CN114113053B - Device and method for detecting oxygen content of tobacco section of cigarette - Google Patents
Device and method for detecting oxygen content of tobacco section of cigarette Download PDFInfo
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- CN114113053B CN114113053B CN202010895842.3A CN202010895842A CN114113053B CN 114113053 B CN114113053 B CN 114113053B CN 202010895842 A CN202010895842 A CN 202010895842A CN 114113053 B CN114113053 B CN 114113053B
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 239000001301 oxygen Substances 0.000 title claims abstract description 160
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 160
- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 82
- 241000208125 Nicotiana Species 0.000 title claims abstract description 75
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 89
- 230000000391 smoking effect Effects 0.000 claims abstract description 83
- 238000001514 detection method Methods 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 34
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 8
- 239000004800 polyvinyl chloride Substances 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000007850 fluorescent dye Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 239000004945 silicone rubber Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- NTVIYASUTONQEE-UHFFFAOYSA-N C(CCC)C=1C=C2C=CC3=CC(=CC4=CC=C(C1)C2=C43)CCCC Chemical compound C(CCC)C=1C=C2C=CC3=CC(=CC4=CC=C(C1)C2=C43)CCCC NTVIYASUTONQEE-UHFFFAOYSA-N 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920006311 Urethane elastomer Polymers 0.000 claims description 3
- 238000011088 calibration curve Methods 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 claims description 3
- 229910000457 iridium oxide Inorganic materials 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 230000003595 spectral effect Effects 0.000 claims 1
- 235000019505 tobacco product Nutrition 0.000 description 8
- 238000005070 sampling Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7769—Measurement method of reaction-produced change in sensor
- G01N2021/7786—Fluorescence
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Abstract
The invention provides a device and a method for detecting the oxygen content of a tobacco section of a cigarette, the detection device comprises a heating cavity, a sealing cavity, a first sealing component, a second sealing component, two oxygen concentration measurement devices, a smoking machine, an air chamber and a processing system. The first and second sealing members are located on opposite end surfaces of the sealed cavity, respectively, during testing, through which the cigarette passes during testing to seal the tobacco segment within the heated cavity and seal a portion of the hollow segment and the filter segment within the sealed cavity. The end of the filter segment is inserted into the smoking machine and connected to the air chamber. One of the two oxygen concentration measuring devices is arranged in the sealed cavity, the other is arranged in the air chamber and is connected with the processing system, so as to receive the detected oxygen concentration and obtain the oxygen content of the tobacco section. The detection device and the detection method are simple to operate and high in accuracy, and can be used for rapidly obtaining the mouth-by-mouth oxygen content of the tobacco section of the heated cigarette in the smoking state.
Description
Technical Field
The invention relates to the field of detection of tobacco products, in particular to a device and a method for detecting the oxygen content of a tobacco section of a cigarette.
Background
Thousands of chemical substances are generated in the burning and sucking process of the cigarettes, wherein part of smoke components have great harm to human health, and various diseases can be possibly caused. The diversification development of tobacco products provides a larger opportunity for heating a novel non-combustible tobacco product. The heating temperature applied by heating the non-combustible cigarettes is generally low, so that the types of harmful ingredients and the release amount are obviously reduced. The harm of cigarettes to human bodies is reduced, and the requirements of smoking people on cigarettes are met, so that the cigarettes are emphasized by consumers. At present, various companies increase the research and development force on novel cigarette smoking sets, but in order to ensure that tobacco is not burnt, the applied heating temperature is generally lower and is not more than 300 ℃, so that the defects of low smoke satisfaction and the like of heating non-burnt tobacco products are caused. Chinese patent application (application number 201911174480.2) proposes a closed heating non-combustible cigarette, which adopts a closed smoking set, and by reducing the oxygen content in cigarettes and properly increasing the heating temperature of the smoking set, tobacco is pyrolyzed to more smoke components, so that the condition of low satisfaction of heating non-combustible novel cigarette products is improved. Therefore, the change of the oxygen content of the tobacco section in the smoking process of the novel heating non-combustion tobacco product has an important influence on solving the problem that the smoke satisfaction of the heating non-combustion tobacco product is not strong. Accordingly, there is a need for an apparatus and method for obtaining mouth-to-mouth oxygen content of tobacco segments by directly detecting the oxygen content.
