Cigarette mainstream smoke component detection system and method
By designing a detection system for mainstream cigarette smoke components, automated extraction and sample delivery were achieved, solving the problems of low automation and human error in traditional methods, and improving detection efficiency and data accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional mainstream cigarette smoke analysis methods have a low degree of automation, which limits detection efficiency, and manual operation is prone to introducing errors, affecting data repeatability and accuracy.
Design a mainstream cigarette smoke component detection system, including an extraction component, a suction component, and a sample delivery component, to realize automatic quantitative delivery of extractant, automatic extraction of smoke, and automatic sample delivery of extractant, eliminating filter retention and manual operation, forming an automatic integrated process of 'extraction-suction-sample delivery'.
It enables high-throughput continuous detection, avoids the risks of volatilization and contamination during sample transfer, ensures consistent detection conditions, significantly improves the repeatability and accuracy of detection data, and shortens the detection cycle.
Smart Images
Figure CN121805474A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tobacco chemical analysis and detection technology, and in particular relates to a system and method for detecting mainstream components of cigarette smoke. Background Technology
[0002] In traditional analysis of mainstream cigarette smoke, a standard smoking machine combined with a Cambridge filter pad is commonly used for particulate matter capture. The basic procedure is as follows: The smoking machine simulates human inhalation, passing the mainstream smoke produced by combustion through the Cambridge filter pad. Particulate matter is trapped by the filter, while gaseous components are expelled. Subsequently, the filter pad is manually removed, and the residue on the pad is extracted using a solvent. Finally, the extract is transferred to analytical equipment (such as high-performance liquid chromatography, HPLC) for component determination.
[0003] However, this traditional method has obvious drawbacks: on the one hand, it requires manual replacement of filter plates, preparation of solvents, and manual extraction, resulting in low automation and difficulty in achieving high-throughput continuous detection; on the other hand, filter plate transfer, solvent addition, and extraction processes may cause the target substance to volatilize, adsorb, or cross-contaminate, which can easily introduce errors. Furthermore, differences in the techniques of different operators can lead to inconsistent extraction efficiency, affecting data repeatability and detection accuracy.
[0004] In summary, there is an urgent need to design a detection system and method for the mainstream components of cigarette smoke to improve the shortcomings of traditional analytical methods. Summary of the Invention
[0005] One objective of this invention is to provide a system for detecting the main components of cigarette smoke, which can improve the repeatability, reliability and accuracy of data, and meet the requirements of high-throughput continuous detection.
[0006] To achieve this objective, the present invention adopts the following technical solution: The mainstream cigarette smoke component detection system includes: An extraction assembly includes a storage tank and an extraction bottle. The storage tank is connected to the extraction bottle and is used to store the extractant and to quantitatively deliver the extractant to the extraction bottle. One end of the extraction bottle is provided with a cigarette connector for detachably connecting a cigarette. The gas outlet of the cigarette connector extends to below the surface of the extractant in the extraction bottle. The bottom end of the extraction bottle is provided with a drain port for discharging the extractant containing the target component. A suction assembly is connected to the extraction bottle and can draw the lit cigarette according to a preset suction program so that the smoke produced by the cigarette can pass through the extraction liquid and achieve the extraction of the target component. A sample delivery assembly is movably disposed between the drain port and the analytical device, and is used to transfer the extract containing the target component to the analytical device.
[0007] Preferably, the extraction assembly further includes a sealing lip and a smoke guide tube. The sealing lip is sealed at the cigarette interface, and the cigarette is detachably inserted into the sealing lip. The top end of the smoke guide tube is connected to the sealing lip, and the bottom end of the smoke guide tube extends to below the surface of the extraction liquid in the extraction bottle.
[0008] Preferably, the bottom end of the flue gas guide pipe is provided with an exhaust component, and the exhaust component has multiple exhaust holes along the circumferential direction, all of which are connected to the inner cavity of the flue gas guide pipe.
[0009] Preferably, an inlet pipe is connected between the outlet of the storage tank and the extraction bottle. The inlet pipe is equipped with an inlet valve and a drive pump. The drive pump is used to inject the extract from the storage tank into the extraction bottle through the inlet pipe when the inlet valve is opened.
