Online characterization system and method for substances on micro-droplet gas-liquid interface
Through the combination of the acoustic suspension component and the spectral mass spectrometry component, online characterization and real-time detection of the micro droplet gas-liquid interface are achieved, solving the problem that the material changes in the micro droplet gas-liquid interface in the prior art cannot be detected in real time, and improving the analysis accuracy and depth of research on the reaction mechanism.
Patent Information
- Application Number
- CN202510366745.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-07-11
AI Technical Summary
The prior art cannot effectively detect and characterize material changes, presence status and chemical reaction information at the gas-liquid interface of micro droplets in real time.
The acoustic suspension assembly is used to combine spectral and mass spectroscopy detection assembly, and micro droplets are suspended in the reaction chamber by ultrasonic waves, and the online analysis is performed using spectroscopy and mass spectrometry, integrating the synchronous detection of infrared and confocal Raman spectroscopy.
The online characterization and real-time detection of the micro droplet gas-liquid interface are realized, which improves the accuracy of the analysis results, can capture dynamic changes in the reaction process, reveal the reaction mechanism, and reduce chemical and thermal pollution.
Smart Images
Figure CN120294119A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of micro-droplet detection, and particularly relates to an on-line characterization system and method for substances at the gas-liquid interface of micro-droplets. Background Art
[0002] Micro-droplets provide a rich gas-liquid interface, and many substances exhibit the minimum free energy at these interfaces, thus creating a favorable environment for chemical reactions. In recent years, some wonderful properties have been discovered at the gas-liquid interface of micro-droplets, and scientific research at this interface has received extensive attention.
[0003] However, it is difficult to detect in real time information such as the material changes, existing states, and action sites at the gas-liquid interface of micro-droplets, and it is also impossible to on-line characterize the chemical reactions and intermediate information at the interface. At present, a variety of spectroscopic methods such as infrared and confocal Raman spectroscopy are considered important characterization means for studying reactions at the gas-liquid interface, but no device that can effectively combine these spectroscopic methods has been developed on the market. Based on the above situation, there is an urgent need to develop an on-line characterization system that can perform multiple characterizations on substances at the gas-liquid interface of micro-droplets. Summary of the Invention
[0004] The purpose of the present invention is to provide an on-line characterization system and method for substances at the gas-liquid interface of micro-droplets, aiming to solve the technical problems in the existing technology that it is impossible to on-line characterize and detect in real time substances at the gas-liquid interface of micro-droplets.
[0005] To achieve the above purpose, the technical solution adopted by the present invention is: to provide an on-line characterization system for substances at the gas-liquid interface of micro-droplets, including an acoustic levitation assembly, one side of the acoustic levitation assembly is connected to a sampling assembly, and a spectroscopic detection assembly and a mass spectrometry detection assembly are arranged on the side surface of the acoustic levitation assembly.
[0006] In one embodiment, the acoustic levitation assembly is provided with an acoustic levitation reaction chamber, and ultrasonic transducers are arranged at both the bottom and the top of the acoustic levitation reaction chamber.
[0007] In one embodiment, the inner wall of the acoustic levitation reaction chamber is coated with a hydrophobic coating.
[0008] In one embodiment, the sampling assembly is provided with a sampling tube, and the sampling tube is connected to the acoustic levitation reaction chamber.
[0009] In one embodiment, the side wall of the acoustic levitation reaction chamber is arranged to be light-transmissive.
[0010] In one embodiment, the spectroscopic detection assembly is provided with a light source and a spectrometer, the light source and the spectrometer are arranged opposite to each other, and the light emitted by the light source passes through the side wall of the acoustic levitation reaction chamber and shoots towards the spectrometer.
[0011] In one embodiment, the mass spectrometry detection component is provided with a mass spectrometer, a transfer tube is provided on the mass spectrometer, and the other end of the transfer tube communicates with the acoustic levitation reaction chamber.
[0012] In one embodiment, the mass spectrometry detection component is further provided with a gas passage, the gas passage communicates with the acoustic levitation reaction chamber, and the gas in the gas passage blows towards the transfer tube.
[0013] In one embodiment, a temperature and humidity control component is further provided on the side wall of the acoustic levitation reaction chamber. The temperature and humidity control component is provided with a temperature and humidity controller, and a temperature and humidity sensor is provided on the temperature and humidity controller. The temperature and humidity sensor passes through the acoustic levitation reaction chamber and is located inside the acoustic levitation reaction chamber.