Disclosure of Invention
In order to solve the problems, the invention provides the device and the method for detecting the oxygen content of the tobacco section of the cigarette by using the device, which are simple to operate, high in accuracy and applicable to novel tobacco products of various specifications, and can quickly obtain the mouth-by-mouth oxygen content of the tobacco section of the heated cigarette in a smoking state. In addition, the detection device and the detection method have strong anti-interference capability, small error and good stability.
According to one aspect of the invention, there is provided a cigarette tobacco segment oxygen content detection device, the cigarette comprising a tobacco segment, a hollow segment and a filter segment that are contiguous in sequence, the cigarette tobacco segment oxygen content detection device comprising a heating cavity, a sealing cavity, a first sealing component, a second sealing component, two oxygen concentration measurement devices, a smoking machine, an air chamber and a processing system, wherein: the first sealing component is detachably arranged on two end surfaces of the heating cavity and the sealing cavity, which are adjacent to each other, and the first sealing component and the second sealing component are respectively detachably positioned on two opposite end surfaces of the sealing cavity during detection, and cigarettes pass through the first sealing component and the second sealing component during detection to seal the tobacco segments in the heating cavity and seal part of the hollow segments and the filter segments in the sealing cavity; the end of the filter tip section outside the sealed cavity is inserted into a smoking machine, and the smoking machine is connected to the air chamber to trap the extracted smoke into the air chamber; and one of the two oxygen concentration measuring devices is arranged in the sealed cavity, the other one is arranged in the air chamber, and each of the two oxygen concentration measuring devices is connected with a processing system which is used for receiving the oxygen concentration detected by the two oxygen concentration measuring devices and obtaining the oxygen content of the tobacco section by processing the oxygen concentration.
Further, the seal cavity may further include an air inlet, a seal cover for closing the air inlet, and first and second hollow section insertion holes formed on opposite end surfaces, respectively, wherein the first hollow section insertion hole is for inserting the first seal member, and the second hollow section insertion hole is for inserting the second seal member.
Alternatively, the sealed cavity may have a volume between 50 mL-10L.
According to one embodiment, each of the first sealing member and the second sealing member may be a sealing ring.
Further, the sealing ring may have a thickness between 0.5mm and 10 mm.
Further, the sealing ring may have a width between 1mm-10 mm.
Alternatively, the first and second sealing members may be made of epoxy, polyvinyl chloride, ethylene propylene diene monomer, silicone, thermoplastic elastomer (TPE), neoprene, or urethane rubber.
According to another embodiment, the two oxygen concentration measuring devices may comprise a micro-probe oxygen sensor.
Further, the micro-probe type oxygen sensor may be a solid state sensor.
In addition, the solid state sensor may have a gas sensor.
Alternatively, the gas sensor may be made of a semiconductor material, a semiconductor composite material, zinc oxide, iridium oxide, and a composite material of optical fiber oxides.
Alternatively, the gas sensor may have a size between 0.1nm and 1 mm.
According to yet another embodiment, the micro-probe oxygen sensor may be a fiber optic oxygen sensor.
Further, the fiber optic oxygen sensor may include a sensitive membrane formed from a matrix material and a fluorescent dye indicator.
Alternatively, the matrix material may comprise one or more of polymethyl methacrylate, polytetrafluoroethylene, cellulose acetate, polyvinyl chloride, polystyrene, or room temperature vulcanized silicone rubber.
Alternatively, the fluorescent dye indicator may comprise one or more of a bis-butylpyrene or Ru (II) bidentate complex.
According to a further embodiment, the two oxygen concentration measuring devices may comprise chromatographic-like or spectroscopic-like measuring devices.
According to an exemplary embodiment, the processing system may further include: a detection circuit connected to each of the two oxygen concentration measurement devices, respectively, to receive the detected oxygen concentration; and the data acquisition system is connected to the detection circuit to acquire and process the data of the oxygen concentration.
