A device, method and analysis method for trapping heated cigarette smoke

Abstract

The present application relates to a kind of heating cigarette smoke trapping device, trapping method and analysis method.The above-mentioned trapping device includes: air inlet pipe, gas flow meter, first valve, mixing pipeline, liquid inlet pipe, solvent bottle, second valve, vacuum distillation mechanism and third valve;Wherein: the end of air inlet pipe is connected with the mouthpiece sleeve of heating cigarette, and the other end is communicated with one end of mixing pipeline;Gas flow meter and first valve are arranged on air inlet pipe;The end of liquid inlet pipe extends into solvent bottle, and the other end is communicated with one end of mixing pipeline;Second valve is arranged on liquid inlet pipe;The other end of mixing pipeline is connected with the distillation flask of vacuum distillation mechanism, and spiral tube mixing ring and third valve are arranged on mixing pipeline.The trapping device is low in cost, and smoke release, trapping, solution concentration are integrated, more suitable for the trapping and analysis detection of heating cigarette smoke with relatively less non-volatile component and relatively large proportion of gas phase component.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating cigarette, in particular to a capturing device, a capturing method and an analysis method for smoke of heating cigarette. BACKGROUND

[0002] In recent years, with the improvement of consumers' health awareness, new tobacco products such as heating cigarettes have become the focus and key of the development of the world tobacco industry. Heating cigarettes do not directly burn cigarettes, but release smoke by heating the reconstituted tobacco material with a lower temperature heating source. Compared with traditional cigarettes, harmful ingredients and potential harmful ingredients are greatly reduced, which can meet the needs of consumers while reducing harm to the body.

[0003] In the process of cigarette research and development, production and quality control, smoke analysis is often needed. Traditional cigarettes produce mainstream smoke under high temperature pyrolysis, and smoke capture mainly uses a smoking machine and a Cambridge filter to capture particulate matter in the mainstream smoke of cigarettes, and a solvent to absorb gaseous matter in the mainstream smoke. The same method is also used for the smoke analysis of heating cigarettes, but the principle of smoke release of heating cigarettes is very different from that of traditional cigarettes. The mainstream smoke of heating cigarettes is formed by aerosol, the content of tar in the mainstream smoke is extremely low, and the aerosol is mainly composed of atomizing agent, water, nicotine, flavor ingredients and a small amount of potential harmful substances. The content of non-volatile ingredients is much lower than that of traditional cigarettes. Therefore, the existing smoke capture method is not suitable for heating cigarettes, often resulting in incomplete capture of smoke components. Moreover, the equipment used in the existing smoke analysis method is also relatively high in cost, which also limits the research on the formation mechanism of the aerosol of heating cigarettes. Therefore, it is necessary to provide a capturing method suitable for the mainstream smoke of heating cigarettes, which is relatively low in cost, so as to comprehensively determine the component information of the mainstream smoke of heating cigarettes. SUMMARY

[0004] To solve or partially solve the problems in the related art, the present application provides a capturing device, a capturing method and an analysis method for smoke of heating cigarette.

[0005] Firstly, the present application provides a capturing device for smoke of heating cigarette, which comprises: a gas inlet pipe, a gas flow meter, a first valve, a mixing pipe, a liquid inlet pipe, a solvent bottle, a second valve, a vacuum distillation mechanism and a third valve; wherein:

[0006] One end of the gas inlet pipe is connected with a filter tip sleeve of the heating cigarette, and the other end is connected in communication with one end of the mixing pipe; the gas flow meter and the first valve are arranged on the gas inlet pipe;

[0007] One end of the liquid inlet pipe extends into the solvent bottle, and the other end is connected in communication with one end of the mixing pipe; the second valve is arranged on the liquid inlet pipe;

[0008] The other end of the mixing pipeline is connected with a distillation flask of a distillation mechanism, and a spiral tube mixing ring and the third valve are arranged on the mixing pipeline.

[0009] Further, the distillation mechanism comprises a heater, a distillation flask, a distillation head, a straight condenser tube, a vacuum tail pipe and a vacuum pump.

[0010] The heater is used for heating the distillation flask.

[0011] The top end of the distillation flask is connected with an air inlet end of the distillation head, and the other end of the mixing pipeline extends into the distillation flask through the air inlet end of the distillation head.

[0012] The air outlet end of the distillation head is connected with the straight condenser tube.

[0013] The other end of the straight condenser tube is connected with a recovery flask through the vacuum tail pipe.

[0014] The vacuum pump is connected with the vacuum tail pipe.

[0015] Further, the distillation flask is a graduated concentration flask.