[0010] Preferably, the extraction bottle is equipped with a liquid level sensor, which is linked to the drive pump. The liquid level sensor is used to detect the liquid level information in the extraction bottle. When the liquid level of the extractant in the extraction bottle rises to a first preset position, the delivery pump can drive the motor to run in reverse so as to draw the remaining extractant in the inlet pipe back into the storage tank.
[0011] Preferably, the suction assembly includes a suction unit, a suction tube, and a suction valve. The suction port of the suction unit is connected to one end of the suction tube, and the other end of the suction tube is connected to the extraction bottle. The suction unit can suck up the flue gas through the suction tube. The suction valve is linked to the liquid inlet valve, and their opening and closing states are different.
[0012] Preferably, the aspiration unit includes a syringe and a gas collection bag, wherein the aspiration end of the syringe is sealed to one end of the aspiration tube, and the exhaust end of the syringe is sealed to the gas collection bag.
[0013] Preferably, a drain valve is provided at the drain port, and the drain valve is linked to the liquid level sensor. When the liquid level of the extractant in the extraction bottle drops to a second preset position, the drain valve can switch to the closed state.
[0014] Preferably, the sample delivery assembly includes a chromatographic vial and a robotic arm. The chromatographic vial is used to hold the extract containing the target component, and the end effector of the robotic arm is detachably connected to the chromatographic vial. The robotic arm is used to transfer the chromatographic vial to the analytical device.
[0015] Another objective of this invention is to provide a method for detecting mainstream cigarette smoke components, which can improve the repeatability, reliability, and accuracy of data, and meet the requirements of high-throughput continuous detection.
[0016] To achieve this objective, the present invention adopts the following technical solution: The method for detecting the mainstream components of cigarette smoke is implemented using the cigarette mainstream smoke component detection system described above, and includes the following steps: Use a storage tank to deliver the extractant quantitatively to the extraction flask; Insert the cigarette into the cigarette inlet located at one end of the extraction bottle and light the cigarette; Using the suction component, smoke is started according to a preset suction program. The smoke produced by the cigarette can pass through the extract liquid and achieve the extraction of the target components. After the cigarette is smoked, the drain port at the bottom of the extraction bottle is opened to discharge the extract containing the target component into the sample delivery assembly. The sample delivery assembly is used to transfer the extract containing the target component to an analytical device for detection.
[0017] Beneficial effects: The cigarette smoke component detection system provided in this embodiment has two main advantages. First, by extending the exhaust end of the extraction bottle directly below the surface of the extraction liquid, and using a pre-programmed suction procedure with the suction component, the smoke directly passes through the extraction liquid to simultaneously dissolve and extract the target components. This eliminates the intermediate steps of filter retention, manual disassembly, and offline extraction, shortening the single-sample detection cycle and enabling continuous, high-throughput detection. This solves the shortcomings of traditional methods, such as low automation and limited detection efficiency. Second, the system forms an automated integrated process of "extraction-suction-sample delivery": first, the storage tank quantitatively delivers the extraction liquid to the extraction bottle; after the smoke is extracted in the extraction liquid, the sample delivery component directly transfers the extraction liquid containing the target components to the analytical device. The entire process requires no manual intervention, effectively avoiding the risks of volatilization, adsorption, and contamination during sample transfer, eliminating human error, ensuring the consistency of detection conditions for different batches of samples, and significantly improving the repeatability and accuracy of the detection data.
[0018] The method for detecting mainstream cigarette smoke components provided in this embodiment eliminates the need for using, replacing, or disposing of Cambridge filters, fundamentally avoiding problems such as uneven filter adsorption, transfer loss, and solvent residue. This significantly shortens sample pretreatment time and improves efficiency. Furthermore, the smoke can be directly passed into the low-temperature extraction solution, allowing particulate matter to rapidly condense and dissolve in the liquid environment, resulting in a larger contact area and higher mass transfer efficiency, effectively improving the recovery rate and detection sensitivity of the target components. In addition, the entire process, from extraction solution injection, cigarette inhalation, extraction completion to extraction solution transfer, is automatically executed under program control, ensuring highly consistent experimental conditions. This significantly improves data repeatability and reliability, laying the foundation for building a fully automated smoke analysis workstation. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the cigarette mainstream smoke component detection system provided in an embodiment of the present invention.