According to another aspect of the present invention, there is provided a method for detecting the oxygen content of a tobacco segment of a cigarette by using the above-mentioned apparatus for detecting the oxygen content of a tobacco segment of a cigarette, comprising the steps of:
Inserting the cigarette to be tested into the heating cavity and the sealing cavity through the first sealing component and the second sealing component, so that the tobacco section is sealed in the heating cavity and part of the hollow section and the filter tip section are sealed in the sealing cavity, and at the moment, the air inlet of the sealing cavity is communicated with the atmosphere;
Inserting the end of the filter tip section into a smoking machine, and checking the sealing state of an oxygen content detection device of the cigarette tobacco section;
selecting a puff mode of the smoking machine;
detecting the oxygen concentration of the sealed cavity and the air chamber before smoking by the smoking machine through two oxygen concentration measuring devices, and sending the oxygen concentration to a processing system;
closing the air inlet through a sealing cover and starting the smoking machine to draw;
After the smoking is finished, the sealed cavity detection signal and the air chamber detection signal received by the processing system are waited to be stable, and the sealed cavity detection signal and the air chamber detection signal are processed to respectively obtain the oxygen concentration of the sealed cavity and the air chamber after the smoking machine is smoked; and
The oxygen content of the tobacco section of the cigarette is calculated by the processing system according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
Wherein X is the oxygen content (mL) of the tobacco segment during the suction process; c 1 is the oxygen concentration (%) in the sealed cavity after smoking by the smoking machine; c 2 is the oxygen concentration (%) in the air chamber after smoking by the smoking machine; c 01 is the oxygen concentration (%) in the air chamber before smoking by the smoking machine; c 02 is the oxygen concentration (%) in the sealed cavity before smoking by the smoking machine; v 2 is the volume of the sealed cavity; v 1 is the volume of the air chamber.
According to one embodiment, the step of processing the sealed cavity detection signal and the air chamber detection signal includes converting the sealed cavity detection signal and the air chamber detection signal into oxygen concentrations in the sealed cavity and the air chamber, respectively, after smoking by the smoking machine according to a calibration curve.
According to another embodiment, the step of waiting for the sealing cavity detection signal and the air chamber detection signal received by the processing system to be stable after the pumping is finished comprises the steps of pumping multiple openings according to the volumes of the sealing cavity and the air chamber, opening the sealing cover, and closing the sealing cover for detection until the readings of the two oxygen concentration measuring devices are stable.
Preferably, the cigarettes may be equilibrated for 48 hours at a temperature of 22.+ -. 2 ℃ and a relative humidity of 60.+ -. 5% before being tested, and cigarettes with average mass differences in the range of 5mg are selected for testing.
Alternatively, the pumping mode may include an I SO pumping mode or an HCI pumping mode.
Drawings
The above and other aspects and features of the present invention will become apparent from the following description of embodiments taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a device for detecting the oxygen content of a tobacco segment of a cigarette according to an embodiment of the present invention; and
Fig. 2 is a schematic structural view of a sealed cavity according to an embodiment of the present invention.
Detailed Description
Illustrative, non-limiting embodiments of the present invention are described in detail below with reference to the accompanying drawings, and further illustrate a device and method for detecting the oxygen content of a tobacco segment of a cigarette according to the present invention.
The device for detecting the oxygen content of the tobacco segment of the cigarette is used for detecting the mouth-by-mouth oxygen content of the tobacco segment of the heated cigarette in a smoking state and comprises a heating cavity 1, a sealing cavity 2, a first sealing part 3, a second sealing part 4, two oxygen concentration measuring devices 5, a smoking machine 6, an air chamber 7 and a processing system, wherein the heating cavity is shown in figure 1. The cigarette to be tested generally comprises a tobacco segment 8, a hollow segment 9 and a filter segment 10, which are contiguous in sequence. For example, the heating cavity 1 may adopt one or more of circumferential heating, needle heating and electromagnetic heating.
Specifically, the heating chamber 1 and the sealing chamber 2 are disposed adjacently, and the first sealing member 3 is detachably disposed simultaneously on both end surfaces of the heating chamber 1 and the sealing chamber 2 adjacent to each other, as shown in fig. 1. In addition, the first sealing member 3 and the second sealing member 4 are detachably located on opposite end surfaces of the sealed cavity 2, respectively, during detection. This arrangement is such that when the cigarette passes through the first sealing member 3 and the second sealing member 4 during inspection, the tobacco segment 8 is sealed within the heating chamber 1 so as to be heated and seals the hollow segment 9 and a portion of the filter segment 10 within the sealed chamber 2, thereby constituting a closed inspection arrangement. A portion of the filter segment 10 is located outside the sealed cavity 2 and the end of the segment outside the sealed cavity is inserted into a smoking machine 6, the smoking machine 6 then being connected to a plenum 7 to trap the extracted smoke into the plenum.