[0016] Further, the heating cigarette fixing mechanism comprises a mounting frame and a heating cigarette holder fixed to the mounting frame, and the heating cigarette holder is used for fixing a heating cigarette and a cigarette holder.

[0017] Further, the other end of the air inlet pipe and the other end of the liquid inlet pipe are connected with one end of the mixing pipeline through a tee joint.

[0018] Further, the absorption solvent in the solvent bottle is one or more of methanol, ethanol, ethyl acetate, acetone and dichloromethane.

[0019] Further, the solvent bottle is a graduated flask, and / or a liquid flow meter is arranged on the liquid inlet pipe.

[0020] In another aspect, the application also provides a method for capturing heating cigarette smoke, which uses the capturing device of any one of the above-mentioned aspects and performs the following operations.

[0021] Step a), opening the first valve, the second valve and the third valve, starting the vacuum pump of the reduced pressure distillation mechanism, adjusting the vacuum degree, reducing the pressure to be stable, controlling the flow rate of the gas in the air inlet pipe to be a first preset value, controlling the flow rate of the liquid in the liquid inlet pipe to be a second preset value, and recording the corresponding vacuum pressure;

[0022] Step b), closing the first valve and the second valve, inserting the heating cigarette into the cigarette holder, sleeving the cigarette holder sleeve on the filter tip of the cigarette, and connecting the cigarette holder sleeve of the heating cigarette with the air inlet pipe.

[0023] Step c) Press the heating button of the smoking device. After preheating, open the first valve and the second valve in sequence. The smoke from the heated cigarette and the absorbent solvent in the solvent bottle enter the mixing pipeline through the air inlet pipe and the liquid inlet pipe, respectively, and are fully dissolved and mixed in the spiral mixing coil. Then, they enter the distillation flask of the vacuum distillation mechanism.

[0024] Step d) After the heating of the cigarette stops, the smoke collection ends and the third valve is closed;

[0025] Step e) Turn on the heater of the vacuum distillation mechanism, set the heating temperature of the heater to the first preset temperature, concentrate the liquid in the distillation flask under reduced pressure, and recover the absorbed solvent distilled out at the same time; after the vacuum distillation is completed, turn off the vacuum pump and the heater, and collect the liquid in the distillation flask, which is the concentrate rich in heated cigarette smoke components.

[0026] Furthermore, the first preset value is 30 mL / min to 150 mL / min, the second preset value is 5 mL / min to 50 mL / min, and the first preset temperature is 40℃ to 80℃.

[0027] Furthermore, the present invention also provides a method for analyzing heated cigarette smoke, comprising:

[0028] The smoke was captured using the method described above to obtain a concentrate rich in heated cigarette smoke components;

[0029] The concentrate was analyzed by GC-MS; the GC-MS analysis conditions were as follows:

[0030] Chromatographic conditions: DB-5MS capillary column: 60m × 0.25mm × 0.25μm; injection port temperature: 250℃; carrier gas: high-purity helium; flow rate: 1.0mL / min; injection volume: 1μL; splitless injection; column oven temperature program: initial temperature 50℃, hold for 2min; then increase to 280℃ at 8℃ / min, hold for 25min;

[0031] Mass spectrometry conditions: electron impact EI source; ion source temperature 230℃, quadrupole temperature 150℃; transfer line temperature 280℃; ionization energy 70eV; scan range 30~550aum; solvent delay 4.8min.

[0032] The heated cigarette smoke collection device and method provided by the present invention can have the following beneficial effects:

[0033] 1. The collection device provided by the present invention is equipped with a vacuum distillation mechanism, whose vacuum pump provides a negative pressure environment for the entire pipeline. Under negative pressure, solvent absorption is used to collect heated cigarette smoke, which has obvious advantages for the collection of highly volatile components. Compared with the traditional method of collecting particulate matter in mainstream cigarette smoke through Cambridge filters and solvent absorption of gaseous matter in mainstream cigarette smoke, the smoke collection device of the present invention has lower cost and is more suitable for the collection and analysis of heated cigarette smoke with relatively few non-volatile components and a large proportion of gaseous components.

[0034] 2. The collection device provided by this invention integrates flue gas release, collection, and solution concentration, which not only simplifies the operation steps and reduces experimental errors, but also results in a high concentration of flue gas components in the absorbent after vacuum concentration, effectively improving the sensitivity of the method. The solvent recovered from concentration can also be reused, making it green and pollution-free.

[0035] 3. In the collection method provided by the present invention, the suction process is carried out under negative pressure, which can prevent the leakage of flue gas. In addition, the mixing pipeline contains a spiral mixing coil, which can fully mix the flue gas and the solvent, ensuring the effective collection of flue gas components.