[0020] In the picture: 100. Cigarettes; 1. Extraction assembly; 11. Storage tank; 12. Extraction flask; 13. Inlet pipe; 14. Drive pump; 15. Sealing lip; 16. Drain valve; 2. Suction assembly; 21. Suction unit; 22. Suction tube; 3. Sample delivery assembly; 31. Chromatography vial; 32. Robotic arm. Detailed Implementation
[0021] To make the technical problems solved by this invention, the technical solutions adopted, and the technical effects achieved clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to this invention, not the entire structure.
[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0024] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.
[0025] refer to Figure 1 As shown, this invention provides a system for detecting mainstream cigarette smoke components, including an extraction component 1, a suction component 2, and a sample delivery component 3. The extraction component 1 includes a storage tank 11 and an extraction bottle 12. The storage tank 11 is connected to the extraction bottle 12 and stores the extractant to be used, and can quantitatively deliver the extractant to the extraction bottle 12. One end of the extraction bottle 12 is provided with a cigarette interface for detachably connecting a cigarette 100. The outlet of the cigarette interface extends below the surface of the extractant in the extraction bottle 12, and a drain port is provided at the bottom of the extraction bottle 12 to discharge the extractant containing the target components from the cigarette 100. The suction component 2 is connected to the extraction bottle 12. The suction component 2 can simulate human lung function and can inhale the lit cigarette 100 according to a preset program, so that the smoke generated by the cigarette 100 can pass through the extractant, allowing the smoke to contact the extractant and thus extracting the target components. The sample delivery component 3 is movably disposed between the drain port and the analysis device, and can transfer the extract containing the target component to the analysis device so that the target component in the extract can be analyzed and detected by the analysis device.
[0026] In the above setup, on the one hand, this system extends the cigarette outlet of the extraction bottle 12 directly below the surface of the extraction liquid, and with the pre-programmed suction of the suction component 2, the smoke directly passes through the extraction liquid to complete the simultaneous dissolution and extraction of the target component (particulate matter). This eliminates the intermediate steps of filter retention, manual disassembly, and offline extraction, shortening the single-sample detection cycle and enabling continuous, high-throughput detection. It solves the shortcomings of traditional methods, such as low automation and limited detection efficiency. On the other hand, this system forms an automated integrated process of "extraction-suction-sample delivery": first, the storage tank 11 quantitatively delivers the extraction liquid to the extraction bottle 12. After the smoke is extracted in the extraction liquid, the sample delivery component 3 can directly transfer the extraction liquid containing the target component to the analytical device. The entire process requires no manual intervention, effectively avoiding the risks of volatilization, adsorption, and contamination during sample transfer, eliminating human error, ensuring the consistency of detection conditions for different batches of samples, and significantly improving the repeatability and accuracy of the detection data.
[0027] Specifically, in this embodiment, an inlet pipe 13 connects the outlet of the storage tank 11 and the extraction bottle 12. The inlet pipe 13 is equipped with an inlet valve and a drive pump 14, both electrically connected to an external control system. When extractant needs to be delivered into the extraction bottle 12, the control system first sends an opening command to the inlet valve. After the inlet valve is fully opened, the drive pump 14 is started. After the drive pump 14 starts, the extractant flows out of the storage tank 11 under the power of the drive pump 14 and is stably injected into the extraction bottle 12 through the inlet pipe 13. Furthermore, it should be noted that before supplying extractant to the extraction bottle 12, the operator can preset the opening degree of the inlet valve and the operating power of the drive pump 14 for the same batch of tests using the control system. Combined with the preset operating time of the drive pump 14, the flow rate of the extractant can be precisely controlled, thereby achieving quantitative delivery of the extractant to ensure the consistency of the extractant volume and the accuracy of the test data when multiple samples are tested.
[0028] Specifically, in this embodiment, a liquid level sensor is provided inside the extraction bottle 12, and the liquid level sensor is linked to the drive pump 14. In actual use, the liquid level sensor is electrically connected to the control system. The liquid level sensor is used to detect the liquid level information inside the extraction bottle 12. During the process of injecting the extractant into the extraction bottle 12 by the drive pump 14, when the liquid level of the extractant in the extraction bottle 12 rises to the first preset position, the liquid level sensor immediately sends a liquid level attainment signal to the control system. After receiving the attainment signal, the control system immediately sends a reverse command to the drive pump 14, causing the drive motor of the drive pump 14 to switch to reverse operation. On the one hand, it stops delivering the extractant into the extraction bottle 12, and on the other hand, it pumps the extractant remaining in the inlet pipe 13 back into the storage tank 11, ensuring that no residual liquid drips into the extraction bottle 12 from the inlet pipe 13, so as to ensure that the final liquid volume of the extractant in the extraction bottle 12 accurately matches the preset value.
