Method for quantifying concentration of atomizing agent in aerosol

Abstract

The invention discloses a method for quantifying the concentration of an atomizing agent in aerosol. The method comprises the following steps: S1, generating aerosol; s2, introducing the generated aerosol into a measuring cavity, and measuring the transmissivity or scattering value; and S3, obtaining the concentration of the atomizing agent in the aerosol according to any one of the measured transmissivity or scattering value. According to the quantitative method provided by the invention, real-time, online, rapid and quantitative detection of the atomizing agent contained in the aerosol can be realized, the detection efficiency is high, and the operation is simple.

Description

Technical Field

[0001] The present application relates to the technical field of heated cigarette detection, and in particular to a method for quantifying the concentration of an atomizer in an aerosol. Background Art

[0002] Heated cigarettes that use air heating use a heating component to heat the inhaled cold air, and the heated hot air is then used to steam the tobacco products, thereby heating the tobacco to form smoke but keeping the tobacco from burning. This can not only achieve a sense of satisfaction similar to that of cigarettes, but also reduce the production of harmful substances during the combustion process. In recent years, it has been favored by consumers and has developed rapidly.

[0003] Traditional cigarettes produce aerosols by burning, while heated cigarettes produce aerosols by heating tobacco segments with atomizers added. Glycerol and 1,2-propylene glycol are the most important additives in the tobacco materials of heated cigarettes, which can trigger the formation of heated cigarette aerosols. Generally speaking, the amount of smoke from heated cigarettes is proportional to the content of glycerol and 1,2-propylene glycol in the tobacco materials.

[0004] The existing technology uses gas chromatography to detect the content of atomizers such as glycerol and 1,2-propylene glycol, which has high accuracy, but the operation is cumbersome and time-consuming, and it is difficult to meet the needs of online detection. Therefore, how to provide a fast and accurate measurement method is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In order to solve the above technical problems, the first purpose of the present invention is to provide a method for quantifying the concentration of aerosol in aerosol; the quantitative method provided by the present application can realize real-time, online, rapid and quantitative detection of the aerosol contained in the aerosol, with high detection efficiency and simple operation.

[0006] The technical solution provided by the present invention is as follows:

[0007] A method for quantifying the concentration of atomizer in an aerosol comprises the following steps:

[0008] S1. Produce aerosol;

[0009] S2, introducing the generated aerosol into the measurement chamber to measure the transmittance or scattering value;

[0010] S3. Obtain the concentration of the aerosol atomizer according to any one of the measured transmittance or scattering values.

[0011] Preferably, when the concentration of the aerosol atomizer is less than a preset value, the concentration of the aerosol atomizer is determined by either the transmittance or the scattering value;

[0012] When the concentration of the aerosol atomizer is greater than a preset value, the concentration of the aerosol atomizer is determined by the scattering value.

[0013] Preferably, after the transmittance or scattering value is obtained, it is compared with a predetermined calibration table to obtain the concentration of the aerosol in the aerosol.

[0014] Preferably, a single-frequency parallel incident light beam with an intensity of I0 and a wavelength of λ passes through the measurement cavity, and the transmitted light intensity I or the scattered light intensity I is measured. s ,

[0015] The transmittance is calculated based on the transmittance definition T = I / I0;

[0016] According to the scattered light intensity I s The ratio of the incident light intensity I0 to s / I0 calculates the scattering value.

[0017] Preferably, the wavelength λ of the incident light is 1 mm to 10 nm.

[0018] Preferably, the wavelength λ of the incident light is 400 nm to 760 nm.

[0019] Preferably, the wavelength λ of the incident light is 532±5 nm.

[0020] Preferably, after the measurement chamber is evacuated, the generated aerosol is introduced for measurement, and the chamber is evacuated again after the measurement is completed; the period from the introduction of the aerosol after evacuation to the discharge after the measurement is completed is considered as one mouthful, and the transmitted light intensity I and the scattered light intensity I of the aerosol-generated product are measured mouthful by mouthful. s .

[0021] Preferably, the number of mouthfuls of measurement is 7 to 15 mouthfuls, and the measurement data of mouthfuls 3 to 6 are used for calculation.

[0022] Preferably, after the aerosol is introduced into the measurement chamber, the average value from the 4th second to the 5th second is read as the transmitted light intensity I and the scattered light intensity I s .

