Trapping system for nicotine in different forms in cigarette mainstream smoke
By designing a collection system for different forms of nicotine in mainstream cigarette smoke, and utilizing condensation treatment and contact with absorbent liquid, the problem of large discrepancies in detection results in existing technologies has been solved, achieving accurate collection of free and protonated nicotine and improving detection precision.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-24
AI Technical Summary
Existing methods for detecting free nicotine and nicotine salts in cigarette smoke have significant discrepancies in the test results, making it difficult to accurately determine the content of different forms of nicotine in the smoke.
A system for capturing different forms of nicotine in mainstream cigarette smoke was designed, including a clamp, a condensation and capture unit, and a Cambridge filter. The smoke is directly introduced into the absorption bottle through a condensation air pipe to contact the absorbent liquid. The condensation process is used to quickly liquefy and condense the smoke, increasing the contact time with the absorbent liquid, and capturing both free and protonated nicotine.
It improves the accuracy of test results, ensures that free nicotine does not convert to protonated state, enhances the solubility of different forms of nicotine in oil and aqueous phases, and improves the accuracy of test results.
Smart Images
Figure CN224035018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nicotine detection technology, and in particular to a system for collecting different forms of nicotine in mainstream cigarette smoke. Background Technology
[0002] Nicotine is a unique component of tobacco, often existing in the form of free nicotine and nicotine salts in tobacco and cigarette smoke. The physiological intensity of smoking is closely related to the free nicotine content; the higher the content, the stronger the effect, significantly impacting the sensory quality of cigarettes. The nicotine content and its forms in cigarette smoke are important indicators for assessing cigarette quality and safety. Therefore, accurately determining the different forms of nicotine in cigarette smoke is crucial for cigarette quality control. Currently, there are many methods for determining the content of free nicotine and nicotine in cigarette smoke. These methods primarily involve placing a trap between the cigarette holder and the smoking machine, using the smoking machine to simulate the smoking process. A Cambridge filter in the trap captures particulate matter from the smoke sample, followed by solid-phase extraction to purify the sample. Finally, the content of free nicotine and nicotine salts is detected by GC-MS and ion chromatography, respectively. However, existing methods yield significantly different results. Therefore, accurately determining the content of free nicotine and nicotine salts in cigarette smoke is increasingly attracting the attention of those skilled in the art. Utility Model Content
[0003] To solve or partially solve the problems existing in related technologies, this utility model provides a system for capturing different forms of nicotine in mainstream cigarette smoke.
[0004] This utility model provides a system for capturing different forms of nicotine in mainstream cigarette smoke, comprising: a clamp, a condensation and collection unit, a Cambridge filter, and a smoking machine; wherein...
[0005] The clamp is used to hold the cigarette to be tested;
[0006] The condensation collection unit includes: an absorption bottle and a condensation gas delivery pipe;
[0007] The condensation air guide tube includes: an inlet pipe, an outlet pipe, and a condensation sleeve; the upper end of the inlet pipe forms an inlet end, which is connected to the cigarette to be tested through a first connecting conduit; the lower end of the inlet pipe forms an outlet end, which is located at the bottom of the absorption bottle; the lower end of the outlet pipe forms an inlet end, which is located at the upper part of the absorption bottle; the upper end of the outlet pipe forms an outlet end; both the inlet pipe and the outlet pipe have pre-cooling sections; the condensation sleeve is sleeved around the pre-cooling sections of the inlet pipe and the outlet pipe, forming a condensation cavity between them; the condensation sleeve is installed on the top of the absorption bottle, and its bottom is sealed to the top of the absorption bottle;
[0008] The suction unit of the smoking machine is connected to the outlet pipe of the condenser air pipe via a second connecting conduit.
[0009] The Cambridge filter disc is arranged on the second connecting conduit and used for filtering the flue gas.
[0010] Further, the pre-cooling section of the air inlet pipe is a spiral pipe section.
[0011] Further, the exhaust end of the air inlet pipe is a horn body with a gradually widened cross section from top to bottom, and a plurality of exhaust holes are arranged on the horn body.
[0012] Further, the outer surface of the bottom of the condensing sleeve and the inner surface of the top of the absorption bottle are ground.