[0036] 4. Referring to the relevant parameters of the smoking capacity in the traditional cigarette smoking standards, the volume of the captured heated cigarette smoke can be controlled by controlling the gas flow rate, ensuring that the experimental data has reference value.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0038] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same parts.

[0039] Figure 1 This is a schematic diagram of the structure of a heated cigarette smoke collection device shown in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures

[0041] 1-Intake duct

[0042] 2-Gas Flow Meter

[0043] 3-First Valve

[0044] 4-Mixed Piping

[0045] 41-Helical mixing coil

[0046] 5-Inlet tube

[0047] 6-solvent bottle

[0048] 7-Second valve

[0049] 8-Reduced pressure distillation mechanism

[0050] 81-Heater

[0051] 82-Distillation flask

[0052] 83-Distillation Head

[0053] 84-Straight Condenser Tube

[0054] 85-Vacuum Tail Connector

[0055] 86-Vacuum Pump

[0056] 87-Recycled Bottles

[0057] 9-Third valve

[0058] 10- Heated cigarette fixing mechanism

[0059] 11-Three-way

[0060] 12-Liquid Flow Meter Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0062] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0063] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] This invention provides a collection device for heated cigarette smoke, which is more suitable for collecting heated cigarette smoke with relatively few non-volatile components and a large proportion of gas phase components, and the equipment cost is low.

[0065] Please see Figure 1 The heated cigarette smoke collection device provided in this embodiment of the invention includes: an inlet conduit 1, a gas flow meter 2, a first valve 3, a mixing pipeline 4, a liquid inlet conduit 5, a solvent bottle 6, a second valve 7, a vacuum distillation mechanism 8, and a third valve 9; wherein:

[0066] One end of the air inlet duct 1 is connected to the mouthpiece sleeve of the heated cigarette, and the other end is connected to one end of the mixing pipeline 4; the air inlet duct 1 is equipped with the gas flow meter 2 and the first valve 3.

[0067] One end of the liquid inlet conduit 5 extends into the solvent bottle 6, and the other end is connected to one end of the mixing pipeline 4; a second valve 7 is provided on the liquid inlet conduit 5;

[0068] The other end of the mixing pipeline 4 is connected to the distillation flask 82 of the vacuum distillation mechanism 8. The mixing pipeline 4 is equipped with a spiral mixing coil 41 and the third valve 9.

[0069] The cigarette smoke collection device provided in this embodiment of the invention is equipped with a vacuum distillation mechanism 8. This mechanism 8 serves two purposes: firstly, it concentrates the absorbent solvent containing the smoke components under reduced pressure, thereby increasing the concentration of the smoke components in the detection liquid and thus improving the sensitivity and accuracy of the detection; secondly, vacuum distillation lowers the boiling point of the solvent, allowing it to evaporate at a lower temperature, preventing volatile smoke components from vaporizing with the absorbent solvent at high temperatures. Furthermore, the vacuum distillation mechanism 8 is equipped with a vacuum pump 86, which provides negative pressure to the entire collection device. Under this negative pressure, the smoke generated by heating the cigarette automatically enters the mixing pipeline 4 through the air inlet pipe 1, and the absorbent solvent in the solvent bottle 6 automatically enters the mixing pipeline 4 through the liquid inlet pipe 5. In other words, the smoke and absorbent solvent automatically flow into the mixing pipeline 4 under negative pressure, making full contact within the mixing pipeline 4, where the smoke components are absorbed by the absorbent solvent. That is, the vacuum pump 86 in the aforementioned vacuum distillation mechanism 8 also functions as a suction machine, which is not only low in cost, but also prevents the leakage of smoke by conducting the suction process under negative pressure.

[0070] For details, please see Figure 1 The distillation mechanism includes: heater 81, distillation flask 82, distillation head 83, straight condenser 84, vacuum tail pipe 85 and vacuum pump 86;

[0071] The heater 81 is used to heat the distillation flask 82; Figure 1 The heater 81 shown is a water bath, which has the advantage of constant temperature heating;

[0072] The top of the distillation flask 82 is connected to the air inlet of the distillation head 83; the other end of the mixing pipe 4 passes through the air inlet of the distillation head 83 and extends into the distillation flask 82; the exhaust end of the distillation head 83 is connected to the straight condenser pipe 84.

[0073] The other end of the straight condenser tube 84 is connected to the recovery bottle 87 via a vacuum tail pipe 85.

[0074] The vacuum pump 86 is connected to the vacuum tail pipe 85.