[0014] The present invention also provides an on-line characterization method for substances at the gas-liquid interface of microdroplets. Using the on-line characterization system for substances at the gas-liquid interface of microdroplets described in any one of the above, the method includes the following steps:
[0015] S1: Introduce the microdroplets into the sampling tube, and turn on the ultrasonic transducer so that the microdroplets are in a suspended state.
[0016] S2: At the same time, introduce gas into the gas passage, a gas-liquid interface is formed on the surface of the microdroplets, and the sample molecules in the microdroplets react at the gas-liquid interface.
[0017] S3: When performing spectral detection, turn on the light source and the spectrometer. The light emitted by the light source passes through the side wall of the acoustic levitation reaction chamber and shoots towards the suspended microdroplets, and then passes through the microdroplets and shoots towards the spectrometer to realize spectral analysis of the substances at the gas-liquid interface of the microdroplets.
[0018] When performing mass spectrometry detection, turn on the mass spectrometer. Under the action of the gas, the suspended microdroplets are sent into the transfer tube and then enter the mass spectrometer for detection to realize mass spectrometry analysis of the substances at the gas-liquid interface of the microdroplets.
[0019] The present invention provides an on-line characterization system and method for substances at the gas-liquid interface of microdroplets. Compared with the prior art, the beneficial effects of the present invention are:
[0020] (1) The present invention combines the reaction and detection at the gas-liquid interface of microdroplets, achieving on-line characterization, real-time detection, and in-situ analysis of substances at the gas-liquid interface of microdroplets, improving the accuracy of analysis results. In addition, during the detection process, the reaction time of the reaction at the gas-liquid interface of microdroplets can be controlled by adjusting the gas flow rate, enabling the capture of dynamic changes during the reaction, realizing on-line real-time detection and dynamic detection of the reaction, and deeply studying the reaction process and reaction mechanism. Moreover, the present invention integrates the synchronous analysis functions of mass spectrometry and multiple spectra (such as infrared and confocal Raman spectra). The combined use of mass spectrometry and spectra can on-line real-time detect various intermediates during the reaction process and comprehensively reveal the reaction mechanism.
[0021] (2) The present invention uses acoustic levitation technology to levitate microdroplets in an acoustic levitation reaction chamber, avoiding the contact between the microdroplets and the solid wall of the acoustic levitation reaction chamber, reducing chemical and thermal contamination, and improving the accuracy of analysis results.
[0022] (3) The present invention uses a temperature and humidity control component to precisely control the temperature and humidity in the acoustic levitation reaction chamber, ensuring that the particle size of the microdroplets remains stable during the reaction and detection processes, providing an ideal environment for the gas-liquid interface reaction. Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0024] Figure 1 It is a schematic structural diagram of an on-line characterization system for substances at the gas-liquid interface of microdroplets provided in an embodiment of the present application;
[0025] Figure 2 For Figure 1 The schematic structural diagram of the usage state of the on-line characterization system for substances at the gas-liquid interface of microdroplets shown.
[0026] Symbol description in the figure:
[0027] 1. Acoustic levitation component; 101. Acoustic levitation reaction chamber; 102. Ultrasonic transducer; 103. Hydrophobic coating; 104. Power supply;
[0028] 2. Sampling component; 201. Sampling tube;
[0029] 3. Spectral detection component; 301. Light source; 302. Spectrometer;
[0030] 4. Mass spectrometry detection component; 401. Mass spectrometer; 402. Transfer tube; 403. Gas passage;
[0031] 5. Temperature and humidity control component; 501. Temperature and humidity controller; 502. Temperature and humidity sensor;
[0032] 6. Microdroplet;
[0033] 7. Gas. Detailed implementation manners
[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.
[0035] It should be noted that when an element is referred to as "fixed" or "disposed" with another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected" with another element, it can be directly connected to the other element or indirectly connected to the other element.
[0036] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, and cannot be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0037] (1) On-line characterization system for substances at the gas-liquid interface of microdroplets
[0038] The first aspect of the embodiments of this application provides an on-line characterization system for substances at the gas-liquid interface of microdroplets.