[0013] Further, a sealing gasket is arranged between the outer surface of the bottom of the condensing sleeve and the inner surface of the top of the absorption bottle.
[0014] Further, the condensing sleeve is provided with a condensing inlet and a condensing outlet which are in communication with the condensing cavity; and the condensing outlet is provided with a valve.
[0015] Further, a refrigeration module is arranged in the condensing cavity.
[0016] Further, the condensing trapping units are two, which are a first condensing trapping unit and a second condensing trapping unit connected in series; specifically:
[0017] The air inlet pipe of the condensing air guide pipe of the first condensing trapping unit is connected with the to-be-tested cigarette through a first connecting conduit, the air outlet pipe is connected with the air inlet pipe of the condensing air guide pipe of the second condensing trapping unit through a third connecting conduit, and the suction unit of the smoking machine is connected with the air outlet pipe of the condensing air guide pipe of the second condensing trapping unit through a second connecting conduit.
[0018] Further, the volume of the absorption bottle is 100-200 mL.
[0019] Further, the absorption bottle contains an absorption liquid, and the absorption liquid accounts for 30-45% of the volume of the absorption bottle.
[0020] The cigarette mainstream smoke different form nicotine trapping system provided by the utility model can have the following beneficial effects:
[0021] 1. The trapping system directly introduces the flue gas into the absorption bottle to be trapped by the absorption liquid, so that the free state nicotine is trapped by the oil phase in the absorption liquid before being converted into the proton state, and the accuracy of the detection result is improved.
[0022] 2. The trapping system performs condensation treatment on the flue gas, so that the smoke is quickly liquefied and condensed, the contact time with the absorption liquid is increased, the different forms of nicotine are fully dissolved in the oil phase and the water phase, and the accuracy of the detection result is further improved.
[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description
[0024] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.
[0025] Figure 1 This is a schematic diagram of the structure of a system for capturing different forms of nicotine in mainstream cigarette smoke, as shown in an embodiment of this utility model.
[0026] Figure 2 This is a schematic diagram of the structure of the condensation and collection unit in the collection system for different forms of nicotine in the mainstream cigarette smoke, as shown in an embodiment of this utility model.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1- Clamping device
[0029] 2-Condensation Collection Unit
[0030] 2A - First Condensation Collection Unit
[0031] 2B - Second Condensation Collection Unit
[0032] 21-Absorption Bottle
[0033] 22-Condensation duct;
[0034] 221-Intake pipe
[0035] 222-Exhaust pipe
[0036] 223-Condensing Bushing
[0037] 224-Condenser Inlet
[0038] 225-Condensate Outlet
[0039] 3-Cambridge Filters
[0040] 4-Suction Unit
[0041] 5- Cigarettes to be tested
[0042] L1 - First connecting catheter
[0043] L2 - Second connecting catheter
[0044] L3 - Third connecting catheter
[0045] S-Precooling Section Detailed Implementation
[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.
[0047] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the present application 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" used herein means and includes any or all possible combinations of one or more associated listed items.
[0048] It should be understood that although the terms "first", "second", "third" and the like are used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0049] In the prior art, the detection method of nicotine is to capture the particulate matter of smoke by using a Cambridge filter, and then to extract the smoke components captured by the filter with a solvent for instrument analysis. The present inventors have found that the reason for the inaccuracy of the detection result is that the Cambridge filter captures the smoke, particulate matter and moisture together; the smoke is acidic with a pH of about 6; and in the capturing process, several cigarettes are often smoked for a long time, during which the free nicotine in the captured matter continuously contacts the acidic smoke and is easily converted into protonated state and dissolved in water, thereby causing deviation of the detection result. The capturing system provided in the present application directly guides the smoke into the absorption bottle to contact with the absorption liquid, so that the free nicotine is captured by the oil phase in the absorption liquid before it is converted into protonated state, thereby improving the accuracy of the detection result.