[0023] The present application provides a method for quantitatively measuring the concentration of atomizer in an aerosol, comprising the following steps: S1, generating an aerosol; S2, introducing the generated aerosol into a measuring cavity, and measuring the transmittance or scattering value; S3, obtaining the concentration of atomizer in the aerosol according to any one of the measured transmittance or scattering value. The quantitative method provided by the present application can realize real-time, online, rapid and quantitative detection of atomizer contained in an aerosol, with high detection efficiency and simple operation.

[0024] The applicant has verified through experiments that the formation of heated cigarette smoke is related to the amount of atomizers such as 1,2-propylene glycol and glycerol added to the heated cigarette, and the concentration C of the smoke can reflect the concentration of 1,2-propylene glycol and glycerol in the smoke.

[0025] Furthermore, when the concentrations of 1,2-propylene glycol and glycerol are very high, that is, when the extinction is very large, if the concentrations of 1,2-propylene glycol and glycerol continue to increase, the transmittance T is close to 0, and the detection of the transmitted light can no longer effectively distinguish the change in the transmittance T. Therefore, the transmission method cannot effectively measure the higher concentrations of 1,2-propylene glycol and glycerol. Since the increased aerosol does not completely absorb the incident light, when the concentrations of 1,2-propylene glycol and glycerol are high, the scattering coefficient will increase accordingly, that is, the intensity of the scattered light gradually increases, and the changes in 1,2-propylene glycol and glycerol can be distinguished by detecting the change in the intensity of the scattered light. Therefore, the present application preferably determines the concentration of the aerosol in the aerosol as either the transmittance or the scattering value when the concentration of the aerosol in the aerosol is less than the preset value; when the concentration of the aerosol in the aerosol in the aerosol is greater than the preset value, the concentration of the aerosol in the aerosol is determined as the scattering value.

[0026] The preset value is determined based on the data obtained when determining the calibration table. For example, in the applicant's experiment, when the smoke (i.e., aerosol) atomizer content is above 2.84 mg / g, the transmittance result is not very accurate. At this time, the scattering value is used to obtain the atomizer concentration.

[0027] Preferably, during detection, the incident light wavelength λ is within the wavelength range of infrared light (760nm to 1mm), ultraviolet light (400nm to 10nm), and visible light (400nm to 760nm). More preferably, the incident light wavelength λ is within the wavelength range of visible light (400nm to 760nm). More preferably, the incident light wavelength λ is 532±5nm.

[0028] The calibration table can be obtained by the applicant's experimental method or other methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is the standard deviation of transmittance of Hubei heated cigarette samples in the embodiment of the present invention;

[0031] Figure 2 is the standard deviation of the scattering value of the Hubei heated cigarette sample in the embodiment of the present invention;

[0032] Figure 3 is the standard deviation of the transmittance of the IQOS heated cigarette samples in the embodiment of the present invention;

[0033] Figure 4 is the standard deviation of the scattering value of the IQOS heated cigarette sample in the embodiment of the present invention;

[0034] Figure 5 is the average transmittance of heated cigarette samples with different atomizer contents in the embodiments of the present invention;

[0035] Figure 6 is the standard deviation of transmittance of heated cigarette samples with different atomizer contents in the embodiments of the present invention;

[0036] Figure 7 is the average transmittance of 1 to 9 puffs of heated cigarette samples with different atomizer contents in the embodiments of the present invention;

[0037] Figure 8 is the average of the scattering values ​​of 1 to 9 puffs of heated cigarette samples with different atomizer contents in the embodiments of the present invention;

[0038] Fig. 9 is the relative standard deviation of transmittance of 1 to 9 puffs of heated cigarette samples with different atomizer contents in the embodiments of the present invention;

[0039] Fig.10 is the relative standard deviation of the puff scattering values ​​of 1 to 9 heated cigarette samples with different atomizer contents in the embodiments of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0044] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0045] 1. Light projection method

[0046] As a non-contact measurement method, laser measurement of aerosols mainly uses the measurement of light intensity to invert the final result. In the light transmission method, when the laser passes through the aerosol particle group, the light beam is scattered, refracted and absorbed by the aerosol. At this time, when the light beam passes through the measured aerosol, the incident light intensity will be significantly attenuated. The attenuation effect of light is relatively weak at low concentrations. As the particle concentration increases, the attenuation effect of light intensity will increase. Therefore, the intensity of light transmitted at different aerosol concentrations will be different.