One of the two oxygen concentration measuring devices 5 is provided in the sealed cavity 2, the other is provided in the gas chamber 7 for monitoring the oxygen concentration in real time, and each oxygen concentration measuring device 5 is connected to the processing system. The processing system is used for receiving the oxygen concentrations detected by the two oxygen concentration measuring devices and obtaining the oxygen content of the tobacco section by processing the oxygen concentrations. According to an exemplary embodiment, the processing system may further comprise a detection circuit 11 and a data acquisition system 12. The detection circuit 11 is connected to each of the two oxygen concentration measuring devices 5 to receive the detected oxygen concentration in the sealed chamber 2 and the gas chamber 7, respectively, and for example, the detection circuit may be connected to the oxygen concentration measuring devices 5 through an optical fiber 13. The data acquisition system 12 is connected to the detection circuit 11 to perform data acquisition and processing on the oxygen concentration received by the detection circuit, thereby obtaining the oxygen content of the tobacco segment. The device for detecting the oxygen content of the tobacco section of the cigarette is easy to operate, can quickly obtain a detection structure, has strong anti-interference capability, small error and good stability, and can be used for detecting novel tobacco products with various specifications.
According to an embodiment of the present invention, the sealed cavity 2 may further include an air inlet 21, a sealing cover 22 for closing the air inlet 21, and first and second hollow section insertion holes 23 and 24 formed on opposite end surfaces, respectively. The first hollow section insertion hole 23 is used for inserting the first sealing member 3, and the second hollow section insertion hole 24 is used for inserting the second sealing member 24. Preferably, the sealed cavity 2 may have a volume between 50 mL-10L.
Preferably, each of the first sealing member 3 and the second sealing member 4 may be a sealing ring. For example, the sealing ring may have a thickness of between 0.5mm and 10 mm. In addition, the sealing ring may have a width of between 1mm and 10mm, for example. According to one example, the first sealing member 3 and the second sealing member 4 may be made of epoxy resin, polyvinyl chloride, ethylene propylene diene rubber, silicone rubber, thermoplastic elastomer (TPE), neoprene, urethane rubber, or other organic polymer rubber.
According to an alternative embodiment of the invention, the two oxygen concentration measuring devices 5 may comprise micro-probe oxygen sensors. Further, according to one example, the micro-probe oxygen sensor may be a solid state sensor. The solid state sensor may for example have a gas sensor. Alternatively, the gas sensor may be made of a semiconductor material, a semiconductor composite material, a metal oxide material such as zinc oxide, iridium oxide, or a composite material of optical fiber oxides. Preferably, the gas sensor may have a size between 0.1nm and 1 mm. According to another example, the micro-probe oxygen sensor may be a fiber optic oxygen sensor. The fiber optic oxygen sensor may include a sensitive membrane formed from a matrix material and a fluorescent dye indicator. Optionally, the matrix material comprises one or more of polymethyl methacrylate, polytetrafluoroethylene, cellulose acetate, polyvinyl chloride, polystyrene, or room temperature vulcanized silicone rubber. The fluorescent dye indicator may include one or more of bis-butylpyrene or Ru (II) bidentate complexes. The oxygen concentration measuring device may be a chromatographic or other spectroscopic measuring device.