[0050] The present inventors have also found that: due to the excessive amount of smoke inhaled in each puff, the smoke is affected by the airflow and escapes, which affects the absorption efficiency. Therefore, it is considered to condense the smoke to make it quickly liquefy and condense, increase the contact time with the absorption liquid, and make the nicotine in different forms fully dissolve in the oil phase and the water phase. Compared with condensing the absorption bottle, the present embodiment condenses the smoke, which has the advantages that:
[0051] The temperature difference between the liquid and the gas makes the flue gas condense, without affecting the solubility of the absorption liquid; in addition, the flue gas is condensed, without being limited by the freezing point of water, a lower temperature can be used for precooling, thereby further improving the condensation efficiency. The condensed flue gas enters the absorption bottle, and the free nicotine is captured and retained in the oil phase, and the protonated nicotine is captured and retained in the water phase. Thus, the system for capturing different forms of nicotine in the mainstream smoke of a cigarette provided in the embodiment is as follows:
[0052] Please refer to Figure 1 , the capturing system comprises a holder 1, a condensation capturing unit 2, a Cambridge filter 3, and a smoking machine; wherein,
[0053] The holder 1 is used to hold the cigarette to be tested 5;
[0054] The condensation capturing unit 2 comprises an absorption bottle 21 and a condensation gas guide pipe 22;
[0055] Please refer to Figure 2 , the condensation gas guide pipe 22 comprises an air inlet pipe 221, an air outlet pipe 222, and a condensation sleeve 223; the upper end of the air inlet pipe 221 forms an air inlet end, which is connected to the cigarette to be tested 5 through a first connecting conduit L1; the lower end of the air inlet pipe 221 forms an air outlet end, which is located at the bottom of the absorption bottle 21; the lower end of the air outlet pipe 222 forms an air inlet end, which is located at the upper part of the absorption bottle 21; the upper end of the air outlet pipe 222 forms an air outlet end; the air inlet pipe 221 and the air outlet pipe 222 are both formed with a precooling section S; the condensation sleeve 223 is sleeved on the periphery of the precooling section S of the air inlet pipe 221 and the air outlet pipe 222, and forms a condensation cavity with the precooling section S; the condensation sleeve 223 is installed on the top of the absorption bottle 21, and the bottom thereof is sealingly connected with the top of the absorption bottle 21;
[0056] The suction unit 4 of the smoking machine is connected to the air outlet pipe 222 of the condensation gas guide pipe 22 through a second connecting conduit L2;
[0057] The Cambridge filter 3 is arranged on the second connecting conduit L2, and is used to filter the flue gas.
[0058] The trapping system: the holder 1 is used to fix the cigarette 5 to be tested, ensuring the stable export of smoke. The condensation trapping unit 2 comprises an absorption bottle 21 and a condensation gas guide pipe 22, which are used for pre-cooling and absorbing different forms of nicotine. The Cambridge filter 3 is used to filter residual particulate matter to avoid damage to the smoking machine. The smoking machine simulates the smoking process through the suction unit 4 to drive the flow of smoke. The cigarette 5 to be tested is ignited, and the smoking machine is started. The smoke flows into the gas inlet pipe 221 through the first connecting pipe L1. In this process, the smoke is pre-cooled and condensed in the pre-cooling section S, and then enters the absorption bottle 21 to contact with the absorption liquid. The free nicotine is captured by the oil phase, and the protonic nicotine is captured by the water phase. Then the smoke is discharged from the absorption bottle 21 through the gas outlet pipe 222, and enters the second connecting pipe L2. The residual particulate matter is filtered by the Cambridge filter 3 and enters the suction unit 4 of the smoking machine.
[0059] The smoke is pre-cooled and condensed in the pre-cooling section S by the condensation gas guide pipe 22. The condensation gas guide pipe 22 is provided with a condensation cavity. When the smoke passes through the condensation cavity, the temperature of the smoke is rapidly reduced through heat exchange, so that the smoke is rapidly liquefied and condensed, and the contact time with the absorption liquid is increased. In order to improve the pre-cooling effect, the pre-cooling section S of the gas inlet pipe 221 is preferably a spiral pipe section. In addition, in order to buffer the impact of the gas flow on the bottom liquid and disperse the free nicotine in the dissolved absorption gas, the exhaust end of the gas inlet pipe 221 is a horn body with a gradually widening cross section from top to bottom. A plurality of exhaust holes are formed in the horn body.