[0029] Furthermore, in this embodiment, the inlet valve also has a sealing function. That is, after the drive pump 14 completely draws out the residual extract in the inlet pipe 13, the inlet valve switches to the closed state, cutting off the inlet pipe 13 so that the extraction bottle 12 can be in a closed state at this time, reducing the contamination and interference of external impurities and improving the accuracy of the detection results.
[0030] Optionally, in this embodiment, the extraction assembly 1 further includes a sealing lip 15 and a smoke guide tube to improve the contact efficiency between the smoke and the extractant and prevent smoke leakage. The sealing lip 15 is sealed at the cigarette inlet, and the cigarette 100 is detachably inserted into the sealing lip 15. The top end of the smoke guide tube is connected to the sealing lip 15, and the bottom end extends below the surface of the extractant in the extraction bottle 12. With this configuration, the mainstream smoke generated by the lit cigarette 100 can enter the smoke guide tube through the sealing lip 15. Driven by the negative pressure of the suction assembly 2, it is directly injected into the extractant through the smoke guide tube, creating forced convection contact between the smoke and the extractant. This not only prevents the smoke from escaping directly from the bottle without contacting the extractant but also prolongs the residence time of the smoke in the extractant, improving the dissolution and extraction efficiency of the target particulate matter. Simultaneously, the detachable design of the sealing lip 15 facilitates adaptation to cigarettes 100 of different diameters, enhancing the system's versatility.
[0031] Furthermore, an exhaust component is provided at the bottom of the flue gas guide pipe. Multiple exhaust holes are circumferentially formed on the exhaust component, and all exhaust holes are connected to the inner cavity of the flue gas guide pipe. This allows the flue gas to uniformly diffuse from bottom to top into the extractant through the multiple exhaust holes, effectively increasing the contact area between the flue gas and the extractant, ensuring that particulate matter in the flue gas is efficiently captured by the extractant. For example, in this embodiment, the exhaust component is spherical, and multiple exhaust holes are uniformly arrayed on the spherical surface.
[0032] Optionally, in this embodiment, a drain valve 16 is also provided at the drain outlet, and the drain valve 16 is linked to the liquid level sensor. In specific use, after a set number of cigarettes 100 are smoked, the drain valve 16 at the bottom of the extraction bottle 12 is opened, allowing the extract containing the extracted target components to slowly drip into the receiving part of the sample delivery component 3 located directly below it. At the same time, the liquid level sensor detects the liquid level information inside the extraction bottle 12. When the liquid level sensor detects that the liquid level of the extract has dropped to the second preset position, the liquid level sensor immediately sends a liquid level attainment signal to the control system. After receiving the attainment signal, the control system immediately sends a closing command to the drain valve 16, causing the drain valve 16 to close automatically.
[0033] It should be noted that before opening the drain valve 16, the operator can also preset the threshold for terminating the draining of the extract, i.e., the second preset position, through the control system. When the level sensor detects that the extract level has dropped to the second preset position, it immediately sends a level compliance signal to the control system. After receiving the compliance signal, the control system sends a closing command to the drain valve 16, causing the drain valve 16 to close automatically, completing the quantitative export of the extract for a single test. This ensures the consistency and repeatability of the extract volume for each test, thereby maintaining high test accuracy.