The method for detecting the oxygen content of the tobacco segment of the cigarette according to the present invention will be described below, and the method uses the above-mentioned detecting device for detecting the oxygen content of the tobacco segment of the cigarette, so as to detect the oxygen content of the tobacco segment of the cigarette in the smoking process. Specifically, the method for detecting the oxygen content of the tobacco section of the cigarette according to the invention can comprise the following steps:
Inserting the cigarette to be tested into the heating cavity 1 and the sealing cavity 2 via the first sealing part 3 and the second sealing part 4, so that the tobacco section 8 is sealed in the heating cavity 1 and a part of the hollow section 9 and the filter section 10 is sealed in the sealing cavity 2, and at the moment, the air inlet 21 of the sealing cavity 2 is communicated with the atmosphere;
inserting the end of the filter segment 10 into the smoking machine 6 and checking the sealing state of the cigarette tobacco segment oxygen content detection device;
Selecting a puff mode of the smoking machine 6, which may include, for example, a standard puff mode (ISO puff mode), a canadian deep puff mode (HCI puff mode), or any of the puff modes commonly used in the art;
Detecting the oxygen concentration C 01、C02 before the smoking machine 6 sucks in the sealed cavity 2 and the air chamber 7 by two oxygen concentration measuring devices 5, and sending the oxygen concentration C 01、C02 to a processing system;
closing the air inlet 21 by a sealing cover 22 and starting the smoking machine 6 to draw;
After the smoking is finished, the sealed cavity detection signal and the air chamber detection signal received by the processing system are waited to be stable, and the sealed cavity detection signal and the air chamber detection signal are processed to obtain the oxygen concentration C 1、C2 in the sealed cavity 2 and the air chamber 7 after the smoking machine 6 is smoked respectively; and
The oxygen content of the tobacco section of the cigarette is calculated by the processing system according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
Wherein X is the oxygen content (mL) of the tobacco segment during the suction process; c 1 is the oxygen concentration (%) in the sealed cavity 2 after the smoking machine 6 draws; c 2 is the oxygen concentration (%) in the air chamber 7 after the smoking machine 6 draws; c 01 is the oxygen concentration (%) in the air chamber 7 before the smoking machine 6 draws; c 02 is the oxygen concentration (%) in the sealed cavity 2 before smoking by the smoking machine 6; v 2 is the volume of the sealed cavity 2; v 1 is the volume of the air chamber 7.
In addition, the step of processing the sealed cavity detection signal and the air chamber detection signal may further include converting the sealed cavity detection signal and the air chamber detection signal into oxygen concentrations in the sealed cavity and the air chamber after the smoking machine draws, respectively, according to a calibration curve.
According to one embodiment, the step of waiting for the seal cavity detection signal and the gas chamber detection signal received by the processing system to stabilize after the pumping is finished may further include opening the sealing cover 22 after pumping multiple ports (for example, 3-5 ports) according to the volumes of the seal cavity 2 and the gas chamber 7 until the readings of the two oxygen concentration measuring devices stabilize and then closing the sealing cover 22 for detection.
When testing cigarettes, the sample of cigarettes to be tested may preferably be equilibrated for 48 hours in an environment at a temperature of 22±2 ℃ and a relative humidity of 60±5% before being tested, and cigarettes with average mass differences in the range of 5mg are selected for testing.
Next, two exemplary embodiments according to the present invention will be described.
First exemplary embodiment
And detecting the mouth-by-mouth oxygen content of the tobacco section of the heated non-combustible cigarette with a certain brand under the ISO smoking mode.
1. And (5) preparing and selecting a sample of the cigarette which is not burnt by heating of a certain brand. The cigarette samples are balanced for 48 hours under the environment that the temperature is 22+/-2 ℃ and the relative humidity is 60+/-5%, a plurality of cigarettes are selected, and the average quality is controlled within the range of 5 mg.
2. The sealing ring is made of polyvinyl chloride, and has a thickness of about 1mm and a width of 3mm. The volume of the sealed cavity 2 was 500mL, and the volume of the air chamber 7 was 500mL.
3. The oxygen concentration measuring device 5 in the sealing cavity 2 and the air chamber 7 is calibrated, and a standard curve is drawn.
4. The cigarette is connected with the cigarette tobacco segment oxygen content detection device according to the invention as shown in figure 1, an optical fiber oxygen sensor is arranged at the position of a sampling port 5, and a smoking machine is started to carry out ISO standard mode smoking. Before the smoking machine 6 smokes, the oxygen concentration in the sealed cavity 2 is C 01, the oxygen concentration in the air chamber 7 is C 02, and after the smoking machine 6 smokes, the concentrations in the sealed cavity 2 and the air chamber 7 are C 1、C2 respectively. The results of the experimental data records and the oxygen content of the tobacco segments are shown in table 1.
5. After sucking the 4 ports, the sealing cap 22 is opened, and after the reading of the optical fiber oxygen sensor is stabilized, the measurement is performed.
TABLE 1 variation of mouth-to-mouth oxygen content of tobacco segments in ISO draw mode
Second exemplary embodiment
And detecting the mouth-by-mouth oxygen content of the tobacco section of the heated non-combustible cigarette with a certain brand under the ISO smoking mode.
1. And (5) preparing and selecting a sample of the cigarette which is not burnt by heating of a certain brand. The cigarette samples are balanced for 48 hours under the environment that the temperature is 22+/-2 ℃ and the relative humidity is 60+/-5%, a plurality of cigarettes are selected, and the average quality is controlled within the range of 5 mg.