[0060] For the pre-cooling method of the condensation gas guide pipe 22, dry ice or low-temperature salt water bath cold traps can be arranged in the condensation cavity to rapidly cool the smoke when it passes through; or a refrigeration module can be installed in the condensation cavity to pre-cool by setting a target temperature. Specifically, the following methods can be used:
[0061] In one scheme, as shown in Figure 2 The condensation sleeve 223 is provided with a condensation inlet 224 and a condensation outlet 225 which communicate with the condensation cavity; the condensation outlet 225 is provided with a valve. The heat exchange is realized by introducing the condensation medium into the condensation inlet 224, and the condensation medium is discharged from the condensation outlet 225. The condensation medium can be dry ice, ice ethanol or ethanol dry ice mixed bath.
[0062] Further preferably, the condensation trapping unit 2 further comprises a condensation circulation system, and the condensation inlet 224 and the condensation outlet 225 are connected to the liquid outlet and the liquid return port of the condensation circulation system, respectively. Those skilled in the art can understand that this structure is suitable for the case where the condensation medium is in a flowing state (such as liquid state / solid-liquid mixed state), such as the condensation medium being an ethanol dry ice mixed bath.
[0063] In another solution, a refrigeration module is arranged in the condensation cavity. Specifically, a plurality of semiconductor refrigeration plates (e.g., TEC1-12706) can be installed on the inner wall of the condensation cavity, with the cold end close to the pre-cooling section S of the air inlet pipe 221 and the air outlet pipe 222, and the hot end extending to the outside of the sleeve through the heat sink, which can be forced to dissipate heat by a fan.
[0064] The condensation sleeve 223 also serves to seal the absorption bottle 21, preventing smoke overflow and affecting the detection accuracy. Specifically, the condensation sleeve 223 is installed on the top of the absorption bottle 21, and the two are sealingly connected. For the specific structure of the sealing connection, the following methods can be used:
[0065] The outer surface of the bottom of the condensation sleeve 223 and the inner surface of the top of the absorption bottle 21 are both ground. That is, the condensation sleeve 223 and the absorption bottle 21 are sealed by the cooperation of the ground surfaces. Alternatively,
[0066] A sealing gasket is arranged between the outer surface of the bottom of the condensation sleeve 223 and the inner surface of the top of the absorption bottle 21. That is, the condensation sleeve 223 and the absorption bottle 21 are sealed by the additional sealing member.
[0067] The oil phase in the absorption liquid placed in the absorption bottle 21 is preferably dichloromethane with an internal standard. First, dichloromethane has a high extraction rate for free nicotine; second, its density is greater than that of water, so that the oil phase is located below the water phase, thereby the water phase realizes water sealing for the oil phase to prevent dichloromethane from evaporating with the smoke. Finally, dichloromethane is less toxic and safer to use. The internal standard is preferably heptadecane or anisaldehyde. The water phase is preferably water with a buffer solution, and the purpose of adding the buffer solution to the water is to resist the influence of the dissolution of components in the smoke on the acid-base properties and to maintain the pH at 7.00±0.02; to avoid changes in the form of nicotine due to fluctuations in the pH value, thereby affecting the accuracy of the test results. The volume ratio of the oil phase and the water phase is further preferably 1:1.
[0068] During the smoking process, due to the upward migration of smoke, multiple condensation trapping units 2 help to improve the trapping rate of nicotine. Therefore, as a preferred solution, please refer to Figure 1 , the condensation trapping unit 2 is two, which are the first condensation trapping unit 2A and the second condensation trapping unit B connected in series; specifically:
[0069] The air inlet pipe 221 of the condensation gas guide pipe 22 of the first condensation trapping unit 2A is connected to the to-be-tested cigarette 5 through the first connecting pipe L1, and the air outlet pipe 222 is connected to the air inlet pipe 221 of the condensation gas guide pipe 22 of the second condensation trapping unit 2B through the third connecting pipe L3; the smoking unit 4 of the smoking machine is connected to the air outlet pipe 222 of the condensation gas guide pipe 22 of the second condensation trapping unit 2B through the second connecting pipe L2.
[0070] The volume of the extractant is increased, and the nicotine concentration is reduced, which affects the accurate quantification of the chromatographic analysis. In consideration of the sensitivity of the method and the absorption effect of nicotine, the volume of the absorption bottle 21 is preferably 100-200 mL. Further, the absorption liquid in the absorption bottle 21 accounts for 30-45% of the volume of the absorption bottle 21. Most preferably, the volume of the absorption bottle 21 is 150 mL, and the absorption liquid accounts for 40% of the volume of the absorption bottle 21, that is, 60 mL.