[0039] Please refer to Figure 1 , which is a schematic structural diagram of an on-line characterization system for substances at the gas-liquid interface of microdroplets provided by an embodiment of this application. For the convenience of description, only the parts related to this embodiment are shown and are described in detail as follows:
[0040] In one of the embodiments, please combine Figure 2, An on-line characterization system for substances at the gas-liquid interface of micro-droplets, comprising an acoustic levitation assembly 1. One side of the acoustic levitation assembly 1 is connected to a sample injection assembly 2, and a spectral detection assembly 3 and a mass spectrometry detection assembly 4 are arranged on the side surface of the acoustic levitation assembly 1. The sample injection assembly 2 introduces micro-droplets 6 into the acoustic levitation assembly 1. The acoustic levitation assembly 1 uses acoustic levitation technology to levitate the micro-droplets 6, forming a gas-liquid interface on the surface of the micro-droplets 6. The sample molecules in the micro-droplets 6 react at the gas-liquid interface; the spectral detection assembly 3 performs spectral analysis on the levitated micro-droplets 6, and the mass spectrometry detection assembly 4 performs mass spectrometry analysis on the levitated micro-droplets 6.
[0041] By combining the reaction and detection at the gas-liquid interface of the micro-droplets 6, on-line characterization, real-time detection and in-situ analysis of substances at the gas-liquid interface of the micro-droplets 6 are realized, improving the accuracy of the analysis results; in addition, during the detection process, by adjusting the flow rate of the gas 7, the reaction time of the reaction at the gas-liquid interface of the micro-droplets 6 can be controlled, the dynamic changes during the reaction can be captured, on-line real-time detection and dynamic detection of the reaction can be realized, and the reaction process and reaction mechanism can be deeply studied; furthermore, by integrating the synchronous analysis functions of mass spectrometry and multiple spectra, the combined use of mass spectrometry and spectra can on-line real-time detect multiple intermediates during the reaction process, and comprehensively reveal the reaction mechanism.
[0042] Specifically, please refer to Figure 1 - Figure 2 , The acoustic levitation assembly 1 is provided with an acoustic levitation reaction chamber 101. Ultrasonic transducers 102 are arranged at both the bottom and the top of the acoustic levitation reaction chamber 101. The ultrasonic transducers 102 are electrically connected to a power supply 104. The acoustic levitation assembly 1 uses acoustic levitation technology to levitate the micro-droplets 6 in the acoustic levitation reaction chamber 101. The ultrasonic transducers 102 are purchased from the market, and the number thereof can be single or multiple, depending on the specific situation. By adjusting parameters such as the frequency and wavelength of the ultrasonic transducers 102, precise levitation and manipulation of the micro-droplets 6 can be achieved.
[0043] A hydrophobic coating 103 is coated on the inner wall of the acoustic levitation reaction chamber 101. The hydrophobic coating 103 can prevent the micro-droplets 6 from contacting the solid wall of the acoustic levitation reaction chamber 101 during the levitation process, reducing chemical and thermal pollution and improving the accuracy of the analysis results.
[0044] The sample injection assembly 2 is provided with a sample injection tube 201, and the sample injection tube 201 is communicated with the acoustic levitation reaction chamber 101. The sample injection tube 201 is directly communicated with a micro-droplet generating device. The sample solution generates micro-droplets 6 through the micro-droplet generating device and is introduced into the acoustic levitation reaction chamber 101 through the sample injection tube 201; the micro-droplet generating device can be an atomizer or other devices, and can be purchased as a finished product from the market or can be self-made, depending on the specific situation.
[0045] The side wall of the acoustic levitation reaction chamber 101 is made translucent. The side wall can achieve the light transmission performance by selecting materials such as quartz glass, optical glass, sapphire glass, etc. The spectral detection component 3 can perform real-time detection on the suspended micro-droplets 6 through the translucent side wall, obtain spectral information, and will not interfere with the suspension state of the micro-droplets 6 or the chemical reaction on the gas-liquid interface.
[0046] The spectral detection component 3 is provided with a light source 301 and a spectrometer 302. The light source 301 and the spectrometer 302 are arranged oppositely. The light emitted by the light source 301 passes through the side wall of the acoustic levitation reaction chamber 101 and shoots towards the spectrometer 302. The spectrometer 302 is used to receive the light source 301 passing through the micro-droplets 6 and decompose it into spectra of different wavelengths, so as to analyze the optical characteristics of the substances on the gas-liquid interface of the micro-droplets 6 and realize the spectral analysis of the substances on the gas-liquid interface of the micro-droplets 6. The spectrometer 302 can be an infrared spectrometer, a Raman spectrometer, or other types of spectrometers, and actual operation is adjusted adaptively according to the actual situation.
