CN115248229A - Research method for atomization agent adsorption capacity in tobacco - Google Patents
Research method for atomization agent adsorption capacity in tobacco Download PDFInfo
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- CN115248229A CN115248229A CN202110465905.6A CN202110465905A CN115248229A CN 115248229 A CN115248229 A CN 115248229A CN 202110465905 A CN202110465905 A CN 202110465905A CN 115248229 A CN115248229 A CN 115248229A
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 111
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 111
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000011160 research Methods 0.000 title claims abstract description 17
- 238000000889 atomisation Methods 0.000 title description 3
- 238000003795 desorption Methods 0.000 claims abstract description 67
- 239000000126 substance Substances 0.000 claims abstract description 27
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 58
- 238000005070 sampling Methods 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 18
- 239000011261 inert gas Substances 0.000 claims description 15
- 239000012159 carrier gas Substances 0.000 claims description 13
- 239000012535 impurity Substances 0.000 claims description 12
- 239000000443 aerosol Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000003463 adsorbent Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000000796 flavoring agent Substances 0.000 claims 1
- 235000019634 flavors Nutrition 0.000 claims 1
- 230000003993 interaction Effects 0.000 abstract description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 62
- 235000011187 glycerol Nutrition 0.000 description 24
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 229920005862 polyol Polymers 0.000 description 9
- -1 polyol compounds Chemical class 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
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- 239000002156 adsorbate Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 2
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 150000001728 carbonyl compounds Chemical class 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000012857 repacking Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
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- 238000004904 shortening Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 235000019505 tobacco product Nutrition 0.000 description 2
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- MLUCVPSAIODCQM-NSCUHMNNSA-N crotonaldehyde Chemical compound C\C=C\C=O MLUCVPSAIODCQM-NSCUHMNNSA-N 0.000 description 1
- MLUCVPSAIODCQM-UHFFFAOYSA-N crotonaldehyde Natural products CC=CC=O MLUCVPSAIODCQM-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- 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
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention provides a research method for the adsorption quantity of a fogging agent in tobacco, which comprises the following steps: selecting tobacco to be detected, introducing an atomizing agent into the tobacco to be detected by using a chemical adsorption instrument to enable the tobacco to be detected to be saturated in adsorption, and measuring a desorption result of the atomizing agent in the tobacco to be detected by using a programmed temperature desorption technology. The research method for the adsorption capacity of the atomizing agent in the tobacco applies a programmed temperature desorption technology to determine the adsorption and desorption angles of the atomizing agent on the surface of the tobacco, and obtains more information about the interaction between the atomizing agent and the tobacco by researching the adsorption and desorption performances of the atomizing agent on the surface of the tobacco.
Description
Technical Field
The invention relates to the field of tobacco, in particular to a research method for the absorption amount of a fogging agent in tobacco.
Background
The moisture content of the tobacco raw material is an important index influencing the sensory comfort, the atomizing agent is a substance with strong capacity of absorbing and keeping moisture from the environment, and at present, polyol compounds such as glycerin and the like are the most widely used atomizing agents in the tobacco industry. Research shows that polyhydric alcohol compounds such as glycerin and the like are transferred into smoke in the smoking process of cigarettes/heated cigarettes, are in positive correlation with the smoke release amount, and are cracked to generate carbonyl compounds such as formaldehyde, acetaldehyde, propionaldehyde, acrolein, crotonaldehyde and the like, and the carbonyl compounds can stimulate the respiratory system and the sense organs of a human body to different degrees.
Current research on the amount of the aerosol in tobacco mainly determines the percentage of the aerosol in the tobacco by measuring the mass of the tobacco and the mass of the aerosol added, and attempts to determine the optimal amount of the aerosol added without the percentage of the aerosol. The method for researching the content of the atomizing agent still belongs to macroscopic research, the capability of the tobacco capable of attaching the content of the atomizing agent cannot be researched from a more microscopic angle, and more data information cannot be obtained, so that the deep research and development of the atomizing agent in the tobacco are hindered.
Disclosure of Invention
The invention provides a research method for the adsorption quantity of a fogging agent in tobacco, which is used for solving the technical problem.
The invention provides a research method for the absorption capacity of a fogging agent in tobacco, which comprises the following steps: selecting tobacco to be detected, introducing an atomizing agent into the tobacco to be detected by using a chemical adsorption instrument to enable the tobacco to be detected to be saturated in adsorption, and measuring a desorption result of the atomizing agent in the tobacco to be detected by using a programmed temperature desorption technology.