[0071] The application provides a collection system for different forms of nicotine in mainstream cigarette smoke
[0072] 1. The collection system directly introduces the smoke into the absorption bottle to be collected by the absorption liquid, so that the free-state nicotine is captured by the oil phase in the absorption liquid before being converted into the proton state, which helps to improve the accuracy of the detection result.
[0073] 2. The collection system performs condensation treatment on the smoke, so that the smoke is quickly liquefied and condensed, the contact time with the absorption liquid is increased, and the different forms of nicotine are fully dissolved in the oil phase and the water phase, which further improves the accuracy of the detection result.
[0074] The technical scheme of the application will be further described below in combination with specific embodiments:
[0075] Embodiment
[0076] Select a certain commercially available cigarette as a sample to be tested, divide it into three groups, and place the cigarette in a temperature and humidity environment of 22±2℃ and 60±5% for 48h, and then detect according to the following three methods respectively:
[0077] Method I:
[0078] According to the smoking conditions of GB / T 19609-2004, the cigarette is smoked by the conventional filter collection method, 4 cigarette particle phases are collected for each filter, after the smoking is completed, one filter is measured by the method of GB-T 23355-2009.
[0079] Method II:
[0080] According to the smoking conditions of GB / T 19609-2004, the cigarette is smoked by the conventional filter collection method, 4 cigarette particle phases are collected for each filter, after the smoking is completed, the particle phases on the filter are collected, 100 mL of absorption liquid is used, the absorption liquid is dichloromethane (containing an internal standard heptadecane, the content is 0.4 ug / mL) and water (containing a buffer solution, the pH is 7.00±0.02) in a volume ratio of 1:1, and the extraction is shaken for 30 min. After extraction, GC / MS determination is performed.
[0081] Method III:
[0082] 1. As shown in Figure 1The trapping system shown, the trapping system includes: the holder, the first condensation trapping unit, the second condensation trapping unit, the Cambridge filter and the smoking machine, the connecting relationship between the components is as the content of the above embodiment; The volume of the first absorption bottle and the second absorption bottle is 150 mL; 60 mL of absorption liquid is placed in each absorption bottle, and the absorption liquid is dichloromethane (containing internal standard heptadecane, the content is 0.4 ug / mL) and water (containing buffer solution, pH is 7.00±0.02) with a volume ratio of 1:1; The condensation cavity is connected to the circulating condensing medium (dry ice ethanol mixed bath solution, mass volume ratio is 1:5); According to GB / T 19609-2004 "Cigarette Determination of Total Particulate Matter and Tar with Smoking Machine for Routine Analysis", open the smoking machine for smoking; After smoking a group of cigarettes (4), the smoking machine is closed.
[0083] 2, merge the absorption liquid of the first absorption bottle and the second absorption bottle, and stand for stratification to obtain the total extraction liquid; Take 10 mL of oil phase and 10 mL of water phase, and mark them as the first oil phase and the first water phase; In the remaining absorption liquid, take 1 mL of oil phase, and mark it as the second oil phase;
[0084] After filtering the second oil phase organic film (pore size is 0.22 um), GC / MS analysis is carried out, and the GC / MS analysis conditions are as follows:
[0085] GC conditions:
[0086] Chromatographic column: (5%-phenyl)-methyl polysiloxane capillary column, 30 m x 0.25 mm x 0.25 um; Temperature rising program: the initial temperature is 70 DEG C, maintains for 1 min, rises to 280 DEG C at a rate of 15 DEG C / min, and maintains for 5 min; Injection port temperature: 280 DEG C; Injection mode: split injection: split ratio 10:1; Injection amount: 1 uL; Column flow rate: 1.0 mL / min; Carrier gas: high-purity helium.
[0087] MS conditions:
[0088] Transmission line temperature: 280 DEG C; Ion source temperature: 230 DEG C; Quadrupole temperature: 150 DEG C;
[0089] Ionization mode: EI; Ionization energy: 70 eV; Scanning mode: SIM; Scanning ion: nicotine (84, 133); 17C (57, 71); Solvent delay: 6 min.