[0047] The mass spectrometry detection component 4 is provided with a mass spectrometer 401. A transfer tube 402 is provided on the mass spectrometer 401. The other end of the transfer tube 402 is communicated with the acoustic levitation reaction chamber 101. The mass spectrometry detection component 4 is also provided with a gas passage 403. The gas passage 403 is communicated with the acoustic levitation reaction chamber 101. The gas 7 in the gas passage 403 blows towards the transfer tube 402. The gas 7 is introduced into the acoustic levitation reaction chamber 101 through the gas passage 403 to create different gas-phase environments, form a gas-liquid interface on the surface of the micro-droplets 6, and the sample molecules in the micro-droplets 6 react at the gas-liquid interface. In addition, the gas 7 also has the function of controlling the advancing direction of the micro-droplets 6. Under the action of the gas 7, the suspended micro-droplets 6 are sent into the transfer tube 402 and then enter the mass spectrometer 401 for detection, realizing the mass spectrometry analysis of the substances on the gas-liquid interface of the micro-droplets 6.
[0048] During the detection process, by adjusting the flow rate of the gas 7, the reaction time of the reaction on the gas-liquid interface of the micro-droplets 6 can be controlled, the dynamic changes during the reaction can be captured, the on-line real-time detection and dynamic detection of the reaction can be realized, and the reaction process and reaction mechanism can be studied in depth.
[0049] A temperature and humidity control component 5 is also provided on the side wall of the acoustic levitation reaction chamber 101. The temperature and humidity control component 5 is provided with a temperature and humidity controller 501. A temperature and humidity sensor 502 is provided on the temperature and humidity controller 501. The temperature and humidity sensor 502 passes through the acoustic levitation reaction chamber 101 and is located inside the acoustic levitation reaction chamber 101. By precisely controlling the temperature and humidity in the acoustic levitation reaction chamber 101 by using the temperature and humidity control component 5, it is ensured that the particle size of the micro-droplets 6 remains stable during the reaction and detection process, providing an ideal environment for the gas-liquid interface reaction.
[0050] During use, the sample solution generates micro-droplets 6 through the micro-droplet generating device and is introduced into the acoustic levitation reaction chamber 101 through the sampling tube 201. At the same time, the gas 7 is introduced into the acoustic levitation reaction chamber 101 through the gas passage 403 to create a gas phase environment, forming a gas-liquid interface on the surface of the micro-droplets 6, and the sample molecules in the micro-droplets 6 react at the gas-liquid interface. At this time, when performing spectral detection, the light source 301 and the spectrometer 302 are turned on. The light emitted by the light source 301 passes through the side wall of the acoustic levitation reaction chamber 101 and shoots towards the suspended micro-droplets 6, and then passes through the micro-droplets 6 and shoots towards the spectrometer 302, realizing the spectral analysis of the substances on the gas-liquid interface of the micro-droplets 6. When performing mass spectrometry detection, the mass spectrometer 401 is turned on. Under the action of the gas 7, the suspended micro-droplets 6 are sent into the transfer tube 402 and then enter the mass spectrometer 401 for detection, realizing the mass spectrometry analysis of the substances on the gas-liquid interface of the micro-droplets 6.
[0051] (2) On-line characterization method for substances at the gas-liquid interface of micro-droplets
[0052] The second aspect of the embodiments of the present application provides an on-line characterization method for substances at the gas-liquid interface of micro-droplets.
[0053] Please refer to Figure 1 - Figure 2 , an on-line characterization method for substances at the gas-liquid interface of micro-droplets, using the above-mentioned on-line characterization system for substances at the gas-liquid interface of micro-droplets, the method includes the following steps:
[0054] S1: Introduce the micro-droplets 6 into the sampling tube 201 and turn on the ultrasonic transducer 102, and the micro-droplets 6 are in a suspended state.
[0055] Specifically, the sampling tube 201 is directly connected to the micro-droplet generating device. The sample solution generates micro-droplets 6 through the micro-droplet generating device and is introduced into the acoustic levitation reaction chamber 101 through the sampling tube 201. At the same time, the ultrasonic transducer 102 is turned on, and the micro-droplets 6 are suspended in the acoustic levitation reaction chamber 101 by using acoustic levitation technology, that is, "floating" in the air.