The invention provides a research method for the first time, which applies a programmed temperature desorption technology to determine the desorption angle of an atomizing agent on the surface of tobacco and obtains more information about the interaction between the atomizing agent and the tobacco by researching the absorption and desorption performance of the atomizing agent on the surface of the tobacco. The atomizing agent may be, for example, a polyol compound such as glycerin.
The temperature programmed desorption is a method of obtaining a graph of the desorption amount of the adsorbate as a function of temperature by heating the adsorbent having adsorbed the adsorbate according to a predetermined temperature program (for example, constant temperature). The chemical adsorption instrument is utilized, a temperature programmed desorption technology is applied, the reaction condition of the adsorbed molecular atomizing agent and the tobacco solid surface can be inspected in situ, and a plurality of information related to the tobacco surface result can be provided. The temperature programmed desorption technology is very sensitive to physical parameters of the surface of the adsorbate, has high identification capability, and can be used for researching the nature of the surface of a tobacco carrier and the action of different atomizing agents or the nature of the surface of different tobacco carriers and the action of atomization.
The invention utilizes a temperature programmed desorption method to establish a method for detecting the saturated adsorption quantity and desorption quantity of the atomizing agent and the desorption temperature of the atomizing agent in the tobacco raw material, and the detection is rapid. The method has the advantages that the influence factors of the saturated adsorption capacity of the atomizing agent can be known through the experimental results obtained by the temperature programming desorption method, reference is provided for the control of the content of the atomizing agent in the tobacco raw material, and more dimensional information and directions can be provided for the research and development of the tobacco and the atomizing agent.
For example, existing improvements to tobacco and aerosol have focused primarily on the macroscopic level, and the preferred percentage of aerosol added is typically adjusted by observing the moisture uptake and smoke development of the tobacco only by taking different amounts of aerosol added. The effect of the adsorption capacity, surface characteristics, and aerosol properties of the tobacco on the amount added is not known. According to the invention, the interaction between the atomizing agent and the tobacco surface is known by adopting a temperature programmed desorption analysis technology, the influence of the surface condition of the tobacco on the adsorption of the atomizing agent can be explored, and data support is provided for research directions of the pore size, the specific surface area, the surface modification and the like of the tobacco surface. In addition, the adsorption rule of the tobacco sheets prepared by different process materials on the atomizing agent (such as polyol compounds such as glycerol) can be clarified.
And further, deducing the adsorption rule of the tobacco to be detected according to the desorption result. The invention relates to a research method for the adsorption quantity of a fogging agent in tobacco, which can perform desorption measurement after the fogging agent is adsorbed and saturated, thereby obtaining a desorption curve of the fogging agent in tobacco and knowing the desorption rule of the desorption curve.
The chemical adsorption apparatus used for the temperature programmed desorption of the present invention may be a conventional chemical adsorption apparatus, such as a mike adsorption apparatus.
Further, when the tobacco to be detected is subjected to adsorption and desorption measurement, the tobacco to be detected is subjected to pretreatment, namely, the surface of the tobacco is firstly subjected to impurity removal. The concrete method is as follows: adding the tobacco to be detected into a chemical adsorption instrument, introducing inert gas into the tobacco to be detected positioned in the chemical adsorption instrument, and heating the tobacco to be detected, so that impurities adsorbed on the surface of the tobacco to be detected are removed in a heating and inert gas introducing mode. And then taking inert gas as carrier gas, taking the carrier gas carrying an atomizing agent as pretreatment gas, and introducing the pretreatment gas into the tobacco to be detected. Specifically, the chemical adsorption instrument comprises a Loop sample introduction pipe, the preprocessor introduces tobacco to be detected after passing through the Loop sample introduction pipe in the chemical adsorption instrument, and the tobacco to be detected adsorbs an atomizing agent in the pretreatment gas until adsorption saturation. And then starting temperature programming to perform desorption test. In the temperature programmed desorption technique, the carrier gas passes through a U-shaped quartz tube in which the tobacco is placed, and the carrier gas which continuously circulates carries away the atomized agent volatilized by heating in the tube.
The pretreatment step comprises impurity removal and adsorption processes, wherein inert gas is introduced into the tobacco to be detected during impurity removal, and the inert gas and the atomizing agent are introduced into the tobacco to be detected after a period of time to perform the adsorption step, so that the tobacco to be detected is saturated with the atomizing agent, and then the programmed temperature desorption is performed. The time of the whole pretreatment step including impurity removal and adsorption is 25-40min, preferably 30min, and the whole pretreatment step is heated at 140-160 ℃, preferably 150 ℃.