[0075] Preferred, such as Figure 1 As shown, the distillation flask 82 is a graduated concentration flask, which allows the operator to know the volume of the material inside the distillation flask 82 in a timely manner, so as to control the degree of vacuum distillation in a timely manner; furthermore, the volume of the graduated concentration flask is 25mL to 250mL, the volume of the tail tube is 5mL to 15mL, and the graduated concentration flask is made of heat-resistant high borosilicate glass.

[0076] In addition, the distillation head 83 described above can be as follows: Figure 1The diagram shows a Kirschner distillation head. The other end of the mixing line 4 passes through the connecting end and the inlet end of the Kirschner distillation head and extends into the graduated concentration bottle. The connecting end of the Kirschner distillation head is sealed to the mixing line 4, and the inlet end is sealed to the top of the graduated concentration bottle. A thermometer is installed at the temperature measuring end of the Kirschner distillation head, and the exhaust end is sealed to the straight condenser tube 84.

[0077] The aforementioned vacuum pump 86 is connected to the vacuum tail connector 85, thereby connecting the vacuum pump 86 to the entire pipeline. The working passage is regulated by opening and closing the first valve 3, the second valve 7, and the third valve 9. As a preferred embodiment, to prevent flue gas and / or absorption solvent from entering the vacuum pump 86, a protective bottle is also provided between the vacuum tail connector 85 and the vacuum pump 86. This protective bottle can be a safety bottle, a cold trap, and an absorption drying tower connected in sequence. The absorption drying tower can be an anhydrous calcium chloride absorption tower, a sodium hydroxide absorption tower, and a solid paraffin absorption tower connected in sequence.

[0078] In the heated cigarette smoke collection device provided in this embodiment of the invention, the air inlet pipe 1 is used to introduce the smoke into the mixing pipe 4. The air intake volume of the heated cigarette smoke can be adjusted by adjusting the pressure of the vacuum pump 86. A gas flow meter 2 is provided on the air inlet pipe 1 to record the volume of the collected smoke.

[0079] One end of the air inlet duct 1 is connected to the mouthpiece sleeve of the heated cigarette. For ease of connection, the aforementioned collection device preferably also includes a heated cigarette fixing mechanism, which includes: a mounting frame and a heated cigarette holder 10, wherein the heated cigarette holder 10 is fixed to the mounting frame; the heated cigarette holder 10 is used to fix the heated cigarette and its smoking device. Before the collection operation, the heated cigarette is inserted into the smoking device and fixed on the heated cigarette holder 10, the mouthpiece sleeve is fitted onto the filter, and the mouthpiece sleeve is connected to the air inlet duct 1. To prevent smoke leakage, the mouthpiece sleeve is preferably matched to the size of the filter. Furthermore, a rubber ring is provided on the mouthpiece sleeve to enhance the sealing performance.

[0080] The aforementioned inlet conduit 5 is used to introduce the absorbent solvent in the solvent bottle 6 into the mixing conduit 4. A second valve 7 is installed on the conduit to control the amount of absorbent solvent used. The absorbent solvent in the solvent bottle 6 can be one or more of methanol, ethanol, ethyl acetate, acetone, and dichloromethane. The aforementioned absorbent solvent has good solubility for the smoke components of heated cigarettes, low toxicity, and is easily desolvated, facilitating subsequent vacuum distillation.

[0081] The control of the inflow rate of the absorbent solvent can be achieved through one or more of the following methods:

[0082] Method 1: The second valve 7 is a solenoid valve, and the liquid inlet volume is adjusted by adjusting its opening degree;

[0083] Method two involves adjusting the liquid inlet flow rate by adjusting the inner diameter of the liquid inlet conduit 5. This adjustment is typically made after the vacuum level has been pre-adjusted based on the gas flow meter 2. The specific implementation method is as follows:

[0084] The solvent bottle 6 is a graduated bottle. By recording the change in liquid volume of the graduated bottle per unit time, the liquid flow rate under this vacuum degree is obtained. The flow rate is adjusted to a preset range by adjusting the inner diameter of the liquid inlet conduit 5.

[0085] And / or, such as Figure 1 As shown, a liquid flow meter 12 is installed on the liquid inlet conduit 5. The liquid flow rate under this vacuum degree is obtained by recording the value of the liquid flow meter 12. The flow rate is adjusted to a preset range by adjusting the inner diameter of the liquid inlet conduit 5.