2. The sealing ring is made of polyvinyl chloride, and has a thickness of about 0.5mm and a width of 5mm. The volume of the sealed cavity 2 was 300mL, and the volume of the air chamber was 300mL.
3. Calibrating a chromatograph, and drawing a standard curve.
4. The cigarette is connected with the cigarette tobacco segment oxygen content detection device according to the invention as shown in figure 1, a chromatographic sampling port is inserted into the sampling port 5, and a smoking machine 6 is started to carry out the smoking in an ISO standard mode. Before the smoking machine 6 smokes, the oxygen concentration in the sealed cavity 2 is C 01, the oxygen concentration in the air chamber 7 is C 02, and after the smoking machine 6 smokes, the air chamber 6 is kept stand for 60 seconds, and the oxygen concentrations in the sealed cavity 2 and the air chamber 7 are respectively C 1、C2. The results of the experimental data records and the oxygen content of the tobacco segments are shown in table 2.
5. After sucking 3 ports, the sealing caps 22, 120s were opened, and the measurement was performed.
TABLE 2 variation of mouth-to-mouth oxygen content of tobacco segments in ISO draw mode
Although exemplary embodiments of the present invention have been described, it will be apparent to those skilled in the art that variations may be made in these embodiments without departing from the spirit and principles of the invention, the scope of which is defined in the claims and their equivalents.
Claims (23)
1. The utility model provides a cigarette tobacco section oxygen content detection device, the cigarette includes tobacco section, cavity section and the filter tip section that adjoins in proper order, cigarette tobacco section oxygen content detection device includes heating cavity, sealed cavity, first sealing member, second sealing member, two oxygen concentration measurement devices, smoking machine, air chamber and processing system, wherein:
The first sealing component is detachably arranged on two end faces of the heating cavity and the sealing cavity, which are adjacent to each other, and the first sealing component and the second sealing component are respectively detachably positioned on two opposite end faces of the sealing cavity during detection, and the cigarettes pass through the first sealing component and the second sealing component during detection so as to seal the tobacco segments in the heating cavity and seal part of the hollow segments and the filter segments in the sealing cavity;
The end of the filter segment outside the sealed cavity is inserted into the smoking machine, and the smoking machine is connected to the air chamber to trap the extracted smoke into the air chamber; and
One of the two oxygen concentration measuring devices is arranged in the sealed cavity, the other one is arranged in the air chamber, and each of the two oxygen concentration measuring devices is connected to the processing system, the processing system is used for receiving the oxygen concentrations detected by the two oxygen concentration measuring devices and obtaining the oxygen content of the tobacco section by processing the oxygen concentrations, and the processing system calculates the oxygen content of the tobacco section of the cigarette according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
Wherein X is the oxygen content (mL) of the tobacco segment during the suction process; c 1 is the oxygen concentration (%) in the sealed cavity after smoking by the smoking machine; c 2 is the oxygen concentration (%) in the air chamber after smoking by the smoking machine; c 01 is the oxygen concentration (%) in the air chamber before smoking by the smoking machine; c 02 is the oxygen concentration (%) in the sealed cavity before smoking by the smoking machine; v 2 is the volume of the sealed cavity; v 1 is the volume of the air chamber.
2. The apparatus for detecting the oxygen content of a section of tobacco of a cigarette according to claim 1, wherein the sealed cavity further comprises an air inlet, a sealing cover for closing the air inlet, and first and second hollow section insertion holes formed on opposite end surfaces, respectively, wherein the first hollow section insertion hole is for inserting the first sealing member, and the second hollow section insertion hole is for inserting the second sealing member.
3. The apparatus according to claim 1 or 2, wherein the sealed cavity has a volume of between 50 mL-10L.
4. The cigarette tobacco segment oxygen content detection device of claim 1, wherein each of the first seal component and the second seal component is a seal ring.
5. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 4, wherein the sealing ring has a thickness of between 0.5mm and 10 mm.
6. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 4, wherein the sealing ring has a width of between 1mm and 10 mm.
7. The apparatus of claim 1, wherein the first and second sealing members are made of epoxy, polyvinyl chloride, ethylene propylene diene monomer, silicone rubber, thermoplastic elastomer (TPE), neoprene, or urethane rubber.