The Loop sample injection tube in the chemical adsorption instrument is also called an annular quantitative sample injection tube, and the volume of the pretreatment gas of each needle is fixed due to the fixed volume.
The inventor finds that the volume of the Loop sampling tube in the chemical adsorption instrument is fixed, so that the volume of the gas entering the tobacco to be detected through the Loop sampling tube is fixed during each sample injection. And the content of the atomizing agent carried in the carrier gas is fixed, so that the content of the atomizing agent introduced into the thermal conductivity detector during each sample introductionThe amount was fixed. It can be seen that the amount of the atomizing agent per sample injection depends on the volume of the Loop sample injection tube. The volume of the existing Loop sampling tube is larger and is 5.0cm 3 Therefore, the sampling saturation is achieved by few times of sampling (1-2 times) in the actual determination process, the accuracy and the sensitivity are reduced, and the measurement result generates larger errors.
Through research and test, the inventor finds that the Loop sampling tube is modified to 0.5-1cm in volume 3 The method is more suitable for measuring the desorption amount of the tobacco surface atomizing agent. Specifically, a Loop sampling tube with a proper volume can be selected according to the content of the atomizing agent of different novel tobaccos. The content of the atomizing agent which is saturated in adsorption on the surface of the tobacco product material can be determined by carrying out sample introduction for more than 5-10 times through the Loop sample introduction pipe on the premise of keeping accuracy and sensitivity, and a simple and effective method is provided for rapidly determining the saturated adsorption quantity of different tobacco raw material materials to the atomizing agent.
Furthermore, because the Loop sample introduction pipe is wound on the cylindrical structure in the chemical adsorption instrument, and two ends of the sample introduction pipe are communicated with the sample introduction valve, the volume of the Loop sample introduction pipe can be reduced by shortening the length of the Loop sample introduction pipe, so that the Loop sample introduction pipe is modified into a shape of 0.5-1cm 3 . Through the mode repacking Loop introduction pipe volume of shortening Loop introduction pipe length, can need not to change other structures in the chemisorption appearance, loop introduction pipe length reduce the back, promptly through around the structural number of turns of cylindricality reduce can, the repacking is convenient.
Specifically, the research method for the adsorbing amount of the fogging agent in the tobacco comprises the following steps: pretreatment: adding the tobacco to be detected into a chemical adsorption instrument, heating, introducing inert gas into the tobacco to be detected for impurity removal, taking the inert gas as carrier gas, taking the carrier gas carrying an atomizing agent as pretreatment gas, and introducing the pretreatment gas into the tobacco to be detected through a Loop sample introduction pipe in the chemical adsorption instrument so as to ensure that the tobacco to be detected reaches adsorption balance; desorption treatment: and carrying out desorption treatment on the adsorbed tobacco to be detected in the atmosphere of inert gas to obtain a desorption curve of the tobacco to be detected. For example, in the temperature programmed desorption technique, a carrier gas is passed through a U-shaped quartz tube in which tobacco is placed, and the carrier gas continuously flowing carries an atomizing agent volatilized by heating in the tube.
Further, the temperature of the pretreatment is 145-155 deg.C, preferably 150 deg.C, and the time of the pretreatment is 25-35min, preferably 30min.
Further, the temperature of desorption treatment is 180-250 ℃, preferably 200 ℃; the desorption time is 90-150min.
According to the method, the saturated adsorption quantity of the atomizing agent on the tobacco to be detected is calculated according to the adsorption balance of the tobacco to be detected, and after the saturated adsorption quantity is obtained, the desorption test can be carried out to obtain a desorption curve.
Further, the inert gas (i.e., carrier gas) may be selected from nitrogen or helium.
Drawings
FIG. 1 shows a schematic view of a chemisorption apparatus of an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a Loop sampling pipe modification according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a Loop sampling pipe connection according to an embodiment of the invention;
figure 4 shows the desorption glycerol versus time profile during temperature programmed desorption of a monoclinic tobacco sample obtained in example 1;
figure 5 shows the desorption glycerol versus time profile during temperature programmed desorption of the monoclinic tobacco sample obtained in example 2.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a chemisorption meter, and fig. 2 shows a Loop sample introduction tube modification schematic diagram. Referring to fig. 1 and 2, in the pretreatment step, the treatment gas in fig. 1 is a gas that enters the reaction tube during the pretreatment process, and is an inert gas used for removing impurities in the pretreatment step. The invention can not use cold trap, also can use cold trap. The cold trap has the effect that in the impurity removal step, the inert gas can take out impurities in the tobacco after passing through the tobacco to be detected, and then the impurities can be adsorbed by the cold trap. In the adsorption process in the pretreatment, carrier gas and the atomizing agent enter the tobacco to be tested through the six-way valve together through pulse gas, the process of adsorbing the atomizing agent by the tobacco is carried out, and the subsequent temperature programmed desorption test is carried out after the adsorption is saturated.