[0086] Flue gas and absorbent are mixed in mixing pipe 4 through inlet pipe 1 and liquid inlet pipe 5, respectively, ensuring sufficient contact between the two to improve the solubility of flue gas components in the absorbent. Preferably, please refer to... Figure 1 As shown, the collection device provided in this embodiment preferably includes a three-way connector 11, through which the other end of the air inlet conduit 1 and the other end of the liquid inlet conduit 5 are connected to one end of the mixing pipeline 4. This facilitates the assembly and disassembly of the air inlet conduit 1 and the liquid inlet conduit 5. In particular, it facilitates the replacement of liquid inlet conduits 5 of different sizes when the flow rate is adjusted by adjusting the inner diameter of the liquid inlet conduit 5.

[0087] The aforementioned mixing pipeline 4 is equipped with a spiral mixing coil 41 and a third valve 9. The spiral mixing coil 41 is a glass mixing tube, commonly used in continuous flow analyzers to ensure the mixing of two fluid streams. In this embodiment, it is specifically used to ensure the mixing of flue gas and absorbent solvent. Under negative pressure, the flue gas and absorbent solvent flow through the spiral mixing coil 41, moving up and down during their passage, accelerating the mixing process and achieving thorough mixing of the flue gas components by the absorbent solvent, thus ensuring effective capture of the flue gas components. Those skilled in the art can adjust the thickness, length, and number of turns of the spiral mixing coil 41 according to factors such as the amount of flue gas and absorbent solvent used to ensure thorough mixing of the flue gas and absorbent solvent.

[0088] Based on the above-described heated cigarette smoke collection device, another embodiment of the present invention also provides a method for collecting heated cigarette smoke, comprising:

[0089] Step a) Open the first valve 3, the second valve 7, and the third valve 9, turn on the vacuum pump 86 of the vacuum distillation mechanism 8, adjust the vacuum level, reduce the pressure until it is stable, control the flow rate of gas in the gas inlet pipe 1 to the first preset value, the flow rate of liquid in the liquid inlet pipe 5 to the second preset value, and record the corresponding vacuum pressure.

[0090] Step b) Close the first valve 3 and the second valve 7, insert the heated cigarette into the smoking device, put the cigarette mouthpiece sleeve on the cigarette filter, and connect the heated cigarette mouthpiece sleeve to the air inlet duct 1; specifically, the heated cigarette and the smoking device can be fixed on the heated cigarette and smoking device holder 10.

[0091] Step c) Press the heating button of the smoking device. After preheating, open the first valve 3 and the second valve 7 in sequence. The smoke from the heated cigarette and the absorbent in the solvent bottle 6 enter the mixing pipe 4 through the air inlet pipe 1 and the liquid inlet pipe 5, respectively, and are fully dissolved and mixed in the spiral mixing coil 41. Then, they enter the distillation flask 82 of the vacuum distillation mechanism 8.

[0092] Step d) After the heating of the cigarette stops, the smoke collection ends and the third valve 9 is closed;

[0093] Step e) Turn on the heater 81 of the vacuum distillation mechanism 8, set the heating temperature of the heater 81 to the first preset temperature, concentrate the liquid in the distillation flask 82 under reduced pressure, and recover the absorbed solvent distilled out at the same time; after the vacuum distillation is completed, turn off the vacuum pump 86 and the heater 81, and collect the liquid in the distillation flask 82, which is a concentrated liquid rich in heated cigarette smoke components.

[0094] Step a) above is a preparatory step before flue gas capture. It is used to adjust the inlet air flow rate and the inlet liquid flow rate to ensure a suitable mixing ratio, and to record the vacuum pressure at this time. This preparatory step can be omitted for subsequent repetitive operations, where the vacuum pump 86 can be directly adjusted to this vacuum pressure. In this step, the first preset value is preferably 30 mL / min to 150 mL / min, and the second preset value is preferably 5 mL / min to 50 mL / min.

[0095] Then, following step b), connect the cigarette holder sleeve to the air inlet duct 1. Since no smoke is generated at this time, the first valve 3 and the second valve 7 must be closed first. After the above operations are completed, follow step c) to press the heating button of the smoking device. After preheating, open the first valve 3 and the second valve 7 in sequence. The smoke from the heated cigarette and the absorbent solvent in the solvent bottle 6 enter the mixing pipe 4 through the air inlet duct 1 and the liquid inlet duct 5 under negative pressure, respectively, and are fully dissolved and mixed in the spiral mixing coil 41. Then, they enter the distillation flask 82 of the vacuum distillation mechanism 8. Thus, the smoke components are fully captured by the absorbent solvent and collected by the distillation flask 82.