[0034] Optionally, in this embodiment, the suction assembly 2 specifically includes a suction unit 21, a suction pipe 22, and a suction valve. The suction port of the suction unit 21 is connected to one end of the suction pipe 22, and the other end of the suction pipe 22 is connected to the extraction bottle 12. The suction unit 21 can draw in smoke through the suction pipe 22. The suction valve and the liquid inlet valve are linked and their opening and closing states are different. In practical use, when the liquid inlet valve is closed and the air intake valve is open, the suction unit 21 can smoke according to the preset suction program. When the liquid inlet valve is open and the air intake valve is closed, the system can perform a cleaning operation on the smoke guide tube. That is, after smoking one cigarette 100, the cigarette butt is removed, the air intake valve is closed, the liquid inlet valve is opened, and the control system sends a start command to the drive pump 14, so that the drive pump 14 can pressurize the ambient air into the liquid inlet pipe 13 and slowly deliver it to the extraction bottle 12 along the liquid inlet pipe 13, so that the extract liquid in the extraction bottle 12 slowly enters the smoke guide tube. At this time, the liquid level sensor can detect the drop in the liquid level of the extract liquid. When the liquid level drops to the lower limit, the drive pump 14 stops pressurizing and opens the air intake valve, so that the liquid level in the smoke guide tube drops, thereby extracting the nicotine remaining on the inner wall of the smoke guide tube and improving the accuracy of the detection data.
[0035] Preferably, the above cleaning operation is repeated 3 times to thoroughly remove nicotine from the inner wall of the flue gas guide pipe.
[0036] More specifically, in this embodiment, the suction unit 21 includes a syringe and a gas collection bag, wherein the suction end of the syringe is sealed to one end of the suction tube 22, and the exhaust end of the syringe is sealed to the gas collection bag. In actual operation, the syringe can drive the piston to reciprocate through a drive mechanism (such as a stepper motor) to simulate the human suction action; when the syringe piston is pulled outward, a negative pressure is formed in the extraction bottle 12, and the mainstream smoke generated by the lit cigarette 100 is injected into the extraction liquid through the smoke guide tube under the action of negative pressure and completes the extraction. Subsequently, the smoke carrying the unextracted gaseous components enters the syringe through the suction tube 22. When the syringe piston is pushed inward, the smoke in the syringe can be pressed into the gas collection bag for collection, realizing the distributed suction and temporary storage of smoke, thereby reducing the leakage of harmful smoke, improving the laboratory operating environment, and protecting the health of personnel.
[0037] Optionally, in this embodiment, the sample delivery component 3 specifically includes a chromatographic vial 31 and a robotic arm 32. The chromatographic vial 31 is configured as the aforementioned receiving section and is used to hold the extract containing the target component. The end effector of the robotic arm 32 is detachably connected to the chromatographic vial 31, and the robotic arm 32 is used to transfer the chromatographic vial 31 into the analytical device. The robotic arm 32 is electrically connected to the control system, thereby driving the chromatographic vial 31 to complete the automated action process of receiving the extract → transferring it to the analytical device → resetting and waiting under the operation instructions of the control system. Through the above settings, the positional accuracy of multiple sample transfers can be ensured, making the system better adaptable to the needs of high-throughput continuous detection.
[0038] It should be further explained that, in this embodiment, after the robotic arm 32 transfers the chromatographic bottle 31 containing the extractant, it will receive the waste liquid bottle and move it to the lower part of the drain valve 16. At the same time, the control system opens the drain valve 16 to empty the waste liquid in the extraction bottle 12. Then, it controls the inlet valve and the drive pump 14 to open, and uses the drive pump 14 to draw the extractant in the storage tank 11 into the extraction bottle 12 to clean the extraction bottle 12. The cleaned waste liquid will flow into the waste liquid bottle for collection to complete one experimental procedure.
[0039] This embodiment also provides a method for detecting the mainstream smoke components of cigarettes, using the aforementioned cigarette mainstream smoke component detection system to detect the mainstream smoke components of cigarette 100. The detection method specifically includes the following steps: S1. Use the storage tank 11 to quantitatively deliver the extract to the extraction bottle 12.
[0040] In specific operation, a fixed amount of extractant is first pre-filled into the storage tank 11. The outlet of the storage tank 11 is connected to the top side wall of the extraction bottle 12 via the inlet pipe 13, and an inlet valve is provided on the inlet pipe 13. The drive pump 14 is connected to the gas phase space of the storage tank 11, so that when the inlet valve is opened, the drive pump 14 can inject a fixed amount of extractant from the storage tank 11 into the extraction bottle 12 through the inlet pipe 13. At the same time, a liquid level sensor is provided in the extraction bottle 12. When the liquid level reaches the first preset position, the drive pump 14 reverses to draw the extractant remaining in the inlet pipe 13 back into the storage tank 11, and then the inlet valve is closed, so that the extraction bottle 12 can form a sealed cavity.