[0056] The micro-droplet generating device can be an atomizer or other devices, which can be purchased as finished products on the market or made by oneself, depending on the specific situation. The ultrasonic transducer 102 is purchased from the market, and the number thereof can be single or multiple, depending on the specific situation. By adjusting parameters such as the frequency and wavelength of the ultrasonic transducer 102, precise suspension and control of the micro-droplets 6 can be achieved.
[0057] S2: At the same time, introduce the gas 7 into the gas passage 403, a gas-liquid interface is formed on the surface of the micro-droplets 6, and the sample molecules in the micro-droplets 6 react at the gas-liquid interface.
[0058] Specifically, simultaneously, gas 7 is introduced into the acoustic levitation reaction chamber 101 through the gas passage 403 to create a gas phase environment, form a gas-liquid interface on the surface of the micro-droplet 6, and the sample molecules in the micro-droplet 6 react at the gas-liquid interface.
[0059] S3: When performing spectral detection, turn on the light source 301 and the spectrometer 302. The light emitted by the light source 301 passes through the side wall of the acoustic levitation reaction chamber 101 and shoots towards the suspended micro-droplet 6, and then passes through the micro-droplet 6 and shoots towards the spectrometer 302 to achieve spectral analysis of the substances on the gas-liquid interface of the micro-droplet 6.
[0060] When performing mass spectrometry detection, turn on the mass spectrometer 401. Under the action of the gas 7, the suspended micro-droplet 6 is sent into the transfer tube 402 and then enters the mass spectrometer 401 for detection to achieve mass spectrometry analysis of the substances on the gas-liquid interface of the micro-droplet 6.
[0061] Specifically, when performing spectral detection, turn on the light source 301 and the spectrometer 302. The light emitted by the light source 301 passes through the side wall of the acoustic levitation reaction chamber 101 and shoots towards the suspended micro-droplet 6, and then passes through the micro-droplet 6 and shoots towards the spectrometer 302 to achieve spectral analysis of the substances on the gas-liquid interface of the micro-droplet 6. The spectrometer 302 can be an infrared spectrometer, a Raman spectrometer, or other types of spectrometers, and is adjusted adaptively according to the actual situation during actual operation.
[0062] When performing mass spectrometry detection, turn on the mass spectrometer 401. Under the action of the gas 7, the suspended micro-droplet 6 is sent into the transfer tube 402 and then enters the mass spectrometer 401 for detection to achieve mass spectrometry analysis of the substances on the gas-liquid interface of the micro-droplet 6. During the detection process, by adjusting the flow rate of the gas 7, the reaction time of the reaction on the gas-liquid interface of the micro-droplet 6 can be controlled, the dynamic changes during the reaction can be captured, on-line real-time detection and dynamic detection of the reaction can be achieved, and the reaction process and reaction mechanism can be studied in depth.
[0063] In summary, the present invention provides an on-line characterization system and method for substances at the gas-liquid interface of microdroplets. Compared with the prior art, (1) the present invention combines the reaction and detection at the gas-liquid interface of microdroplets, realizing the on-line characterization, real-time detection and in-situ analysis of substances at the gas-liquid interface of microdroplets, and improving the accuracy of the analysis results. In addition, during the detection process, the reaction time of the reaction at the gas-liquid interface of microdroplets can be controlled by adjusting the gas flow rate, enabling the capture of dynamic changes during the reaction, realizing the on-line real-time detection and dynamic detection of the reaction, and deeply studying the reaction process and reaction mechanism. Moreover, the present invention integrates the synchronous analysis functions of mass spectrometry and multiple spectra (such as infrared and confocal Raman spectra). The combined use of mass spectrometry and spectra can on-line real-time detect various intermediates during the reaction process and comprehensively reveal the reaction mechanism. (2) The present invention uses acoustic levitation technology to levitate microdroplets in an acoustic levitation reaction chamber, avoiding the contact between the microdroplets and the solid wall of the acoustic levitation reaction chamber, reducing chemical and thermal pollution, and improving the accuracy of the analysis results. (3) The present invention uses a temperature and humidity control component to precisely control the temperature and humidity in the acoustic levitation reaction chamber, ensuring that the particle size of the microdroplets remains stable during the reaction and detection processes, and providing an ideal environment for the gas-liquid interface reaction.