[0096] To increase the concentration of flue gas components in the absorbent and improve detection accuracy, a vacuum concentration step (e) is required. The absorbent solvent is distilled into a gas under reduced pressure and then condensed. The condensate is collected in recovery bottle 87 and can be reused. The liquid collected in distillation flask 82 after vacuum concentration is a concentrated solution rich in heated cigarette smoke components, which can be directly used for flue gas component analysis. In this step, the absorbent solvent is preferably one or more of methanol, ethanol, ethyl acetate, acetone, dichloromethane, or cyclohexane, and the first preset temperature is preferably 40℃~80℃.

[0097] As can be seen from the above, the heated cigarette smoke collection device and method provided in the embodiments of the present invention have the following advantages:

[0098] 1. The collection device provided by the present invention is equipped with a vacuum distillation mechanism 8, whose vacuum pump 86 provides a negative pressure environment for the entire pipeline. Under negative pressure, solvent absorption is used to collect heated cigarette smoke, which has obvious advantages for the collection of high volatile components. Compared with the traditional method of collecting particulate matter in mainstream cigarette smoke through Cambridge filters and solvent absorption of gaseous matter in mainstream cigarette smoke, the smoke collection device of the present invention has lower cost and is more suitable for the collection and analysis of heated cigarette smoke with relatively few non-volatile components and a large proportion of gaseous components.

[0099] 2. The collection device provided by this invention integrates flue gas release, collection, and solution concentration, which not only simplifies the operation steps and reduces experimental errors, but also results in a high concentration of flue gas components in the absorbent after vacuum concentration, effectively improving the sensitivity of the method. The solvent recovered from concentration can also be reused, making it green and pollution-free.

[0100] 3. In the collection method provided by the present invention, the suction process is carried out under negative pressure, which can prevent the leakage of flue gas. In addition, the mixing pipeline 4 contains a spiral mixing coil 41, which can fully mix the flue gas and the solvent, ensuring the effective collection of flue gas components.

[0101] 4. Referring to the relevant parameters of the smoking capacity in the traditional cigarette smoking standards, the volume of the captured heated cigarette smoke can be controlled by controlling the gas flow rate, ensuring that the experimental data has reference value.

[0102] Another embodiment of the present invention provides a method for analyzing heated cigarette smoke, comprising:

[0103] The smoke was captured using the method described above to obtain a concentrate rich in heated cigarette smoke components;

[0104] The concentrate was analyzed by GC-MS; the GC-MS analysis conditions were as follows:

[0105] Chromatographic conditions: DB-5MS capillary column: 60m × 0.25mm × 0.25μm; injection port temperature: 250℃; carrier gas: high-purity helium; flow rate: 1.0mL / min; injection volume: 1μL; splitless injection; column oven temperature program: initial temperature 50℃, hold for 2min; then increase to 280℃ at 8℃ / min, hold for 25min;

[0106] Mass spectrometry conditions: electron impact EI source; ion source temperature 230℃, quadrupole temperature 150℃; transfer line temperature 280℃; ionization energy 70eV; scan range 30~550aum; solvent delay 4.8min.

[0107] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0108] The following embodiments employ the following methods: Figure 1 The heating cigarette smoke collection device shown specifically includes: an inlet pipe 1, a gas flow meter 2, a first valve 3, a tee 11, a mixing pipe 4, a liquid inlet pipe 5, a solvent bottle 6, a second valve 7, a liquid flow meter 12, a vacuum distillation mechanism 8, a third valve 9, and a heating cigarette fixing mechanism; wherein:

[0109] The heated cigarette fixing mechanism includes: a mounting frame and a heated cigarette holder 10, wherein the heated cigarette holder 10 is fixed to the mounting frame; the heated cigarette holder 10 is used to fix the heated cigarette and its holder.

[0110] One end of the air inlet duct 1 is connected to the mouthpiece sleeve of the heated cigarette, and the other end is connected to one end of the mixing pipeline 4 through the tee 11; a gas flow meter 2 and a first valve 3 are installed on the air inlet duct 1;

[0111] One end of the liquid inlet conduit 5 extends into the solvent bottle 6, and the other end is connected to one end of the mixing pipeline 4 via a three-way valve 11; a liquid flow meter 12 and a second valve 7 are installed on the liquid inlet conduit 5; the solvent bottle 6 contains an absorbent solvent; the absorbent solvent in Example 1 is methanol, and the absorbent solvent in Example 2 is ethyl acetate;

[0112] The vacuum distillation unit 8 includes: a water bath (corresponding to...) Figure 1 Medium heater 81), concentration graduated bottle (corresponding to) Figure 1 Medium distillation flask 82), Kreutz distillation head (corresponding to) Figure 1 The distillation head 83), straight condenser 84, vacuum tail pipe 85, and vacuum pump 86 are included; a water bath is used to heat the concentration graduated bottle.

