is kept.Carrier gas is air, flow 200mL/min.
As shown in Fig. 2, fresh coffee beans powder sample thermogravimetric, differential thermal obtained in 40 DEG C to 400 DEG C Temperature Programmed Processes
Curve graph.Find out from hot weight curve, the thermochemical reaction process that sample occurs does not have apparent plateau, and reaction is continuous
The not apparent divided stages carried out.Thermogravimetric curve and corresponding tangent line are found using the biggish second step of mass loss
Thermal process reactor is divided into three phases by crosspoint: first stage mass loss speed is more slow, the sample before 215 DEG C
Quality loss is 9.13%；It is second stage from 215 DEG C to 343 DEG C, sample quality reduces 42.32% again, bent from differential thermal
Find out that there is obvious heat release behavior in the stage in line；Be the phase III from 343 DEG C to 400 DEG C, sample weight loss speed slow down but
Higher than the first stage, which reduces 9.73%.
The combined apparatus that product enrichment is discharged and escaped using internal standard compound, according to 20 in 100 DEG C to 400 DEG C temperature-rise periods
DEG C interval divides temperature section sampling enrichment thermal analyzer and escapes product, and is separated, analyzed to it by gas chromatograph-mass spectrometer,
It is as shown in Figure 3 to choose the evolution product total ion chromatogram that wherein 5 temperature sections obtain.Confirmed using mass spectrum library searching each
Compound corresponding to chromatographic peak, the compound in figure at retention time 5.0min is internal standard compound used in combined apparatus, respectively
The peak height of temperature section internal standard compound is relatively；Remaining compound is the evolution product of thermal chemical reaction, it is seen that each temperature section evolution
There are larger differences for the component of product.
It is illustrated in figure 4 the comparison of internal standard compound peak area in each temperature section total ion chromatogram, the temperature value of abscissa
The initial temperature of corresponding relevant temperature section, it is therefore seen that concentration effect of the internal standard compound in drop is by droplet profile micro-variations
Etc. factors influence and time changing.The enrichment process of internal standard compound and evolution product in drop is simultaneous, drop shape
The factors such as shape micro-variations are identical to influence caused by the two.The use of internal standard compound makes different temperature zones evolution product
Relative amount is provided with comparativity, eliminates the shadow that the factors such as droplet profile micro-variations calculate evolution product relative amount
It rings.Can correct and calculate using internal standard compound peak area pyrolysis evolution product different temperature zones relative amount situation of change,
Obtain more structurally sound evolution behavior curve.The relative quantification letter of target product can be further obtained in conjunction with heat analysis data
Breath.
As shown in figure 5, depicting the evolution by taking the compound in total ion chromatogram at retention time 9.5min as an example
Evolution behavior of the product in 100 DEG C to 400 DEG C temperature-rise periods, ordinate are that compound peaks area is corrected through internal standard compound peak area
Ratio afterwards, the temperature value of abscissa correspond to the initial temperature of relevant temperature section.The evolution product confirms through mass spectrum library searching
For pyridine, find out that it occurs mainly with 260~280 DEG C and 280~300 DEG C of two temperature sections from evolution behavior curve, with 280
~300 DEG C of temperature ranges are main evolution section.
Claims (7)
1. a kind of combined apparatus of internal standard compound release and evolution product enrichment for thermal analyzer, which is characterized in that it includes
It discharges chamber (10) and the enrichment chamber (24) connected by transfer conduit (27) and is located at enrichment chamber (24) top sample tap
(20) sampling probe (21) in, the transfer conduit (27) connect under the release chamber (10) top and the enrichment chamber (24)
Portion；First carrier gas is molten into the internal standard in release chamber (10) purging release chamber (10) by the first carrier gas inlet (6)
The liquid level (11) of liquid (2) afterwards by the transfer conduit (27) enter the enrichment chamber (24), with pass through the enrichment chamber (24)
What the second carrier gas inlet (25) of lower part entered carries the thermal analyzer carrier gas mixing of sample to be tested evolution product, the mixing of formation
Carrier gas exports after the extract liquor drop (17) in enrichment chamber (24) on purging extract liquor attaching device (18) from carrier gas
(23) it escapes；The syringe needle of the sampling probe (21) is located at the extract liquor drop (17) hung on the extract liquor attaching device (18)
In；
Release chamber (10) top has and the inner mark solution (2) can be housed with movable partition (9), lower part, and the internal standard is molten
The liquid level of liquid (2) has the inner mark solution (2) by first sensor (5) and connection by liquid surface height controlling device (4)
The first fluid reservoir (1) and it is described release chamber (10) the first fluid discharge pump (3) control；Partition (9) bottom surface and described
The liquid level of inner mark solution (2) determines the region of carrier gas purge；First carrier gas enters the release chamber by the first carrier gas inlet (6)
(10) gas flow is controlled by gas flow controller (7)；
The sample tap (20) on described enrichment chamber (24) top is sealed by sealing ring (22), and sample tap (20) lower part connects
The delivery pipe (19) of conveying extract liquor is connect, delivery pipe (19) lower end connects the extract liquor attaching device (18), described to take
Sample needle (21) penetrates and passes through the sealing ring (22) and the delivery pipe (19) enters the extract liquor attaching device (18) afterwards
In the extract liquor drop (17) of upper suspension；The shape of extraction drop (17) is passed by droplet profile controller (14) by second
Sensor (5a) and connection have the second fluid reservoir (1a) of the extraction solution (13) and the delivery pipe of the conveying extract liquor
(19) second liquid flow pump (3a) control；Point discharge device (15) are arranged at enrichment chamber (24) lower part, and the tip is put
Electrostatic generator (26) outside electric installation (15) connection；The transfer conduit (27) enters the entrance side of enrichment chamber (24)
To for diagonal upward direction.