[0064] The present invention has broad application prospects in multiple fields, including life science, origin of life, interfacial chemistry, new drug development, and atmospheric environment detection, etc. By stably levitating microdroplets in an acoustic levitation reaction chamber and combining various means such as mass spectrometry, infrared, and confocal Raman spectra for analysis, researchers can obtain more comprehensive reaction information, realize the on-line characterization of substances at the gas-liquid interface of microdroplets, and can also on-line real-time capture reaction intermediates, comprehensively reveal the reaction mechanism, and promote the scientific research progress in related fields.
[0065] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.
Claims
1. An on-line characterization system for substances at the gas-liquid interface of micro-droplets, characterized in that, It includes an acoustic levitation component (1), one side of the acoustic levitation component (1) is communicated with a sampling component (2), and a spectral detection component (3) and a mass spectrometry detection component (4) are arranged on the side surface of the acoustic levitation component (1).
2. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 1, wherein, The acoustic levitation component (1) is provided with an acoustic levitation reaction chamber (101), and ultrasonic transducers (102) are arranged at both the bottom and the top of the acoustic levitation reaction chamber (101).
3. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 2, characterized in that, A hydrophobic coating (103) is coated on the inner wall of the acoustic levitation reaction chamber (101).
4. The on-line characterization system for substances on the gas-liquid interface of micro-droplets according to claim 2, wherein The sampling component (2) is provided with a sampling tube (201), and the sampling tube (201) is communicated with the acoustic levitation reaction chamber (101).
5. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 2, wherein The side wall of the acoustic levitation reaction chamber (101) is arranged to be light-transmissive.
6. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 5, wherein The spectral detection component (3) is provided with a light source (301) and a spectrometer (302), the light source (301) and the spectrometer (302) are arranged oppositely, and the light emitted by the light source (301) passes through the side wall of the acoustic levitation reaction chamber (101) and shoots towards the spectrometer (302).
7. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 2, characterized in that, The mass spectrometry detection component (4) is provided with a mass spectrometer (401), a transfer tube (402) is arranged on the mass spectrometer (401), and the other end of the transfer tube (402) is communicated with the acoustic levitation reaction chamber (101).
8. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 7, characterized in that, The mass spectrometry detection component (4) is further provided with a gas passage (403), the gas passage (403) is communicated with the acoustic levitation reaction chamber (101), and the gas in the gas passage (403) blows towards the transfer tube (402).
9. The on-line characterization system for substances at the gas-liquid interface of micro-droplets according to claim 2, characterized in that, A temperature and humidity control component (5) is further arranged on the side wall of the acoustic levitation reaction chamber (101), the temperature and humidity control component (5) is provided with a temperature and humidity controller (501), a temperature and humidity sensor (502) is arranged on the temperature and humidity controller (501), and the temperature and humidity sensor (502) passes through the acoustic levitation reaction chamber (101) and is located inside the acoustic levitation reaction chamber (101).
10. An on-line characterization method for substances at the gas-liquid interface of microdroplets, characterized in that, When using the on-line characterization system for substances on the gas-liquid interface of micro-droplets as described in any one of claims 2-9, the method includes the following steps: S1: Introduce the micro-droplet (6) into the sampling tube (201), turn on the ultrasonic transducer (102), and the micro-droplet (6) is in a suspended state; S2: At the same time, introduce the gas (7) into the gas passage (403), a gas-liquid interface is formed on the surface of the micro-droplet (6), and the sample molecules in the micro-droplet (6) react at the gas-liquid interface; S3: When performing spectral detection, turn on the light source (301) and the spectrometer (302), the light emitted by the light source (301) passes through the side wall of the acoustic levitation reaction chamber (101) and shoots towards the suspended micro-droplet (6), and then passes through the micro-droplet (6) and shoots towards the spectrometer (302), so as to realize spectral analysis of the substances on the gas-liquid interface of the micro-droplet (6); When performing mass spectrometry detection, turn on the mass spectrometer (401), under the action of the gas (7), the suspended micro-droplet (6) is sent into the transfer tube (402), and then enters the mass spectrometer (401) for detection, so as to realize mass spectrometry analysis of the substances on the gas-liquid interface of the micro-droplet (6).