[0090] The free nicotine content M1 is calculated;
[0091] Add sodium hydroxide solution to the first water phase to adjust the pH to be greater than 8, and vortex and shake the mixture with the first oil phase, and then stand for stratification. After filtering the oil phase organic film, GC / MS analysis is carried out, and the total nicotine content M is calculated.
[0092] The protonated nicotine content M2 was calculated as follows:
[0093] M2 = M - M1
[0094] The results of the total nicotine, free nicotine and protonated nicotine in the mainstream smoke of the cigarettes measured by the above three methods are shown in Table 1.
[0095] Table 1: Nicotine content (ug / cig) measured by different methods
[0096]
[0097] From Table 1, it can be seen that the standard method measures the total nicotine content in the smoke, and cannot measure the free nicotine content. The method of capturing the filter and then measuring the free nicotine content by the buffer-dichloromethane system is lower than the method of the present example. It is possible that due to the moisture in the filter and the effect of the slightly acidic smoke, part of the free nicotine is converted, resulting in a lower result.
[0098] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application or improvement of the technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.
Claims
1. A system for capturing different forms of nicotine in mainstream cigarette smoke, characterized in that, The utility model relates to a cigarette testing device, comprising: a holder, a condensation trapping unit, a Cambridge filter and a smoking machine; wherein, the holder is used for clamping a cigarette to be tested; the condensation trapping unit comprises an absorption bottle and a condensation air duct; the condensation air duct comprises an air inlet pipe, an air outlet pipe and a condensation sleeve; the upper end of the air inlet pipe forms an air inlet end, which is connected to the cigarette to be tested through a first connecting duct; the lower end of the air inlet pipe forms an air outlet end, which is located at the bottom of the absorption bottle; the lower end of the air outlet pipe forms an air inlet end, which is located at the upper part of the absorption bottle; the upper end of the air outlet pipe forms an air outlet end; the air inlet pipe and the air outlet pipe are both provided with a precooling section; the condensation sleeve is sleeved on the periphery of the precooling sections of the air inlet pipe and the air outlet pipe, and forms a condensation cavity with the precooling sections; the condensation sleeve is installed on the top of the absorption bottle, and the bottom thereof is sealingly connected to the top of the absorption bottle; the smoking unit of the smoking machine is connected to the air outlet pipe of the condensation air duct through a second connecting duct; the Cambridge filter is arranged on the second connecting duct and used for filtering smoke.
2. The trapping system of claim 1, wherein, The precooling section of the air inlet pipe is a spiral pipe section.
3. The trapping system of claim 1, wherein, The air outlet end of the air inlet pipe is a horn body with a gradually widening cross section from top to bottom, and a plurality of air outlet holes are formed in the horn body.
4. The trapping system of claim 1, wherein, The outer surface of the bottom of the condensation sleeve and the inner surface of the top of the absorption bottle are both subjected to frosted treatment.
5. The trap system of claim 1, wherein, A sealing gasket is arranged between the outer surface of the bottom of the condensation sleeve and the inner surface of the top of the absorption bottle.
6. The trapping system of claim 1, wherein The condensation sleeve is provided with a condensation inlet and a condensation outlet which are in communication with the condensation cavity; and the condensation outlet is provided with a valve.
7. The trap system of claim 1, wherein A refrigeration module is arranged in the condensation cavity.
8. The trapping system according to any one of claims 1 to 7, characterized in that The condensation trapping unit comprises two condensation trapping units, i.e. a first condensation trapping unit and a second condensation trapping unit which are connected in series; specifically, the air inlet pipe of the condensation air duct of the first condensation trapping unit is connected to the cigarette to be tested through a first connecting duct, the air outlet pipe is connected to the air inlet pipe of the condensation air duct of the second condensation trapping unit through a third connecting duct, and the smoking unit of the smoking machine is connected to the air outlet pipe of the condensation air duct of the second condensation trapping unit through a second connecting duct.
9. The trap system of claim 8, wherein, The volume of the absorption bottle is 100-200 mL.
10. The trapping system of claim 9, wherein, The absorption bottle contains an absorption liquid, and the absorption liquid accounts for 30-45% of the volume of the absorption bottle.