[0041] S2. Insert cigarette 100 into the cigarette inlet located at one end of extraction bottle 12 and light cigarette 100.
[0042] In specific operation, a sealing lip 15 is provided at the cigarette interface. The sealing lip 15 is detachably connected to the cigarette 100. After the first cigarette 100 is placed in the sealing lip 15, the cigarette 100 is lit.
[0043] S3. Using the suction component 2, start smoking according to the preset suction program. The smoke generated by the cigarette 100 can pass through the extraction liquid and achieve the extraction of the target components.
[0044] In specific operation, a smoke guide tube is provided between the sealing lip 15 and the extractant in the extraction bottle 12. Under the suction of the suction component 2, the smoke generated after the cigarette 100 is lit can be directly dissolved into the extractant through the smoke guide tube to achieve the extraction of the target components in the smoke.
[0045] S4. After cigarette 100 is smoked, the drain port at the bottom of the extraction bottle 12 is opened to discharge the extract containing the target component into the sample delivery component 3.
[0046] In specific operation, after the set number of cigarettes 100 are smoked, the drain valve 16 at the bottom of the extraction bottle 12 is opened, allowing the extract containing the target component to slowly drip into the chromatography bottle 31 located directly below the drain valve 16. When the liquid level sensor detects that the liquid level has dropped to the lower limit, the control system immediately controls the drain valve 16 to close, ensuring that the sample dripped into the chromatography bottle 31 is accurate and in appropriate quantity.
[0047] S5. Use sample delivery component 3 to transfer the extract containing the target component to the analytical device for detection.
[0048] In actual operation, the sample is transferred to the analysis device by the robotic arm 32 for automatic gas or liquid phase detection. After the sample is transferred, the robotic arm 32 can also connect the waste liquid bottle to the lower part of the drain valve 16, open the drain valve 16 to empty the waste liquid in the extraction bottle 12, and automatically clean the extraction bottle 12 at least twice, and then automatically enter the next round of detection experiment.
[0049] The method for detecting mainstream cigarette smoke components provided in this embodiment eliminates the need for using, replacing, or disposing of Cambridge filters, fundamentally avoiding problems such as uneven filter adsorption, transfer loss, and solvent residue. This significantly shortens sample pretreatment time and improves efficiency. Furthermore, the smoke can be directly passed into the low-temperature extraction solution, allowing particulate matter to rapidly condense and dissolve in the liquid environment, resulting in a larger contact area and higher mass transfer efficiency, effectively improving the recovery rate and detection sensitivity of target components (such as nicotine). In addition, the entire process, from extraction solution injection, 100 puffs of cigarette smoke, extraction completion, to extraction solution transfer, is automatically executed under program control, ensuring highly consistent experimental conditions. This significantly improves data repeatability and reliability, laying the foundation for building a fully automated smoke analysis workstation.
[0050] It should also be noted that, in this embodiment, the following operational steps are included between step S3 and step S4: A. After smoking the first cigarette 100, remove the cigarette butt, close the inhalation tube 22, open the liquid inlet tube 13, and use the drive pump 14 to slowly apply positive pressure from the liquid inlet tube 13 to the extraction bottle 12, allowing the extract in the extraction bottle 12 to slowly enter the smoke guide tube. When the liquid level sensor detects that the liquid level of the extract has dropped to the second preset position, stop applying pressure and open the inhalation tube 22, causing the liquid level in the smoke guide tube to drop. This step can be repeated multiple times, for example, 3 times, until the residual nicotine on the inner wall of the smoke guide tube is completely removed, which can greatly enhance the accuracy of the detection data.
[0051] Then, repeat steps S2, S3 and A, automatically sucking a specified number of cigarettes 100 according to the detection method. After sucking multiple cigarettes 100, proceed to step S4.
[0052] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.