[0113] The other end of the mixing pipeline 4 passes through the connecting end and the inlet end of the Kirschner distillation head and extends into the graduated concentration bottle. The mixing pipeline 4 is equipped with a spiral mixing coil 41 and a third valve 9. The connecting end of the Kirschner distillation head is sealed to the mixing pipeline 4, and the inlet end is sealed to the top of the graduated concentration bottle. A thermometer is installed at the temperature measuring end of the Kirschner distillation head, and the exhaust end is sealed to the straight condenser tube 84. The other end of the straight condenser tube 84 is connected to the recovery bottle 87 through the vacuum tail pipe 85. The vacuum pump 86 is connected to the vacuum tail pipe 85.

[0114] Example 1

[0115] Open valves 3, 7, and 9, and vacuum pump 86. Adjust the vacuum level until it stabilizes. Control the gas flow rate in inlet pipe 1 to 115 mL / min and the liquid flow rate in inlet pipe 5 to 50 mL / min, and record the corresponding vacuum pressure readings. Then close valves 3 and 7. Insert the heated cigarette into the smoking device and fix it to the heated cigarette holder. Put the mouthpiece sleeve on the cigarette filter and connect the mouthpiece sleeve to inlet pipe 1. Press the heating button on the smoking device. After 30 seconds... First valve 3 and second valve 7 are opened sequentially. Heated cigarette smoke and methanol enter the spiral mixing coil 41 through the air inlet pipe 1 and liquid inlet pipe 5, respectively, via the three-way valve 11. They are fully dissolved and mixed within the spiral mixing coil 41, and then enter the graduated concentration bottle. After 200 seconds, the cigarette device stops heating, smoke collection ends, and third valve 9 is closed. Then, the water bath is opened and heated to 50℃. The methanol evaporates, is condensed, and enters the recovery bottle 87. Heating is stopped when the remaining solution in the graduated concentration bottle is 15 mL. The solution in the graduated concentration bottle is used for GC-MS analysis, and the recovered methanol can be reused. The GC-MS analysis conditions are as follows:

[0116] Chromatographic conditions: DB-5MS capillary column (60m × 0.25mm × 0.25μm, Agilent Technologies); injection port temperature 250℃; carrier gas: high-purity helium; flow rate: 1.0mL / min; injection volume: 1μL; splitless injection. Column oven temperature program: initial temperature 50℃, hold for 2 min; then increase to 280℃ at 8℃ / min, hold for 25 min.

[0117] Mass spectrometry conditions: electron impact EI source; ion source temperature 230℃, quadrupole temperature 150℃; transfer line temperature 280℃; ionization energy 70eV; scan range 30~550aum; solvent delay 4.8min.

[0118] The composition of smoke from heated cigarettes is listed in Table 1.

[0119] Example 2

[0120] Open the first valve 3, the second valve 7, the third valve 9, and the vacuum pump 86. Adjust the vacuum level and reduce the pressure until it stabilizes. Control the gas flow rate in the air inlet pipe 1 to 45 mL / min and the liquid flow rate in the liquid inlet pipe 5 to 5 mL / min, and record the corresponding vacuum pressure gauge readings. Then close the first valve 3 and the second valve 7. Insert the heated cigarette into the smoking device and fix it on the heated cigarette holder. Put the mouthpiece sleeve on the cigarette filter and connect the mouthpiece sleeve to the air inlet pipe 1. Press the heating button of the smoking device. After 30 seconds, turn on the heating button sequentially. Open the first valve 3 and the second valve 7. Heated cigarette smoke and ethyl acetate enter the spiral mixing coil 41 through the air inlet pipe 1 and the liquid inlet pipe 5, respectively, via the three-way valve 11. They are fully dissolved and mixed within the spiral mixing coil 41, and then enter the graduated concentration bottle. After 200 seconds, the cigarette device stops heating, smoke collection ends, and the third valve 9 is closed. Then, the water bath is opened and heated to 55°C. The ethyl acetate evaporates and is then condensed before entering the recovery bottle 87. Heating is stopped when the remaining solution in the graduated concentration bottle is 10 mL. The solution in the graduated concentration bottle is used for GC-MS analysis. The recovered ethyl acetate can be reused. The GC-MS analysis conditions are the same as in Example 1. The smoke composition of the heated cigarette is listed in Table 1.