In the desorption treatment step, the pulse gas is a gas, such as helium, which brings the atomizing agent, which is volatilized at a high temperature in the reaction tube heated in the high-temperature furnace, into the Loop sample introduction tube. When sample injection is carried out, the Loop sample injection pipe is connected with the six-way valve, wherein the pulse gas inlet is communicated with the reaction gas inlet, one end of the Loop sample injection pipe is communicated with the pulse gas inlet, and the other end of the Loop sample injection pipe is communicated with the reaction gas inlet. The atomized agent volatilized from the reaction tube at high temperature is injected into the Loop ring through the pulse air inlet, after the Loop ring is full, the Loop ring is communicated with the reaction air inlet, and the volatilized atomized agent is pushed by the reaction gas conveyed by the pipeline to enter a thermal conductivity detector (TCD detector) for analysis.
The reaction gas is a gas which enters the reaction tube during desorption, and is, for example, helium. In other embodiments, other gases capable of chemical reaction can be used as the reaction gas, so as to explore other properties of the tobacco in the reaction tube, and can be used for subsequent further research work.
Fig. 3 shows a Loop sample tube connection schematic. The Loop sampling pipe is wound on the cylindrical structure, and two ends extending out after winding are connected to the sampling valve through fixing nuts respectively. The annular shell is sleeved on the periphery of the cylindrical structure and is fixed through an annular nut. The Loop sample injection pipe of this embodiment is installed in the valve gap at chemisorption appearance top, by ring nut fixed with the mounting panel on, the periphery is protected by annular housing, the ring both ends link to each other with the sample injection valve that has the control by temperature change. The Loop sampling pipe can be replaced according to the requirement of the adsorption capacity. For example, the Loop sampling tube with the reduced length can be replaced, and the specific operation mode is as follows:
1) And (3) confirming that the temperature of the instrument is at the room temperature, setting the temperature of the heating belt to be the room temperature in a manual control mode, and waiting for the instrument to be cooled down.
2) The screw of the upper cover of the chemical adsorption instrument is unscrewed, the upper cover is removed, and the front cover can be pulled forwards.
3) The two fixing bolts of the valve cover are pulled out, and the valve cover can be removed by pulling the valve cover upwards.
4) And (5) moving the valve heat-preservation spacer.
5) And unscrewing the ring nut, taking down the ring shell and unscrewing the middle screw of the Loop sampling tube, thereby taking down the Loop sampling tube.
6) And loosening the clamping sleeve at the head part of the Loop sample injection pipe by using a wrench.
7) And the Loop sampling pipe is lifted upwards, so that the Loop sampling pipe can be taken down from the mounting plate.
8) Installing a new Loop sample inlet pipe, connecting the two ends of the sample inlet pipe with sample inlet valves, and screwing the annular shell 2 by fingers.
9) The Loop sample tube is pressed into place so that it contacts the mounting plate.
10 Screw down Loop sampling tube set screw.
11 Screw down on the housing to secure the new Loop sampling tube.
12 The insulation spacer is re-sized and the valve cover is re-sized.
13 Push the front panel of the chemisorption instrument and cover it.
14 After the Loop is installed, the Loop sample tube is recalibrated to determine the actual volume of the new Loop sample tube.
Example 1
Taking a monoclinic tobacco shred (Hunan C selection) sample as tobacco to be detected, and carrying out N treatment on the sample at 100 DEG C 2 Removing impurities under atmosphere, introducing glycerol for adsorption, naturally cooling to 30 deg.C in sample tube, and heating at a temperature of 10 deg.C/min under N 2 The sample was then warmed to 200 ℃ under atmosphere and held at 200 ℃ for 90min. As can be seen from FIG. 4, the glycerol on the surface of the material is desorbed obviously at 200 ℃, and when the glycerol is desorbed at 200 ℃ for 90min, a clear desorption peak appears.
According to example 1, it can be seen that when the glycerol thermal conductivity detector is desorbed at 200 ℃ for 90min, a clear desorption peak appears, but the TCD signal peak of the glycerol thermal conductivity detector is weaker, so that the desorption time needs to be prolonged for continuous measurement. In addition, since glycerin has a high viscosity, and the desorbed glycerin is easily adsorbed in the pipe of the apparatus, the pretreatment temperature needs to be increased.