2. combined apparatus according to claim 1, which is characterized in that the release chamber (10) and the enrichment chamber (24) with
And the temperature of the transfer conduit (27) is controlled by temperature controller (12).
3. a kind of combined apparatus for being discharged as described in claim 1 for the internal standard compound of thermal analyzer and escaping product enrichment
Application method, which is characterized in that itself the following steps are included:
A prepares inner mark solution, is added in the first fluid reservoir (1)；
B prepares extraction solution, is added in the second fluid reservoir (1a) after filtering；
C is put into sample to be tested into thermal analyzer, and heat analysis condition is arranged, and the heat analysis condition includes: initial temperature, terminates
Temperature, temperature program, experiment atmosphere, carrier gas flux, sample size, reference substance；
D is that release chamber (10) selects the first carrier gas, and carrier gas flux is arranged by gas flow controller (7), it is high to adjust partition (9)
Degree；
E starts liquid surface height controlling device (4), determines inner mark solution (2) liquid level in release chamber (10)；
F start-up temperature controller (12) determines release chamber (10) and chamber (24) and the transfer conduit (27) of being enriched with
Temperature；
G starts droplet profile controller (14), determines the shape of extract liquor drop (17) drop in enrichment chamber (24)；
Simultaneously voltage is arranged in h starting electrostatic generator (26), determines the discharge effect of point discharge device (15)；
I starts thermal analyzer temperature program, records the thermal analysis curve of test sample；
J selects multiple time points or temperature spot, and sampling probe (21) is penetrated sample tap (20) across sealing ring (22) and is conveyed
The delivery pipe (19) of extract liquor makes syringe needle be located at extract liquor attaching device (18) and hangs in extraction drop (17), extracts extraction
Liquid is simultaneously transferred into chromatography column feed materials bottle, is analyzed；
K acquires heat analysis data.
4. application method according to claim 3, which is characterized in that the inner mark solution (2) is matched by internal standard compound and solvent
System, the internal standard compound have volatility.
5. application method according to claim 3, which is characterized in that enter it is described release chamber (10) carrier gas and carry to
Sample escape product thermal analyzer carrier gas it is identical or different, into it is described release chamber (10) carrier gas maximum flow be
Drop is not splash when purging inner mark solution (2) liquid level.
6. application method according to claim 5, which is characterized in that described to enter the carrier gas for discharging chamber (10) and take
Thermal analyzer carrier gas with sample to be tested evolution product is inert gas.
7. application method according to claim 3, which is characterized in that the extract liquor is a kind of solvent or several solvents
It is formulated, the analysis detection for not interfering pyrolysis evolution product of the component of the extract liquor.
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| CN106248469B (en) * | 2016-10-31 | 2024-04-02 | 钟曼匀 | Liquid drop continuous micro-extraction device capable of automatically supplementing and collecting liquid drops and extraction method |
| CN108593487B (en) * | 2018-04-02 | 2020-09-15 | 云南中烟工业有限责任公司 | Thermogravimetric analysis method for identifying safe temperature window of low-temperature cigarette |
| CN109060869A (en) * | 2018-10-15 | 2018-12-21 | 海南红塔卷烟有限责任公司 | Instillation micro-extraction device and method for thermal analyzer evolution component analysis |
| CN113447589B (en) * | 2021-06-30 | 2023-08-01 | 界首市好味来食品有限公司 | Multifunctional food quality detection platform |
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| CA2526439C (en) * | 2003-05-23 | 2010-11-23 | Perkinelmer Las, Inc. | Method for verifying the integrity of thermal desorption sampling tubes |
| US7360394B2 (en) * | 2004-08-03 | 2008-04-22 | Parekh Dhirajlal G | Multi-purpose modular pyrolysis and thermal processing system for chemical and biological threat agent detection |
| CN102042992B (en) * | 2010-10-12 | 2013-06-05 | 红塔烟草(集团)有限责任公司 | Thermal analyzer for material pyrolysis behavior and flowing carrier gas-single-drop microextraction combined device and using method thereof |
| CN104415675B (en) * | 2013-09-09 | 2017-05-17 | 中国科学院大连化学物理研究所 | Method for dynamically preparing VOCs (volatile organic compounds) online at high precision |
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