[0121] Table 1. Composition of heated cigarette smoke

[0122]

[0123]

[0124]

[0125]

[0126] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A device for collecting heated cigarette smoke, characterized in that, include: The system includes an inlet duct, a gas flow meter, a first valve, a mixing line, an inlet duct, a solvent bottle, a second valve, a tee, a vacuum distillation mechanism, and a third valve; among which: One end of the air inlet duct is connected to the mouthpiece sleeve of the heated cigarette, and the other end is connected to one end of the mixing pipeline through the tee; the air inlet duct is equipped with the gas flow meter and the first valve; One end of the liquid inlet conduit extends into the solvent bottle, and the other end is connected to one end of the mixing pipeline via the tee; a second valve is provided on the liquid inlet conduit. The other end of the mixing pipeline is connected to the distillation flask of the vacuum distillation mechanism, and the mixing pipeline is equipped with a spiral mixing coil and the third valve; The vacuum distillation mechanism includes: a heater, a distillation flask, a distillation head, a straight condenser, a vacuum tailpipe, and a vacuum pump; The heater is used to heat the distillation flask; The top of the distillation flask is connected to the air inlet of the distillation head; the other end of the mixing pipeline passes through the air inlet of the distillation head and extends into the distillation flask. The exhaust end of the distillation head is connected to a straight condenser tube; The other end of the straight condenser tube is connected to the recovery bottle via a vacuum tail connector; The vacuum pump is connected to the vacuum tailpipe.

2. The device for collecting heated cigarette smoke according to claim 1, characterized in that, The distillation flask is a graduated concentration flask.

3. The device for collecting heated cigarette smoke according to claim 1, characterized in that, It also includes a heated cigarette fixing mechanism, which includes a mounting frame and a heated cigarette holder. The heated cigarette holder is fixed to the mounting frame and is used to fix the heated cigarette and its attachment.

4. The device for collecting heated cigarette smoke according to claim 1, characterized in that, The absorbent solvent in the solvent bottle is one or more of methanol, ethanol, ethyl acetate, acetone, and dichloromethane.

5. The device for collecting heated cigarette smoke according to claim 1, characterized in that, The solvent bottle is a graduated bottle; a liquid flow meter is installed on the liquid inlet conduit.

6. A method for capturing heated cigarette smoke, characterized in that, Using the heated cigarette smoke collection device according to any one of claims 1 to 5, the following operation is performed: Step a) Open the first valve, the second valve and the third valve, turn on the vacuum pump of the vacuum distillation mechanism, adjust the vacuum level, reduce the pressure until it is stable, control the flow rate of gas in the gas inlet pipe to the first preset value, the flow rate of liquid in the liquid inlet pipe to the second preset value, and record the corresponding vacuum pressure. Step b) Close the first valve and the second valve, insert the heated cigarette into the smoking device, put the mouthpiece sleeve on the cigarette filter, and connect the heated cigarette mouthpiece sleeve to the air inlet duct. Step c) Press the heating button of the smoking device. After preheating, open the first valve and the second valve in sequence. The smoke from the heated cigarette and the absorbent solvent in the solvent bottle enter the mixing pipeline through the air inlet pipe and the liquid inlet pipe, respectively, and are fully dissolved and mixed in the spiral mixing coil. Then, they enter the distillation flask of the vacuum distillation mechanism. Step d) After the heating of the cigarette stops, the smoke collection ends and the third valve is closed; Step e) Turn on the heater of the vacuum distillation mechanism, set the heating temperature of the heater to the first preset temperature, concentrate the liquid in the distillation flask under reduced pressure, and recover the distilled absorption solvent at the same time; after the vacuum distillation is completed, turn off the vacuum pump and the heater, and collect the liquid in the distillation flask, which is the concentrate rich in heated cigarette smoke components.

7. The method for collecting heated cigarette smoke according to claim 6, characterized in that, The first preset value is 30 mL / min ~ 150 mL / min, the second preset value is 5 mL / min ~ 50 mL / min, and the first preset temperature is 40 ℃ ~ 80 ℃.

8. A method for analyzing heated cigarette smoke, characterized in that, include: The smoke is captured according to the method for capturing heated cigarette smoke as described in claim 6 or 7, and a concentrated liquid rich in heated cigarette smoke components is obtained. The concentrate was analyzed by GC-MS; the GC-MS analysis conditions were as follows: Chromatographic conditions: DB-5MS capillary column: 60 m × 0.25 mm × 0.25 μm; injection port temperature: 250℃; carrier gas: high-purity helium; Flow rate: 1.0 mL / min; injection volume: 1 μL; splitless injection; column oven temperature program: initial temperature 50℃, hold for 2 min; then increase to 280℃ at 8 ℃ / min, hold for 25 min; Mass spectrometry conditions: electron impact EI source; ion source temperature 230℃, quadrupole temperature 150℃; transfer line temperature 280℃; ionization energy 70 eV; scan range 30–550 aum; solvent delay 4.8 min.

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