8. The apparatus of claim 1, wherein the two oxygen concentration measurement devices comprise a microprobe oxygen sensor.
9. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 8, wherein the miniature probe-type oxygen sensor is a solid state sensor.
10. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 9, wherein the solid state sensor has a gas sensor.
11. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette according to claim 10, wherein the gas sensor is made of a semiconductor material, a semiconductor composite material, zinc oxide, iridium oxide, and a composite material of an optical fiber oxide.
12. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 10, wherein the gas sensor has a size of between 0.1nm and 1mm.
13. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 8, wherein the miniature probe type oxygen sensor is a fiber optic oxygen sensor.
14. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 13, wherein the optical fiber oxygen sensor comprises a sensitive membrane formed from a matrix material and a fluorescent dye indicator.
15. The apparatus of claim 14, wherein the matrix material comprises one or more of polymethyl methacrylate, polytetrafluoroethylene, cellulose acetate, polyvinyl chloride, polystyrene, or room temperature vulcanized silicone rubber.
16. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 14, wherein the fluorescent dye indicator comprises one or more of bis-butylpyrene or Ru (II) bidentate complexes.
17. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette according to claim 1, wherein the two oxygen concentration measuring devices comprise chromatographic or spectral type measuring devices.
18. The apparatus for detecting the oxygen content of a tobacco segment of a cigarette of claim 1, wherein the processing system further comprises:
a detection circuit connected to each of the two oxygen concentration measurement devices, respectively, to receive the detected oxygen concentration; and
And the data acquisition system is connected to the detection circuit to acquire and process the data of the oxygen concentration.
19. A method of detecting the oxygen content of a tobacco segment of a cigarette using the cigarette tobacco segment oxygen content detection device of claim 1, comprising the steps of:
Inserting a cigarette to be tested into the heating cavity and the sealing cavity via the first sealing component and the second sealing component, so that the tobacco section is sealed in the heating cavity and part of the hollow section and the filter tip section is sealed in the sealing cavity, and at the moment, the air inlet of the sealing cavity is communicated with the atmosphere;
inserting an end of the filter segment into the smoking machine and checking a sealing state of the cigarette tobacco segment oxygen content detection device;
Selecting a puff mode of the smoking machine;
Detecting the oxygen concentration in the sealed cavity and the air chamber before the smoking machine draws through the two oxygen concentration measuring devices, and sending the oxygen concentration to the processing system;
closing the air inlet through a sealing cover and starting the smoking machine to draw;
After the smoking is finished, waiting for a seal cavity detection signal and an air chamber detection signal received by the processing system to be stable, and processing the seal cavity detection signal and the air chamber detection signal to respectively obtain the concentration of oxygen in the seal cavity and the air chamber after the smoking machine is smoked; and
The oxygen content of the tobacco section of the cigarette is calculated by the processing system according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
Wherein X is the oxygen content (mL) of the tobacco segment during the suction process; c 1 is the oxygen concentration (%) in the sealed cavity after smoking by the smoking machine; c 2 is the oxygen concentration (%) in the air chamber after smoking by the smoking machine; c 01 is the oxygen concentration (%) in the air chamber before smoking by the smoking machine; c 02 is the oxygen concentration (%) in the sealed cavity before smoking by the smoking machine; v 2 is the volume of the sealed cavity; v 1 is the volume of the air chamber.
20. The method of claim 19, wherein the step of processing the sealed cavity detection signal and the air chamber detection signal comprises scaling the sealed cavity detection signal and the air chamber detection signal to oxygen concentrations within the sealed cavity and the air chamber, respectively, after smoking by the smoking machine according to a calibration curve.
21. The method of claim 19, wherein waiting for the seal cavity detection signal and the plenum detection signal received by the processing system to stabilize after the pumping is completed comprises pumping multiple ports according to the volumes of the seal cavity and the plenum and then opening the seal cover until the readings of the two oxygen concentration measurement devices stabilize and then closing the seal cover for detection.
22. The method of claim 19, wherein cigarettes are equilibrated for 48 hours at a temperature of 22 ± 2 ℃ and a relative humidity of 60 ± 5% before being tested, and cigarettes with average mass differences in the range of 5mg are selected for testing.
23. The method of claim 19, wherein the pumping mode comprises an ISO pumping mode or an HCI pumping mode.
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