Claims
1. A system for detecting mainstream components of cigarette smoke, characterized in that, include: The extraction assembly (1) includes a storage tank (11) and an extraction bottle (12). The storage tank (11) is connected to the extraction bottle (12). The storage tank (11) is used to store the extract and can quantitatively deliver the extract to the extraction bottle (12). One end of the extraction bottle (12) is provided with a cigarette interface for detachably connecting a cigarette (100). The gas outlet of the cigarette interface extends to below the liquid level of the extract in the extraction bottle (12). The bottom end of the extraction bottle (12) is provided with a drain port for discharging the extract containing the target component. The suction component (2) is connected to the extraction bottle (12) and can draw the lit cigarette (100) according to the preset suction program so that the smoke generated by the cigarette (100) can pass through the extraction liquid and achieve the extraction of the target component; The sample delivery component (3) is movably disposed between the drain port and the analytical device and is used to transfer the extract containing the target component to the analytical device.
2. The cigarette mainstream smoke component detection system according to claim 1, characterized in that, The extraction assembly (1) further includes a sealing lip (15) and a smoke guide tube. The sealing lip (15) is sealed at the cigarette interface. The cigarette (100) is detachably inserted into the sealing lip (15). The top end of the smoke guide tube is connected to the sealing lip (15), and the bottom end of the smoke guide tube extends to below the surface of the extraction liquid in the extraction bottle (12).
3. The cigarette mainstream smoke component detection system according to claim 2, characterized in that, The bottom end of the flue gas guide pipe is provided with an exhaust component, and the exhaust component has multiple exhaust holes along the circumference. All the exhaust holes are connected to the inner cavity of the flue gas guide pipe.
4. The cigarette mainstream smoke component detection system according to claim 2, characterized in that, An inlet pipe (13) is connected between the outlet of the storage tank (11) and the extraction bottle (12). The inlet pipe (13) is equipped with an inlet valve and a drive pump (14). The drive pump (14) is used to inject the extract from the storage tank (11) into the extraction bottle (12) through the inlet pipe (13) when the inlet valve is opened.
5. The cigarette mainstream smoke component detection system according to claim 4, characterized in that, The extraction bottle (12) is equipped with a liquid level sensor, which is linked to the drive pump (14). The liquid level sensor is used to detect the liquid level information in the extraction bottle (12). When the liquid level of the extract in the extraction bottle (12) rises to the first preset position, the delivery pump can drive the motor to run in reverse so as to draw the remaining extract in the inlet pipe (13) back into the storage tank (11).
6. The cigarette mainstream smoke component detection system according to claim 5, characterized in that, The suction assembly (2) includes a suction unit (21), a suction pipe (22) and a suction valve. The suction port of the suction unit (21) is connected to one end of the suction pipe (22), and the other end of the suction pipe (22) is connected to the extraction bottle (12). The suction unit (21) can suck the flue gas through the suction pipe (22). The suction valve is linked to the liquid inlet valve, and their opening and closing states are different.
7. The cigarette mainstream smoke component detection system according to claim 6, characterized in that, The suction unit (21) includes a syringe and a gas collection bag. The suction end of the syringe is sealed to one end of the suction tube (22), and the exhaust end of the syringe is sealed to the gas collection bag.
8. The cigarette mainstream smoke component detection system according to claim 5, characterized in that, A drain valve (16) is provided at the drain port. The drain valve (16) is linked to the liquid level sensor. When the liquid level of the extract in the extraction bottle (12) drops to the second preset position, the drain valve (16) can switch to the closed state.
9. The cigarette mainstream smoke component detection system according to claim 1, characterized in that, The sample delivery assembly (3) includes a chromatographic vial (31) and a robotic arm (32). The chromatographic vial (31) is used to hold the extract containing the target component. The end effector of the robotic arm (32) is detachably connected to the chromatographic vial (31). The robotic arm (32) is used to transfer the chromatographic vial (31) to the analytical device.
10. A method for detecting mainstream components of cigarette smoke, characterized in that, The method is implemented using the cigarette mainstream smoke component detection system as described in any one of claims 1-9, and includes the following steps: The extract is metered into the extraction bottle (12) using the storage tank (11); Insert the cigarette (100) into the cigarette inlet located at one end of the extraction bottle (12) and light the cigarette (100); Using the suction component (2), smoke is started according to the preset suction program. The smoke generated by the cigarette (100) can pass through the extract liquid and achieve the extraction of the target components. After the cigarette (100) is smoked, the drain port at the bottom of the extraction bottle (12) is opened to discharge the extract containing the target component to the sample delivery assembly (3). The extract containing the target component is transferred to the analytical device for detection using the sample delivery component (3).