Example 2
Still taking a monoclinic cut tobacco sample as an example, the pretreatment and desorption methods are the same as those in example 1, except that the temperature of the pretreatment is raised to 150 ℃, and the temperature is raised to 200 ℃ during the desorption test and then is kept for 120min.
As can be seen from fig. 5, the first desorption peak begins to appear when the temperature of the sample is programmed to 180 ℃, the peak appearance is completed in 20min, the second desorption peak appears in 40-60min, the peak appearance is completed in 100min, and the third desorption peak appears in 100-140 min. The glycerol adsorbed on the surface of the sample has three adsorption modes, the first two glycerol desorption peaks are the physical adsorption of the glycerol on the surface, and the third desorption peak is corresponding to the chemical adsorption of the glycerol.
According to the embodiment, the chemical adsorption and desorption measurement can be carried out on the tobacco sample, so that various information can be obtained, and the specific effects are as follows:
(1) And measuring saturated adsorption amounts of different tobacco raw material sheets to polyol compounds such as glycerin by the modified chemical adsorption instrument, judging when adsorption reaches balance, and calculating the saturated adsorption amounts of the polyol compounds such as glycerin of different tobacco raw material sheets by data fitting treatment.
(2) The adsorption and desorption balance of different tobacco raw material sheets on the polyol compounds such as the glycerol and the like is measured and calculated through the modified chemical adsorption instrument, and the adsorption quantity of the polyol compounds such as the glycerol and the like on the tobacco raw material materials under the conditions of normal temperature and normal pressure is measured.
(3) The change of desorption amount of polyhydric alcohol compounds such as glycerin adsorbed on the surface of the tobacco product material during the temperature programming at 30 ℃ and 350 ℃ is measured by a modified chemical adsorption instrument. The adsorption strength of the polyol compounds such as glycerin on the surface of the tobacco material is judged, and the adsorption and desorption correlation of the polyol compounds such as glycerin on the surface of the tobacco material is analyzed.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
1. A research method for the adsorbing amount of a fogging agent in tobacco is characterized by comprising the following steps: selecting tobacco to be detected, introducing an atomizing agent into the tobacco to be detected by using a chemical adsorption instrument to enable the tobacco to be detected to be saturated in adsorption, and measuring a desorption result of the atomizing agent in the tobacco to be detected by using a programmed temperature desorption technology.
2. The method according to claim 1, wherein the adsorption rule of the tobacco to be tested is inferred from the desorption result.
3. The method of claim 1, wherein the chemical adsorption apparatus comprises a Loop sample tube, and wherein the chemical adsorption apparatus comprises a Loop sample tubeThe volume of the Loop sampling tube is 0.5-1cm 3 。
4. The method for researching the amount of the atomizing agent adsorbed in the tobacco according to claim 3, wherein an original Loop sampling tube in the chemical adsorption apparatus is modified, and the length of the Loop sampling tube is shortened, so that the volume of the Loop sampling tube is reduced to 0.5-1cm 3 。
5. The method for studying the amount of adsorbent of a fogging agent in tobacco according to any one of claims 1 to 4, wherein the method comprises the following steps:
pretreatment: adding the tobacco to be detected into the chemical adsorption instrument, heating, introducing inert gas into the tobacco to be detected for impurity removal, taking the inert gas as carrier gas, taking the carrier gas carrying an atomizing agent as pretreatment gas, and introducing the pretreatment gas into the tobacco to be detected through a Loop sample introduction pipe in the chemical adsorption instrument to ensure that the tobacco to be detected reaches adsorption balance;
desorption treatment: and carrying out desorption treatment on the tobacco to be detected after adsorption in the atmosphere of inert gas to obtain a desorption curve of the tobacco to be detected.
6. The method for studying the amount of the aerosol adsorbed in the tobacco according to claim 5, wherein the temperature of said pretreatment is 145 to 155 ℃ and the time of said pretreatment is 25 to 35min.
7. The method for studying the amount of the tobacco adsorbed with the atomizing agent according to claim 5, wherein the temperature of the desorption treatment is 180 to 250 ℃ and the time of the desorption treatment is 90 to 150min.
8. The method for studying the amount of the tobacco adsorbed with the atomizing agent according to claim 5, wherein the saturation adsorption amount of the atomizing agent on the tobacco to be tested is calculated based on the adsorption equilibrium of the tobacco to be tested.
9. The method of investigating the amount of a flavorant adsorbed in tobacco according to claim 5, wherein the inert gas is nitrogen or helium.
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