[0047] Lambert-Beer's law states that the amount of light absorbed by a substance in a completely transparent solvent is proportional to the concentration of the substance and the path length of the light through the solution, so the concentration of the substance can be calculated by this theorem. The formula for Lambert-Beer's law is as follows:

[0048]

[0049] Where A is absorbance; I0 is the intensity of incident light; I is the intensity of transmitted light; T is transmittance; K is the coefficient, which can be the absorption coefficient or molar absorption coefficient; l is the thickness of the absorbing medium; and c is the concentration of the absorbing substance.

[0050] The use of Beer-Lambert's law has certain limitations. It requires that the incident light is parallel monochromatic light and irradiated vertically, the absorbing material is a uniform non-scattering system, there is no interaction between absorbing particles, the interaction between radiation and matter is limited to the light absorption process, and no fluorescence and photochemical phenomena occur. According to the Beer-Lambert law, when the thickness of the absorbing medium remains unchanged, A and c should be proportional; but in actual measurements, the standard curve often deviates from the Beer-Lambert law, sometimes bending toward the concentration axis (negative deviation) and sometimes bending toward the absorbance axis (positive deviation). There are many reasons for the deviation. The main reason is that the actual situation during the measurement does not fully meet the prerequisites for the Beer-Lambert law to be established, including physical factors and chemical factors. The physical factors include deviation caused by non-monochromatic light, deviation caused by non-parallel incident light, deviation caused by medium inhomogeneity, etc. The chemical factors include deviation caused by excessive solution concentration and deviation caused by chemical reactions (such as hydrolysis and dissociation).

[0051] Assuming that the aerosol absorption coefficient is a constant, that is, the aerosol composition is uniform, there is no interaction between aerosol particles, and there is no chemical reaction between aerosol particles, the concentration of aerosol can be measured by parallel monochromatic light. From the Lambert-Beer law, we know that:

[0052]

[0053] By building a physical system, the thickness l of the aerosol absorption medium and the light transmittance T can be measured. The aerosol concentration value can be obtained by simply obtaining the aerosol light absorption K.

[0054] In the actual test process, the aerosol composition of heated cigarettes and electronic cigarettes is relatively complex, and the aerosol state is unstable, which causes the aerosol light absorption to gradually change. However, due to the fast response speed of the photoelectric device, the real-time aerosol light transmittance T can be obtained. If it is assumed that the aerosol changes only lead to changes in the aerosol concentration without changing the proportion of the various components of the aerosol, the Lambert-Beer law can be used to measure the aerosol concentration. There are many theoretical studies on aerosol light absorption. Generally speaking, the absorption coefficient of polydisperse aerosol is related to factors such as the particle size distribution of the aerosol, the particle size of the aerosol, and the density of the aerosol particles, as follows:

[0055]

[0056] Where: Q ext is the absorption coefficient of a single particle; dp is the diameter of the particle; n(d p ) is the particle size distribution function of polydisperse aerosol.

[0057] 2. Light scattering method

[0058] When a beam of light wave passes through a substance, it interacts with the microscopic structure or particles in the substance, causing the direction and intensity of the light wave to change, resulting in scattering, which usually includes Mie scattering and Rayleigh scattering.

[0059] Mie scattering is applicable to the case where the particle size is comparable to the wavelength of light, that is, the ratio of particle diameter to wavelength is between 0.1 and 10, including many tiny particles, such as fog, cloud droplets, particles in the atmosphere, etc. In this case, the size of the particle is no longer considered to be much smaller than the wavelength of light, so it is necessary to consider the multiple scattering of light on the particle surface. The characteristic of Mie scattering is that it presents a complex scattering pattern at different scattering angles and wavelengths, including multiple scattering peaks and valleys.

[0060] Rayleigh scattering is applicable to the case where the particle size is much smaller than the wavelength of light, that is, the ratio of particle diameter to wavelength of light is very small, including gas molecules in the atmosphere, etc. The intensity of Rayleigh scattering is inversely proportional to the fourth power of the wavelength of the incident light, so for short-wavelength light (such as ultraviolet light), the effect of Rayleigh scattering is more significant.

[0061] In general, Mie scattering and Rayleigh scattering are two theories that describe the interaction between light and particles under different size ranges and conditions. The choice of which theory to use depends on the particle size and the characteristics of the light wave. In practical applications, when the particle size is comparable to the wavelength of light, the complexity of Mie scattering needs to be considered; when the particles are very small, much smaller than the wavelength of light, Rayleigh scattering can be used for a simplified description. However, both Mie scattering and Rayleigh scattering have variables. It is rather cumbersome to infer the aerosol absorption coefficient from a theoretical point of view, and due to the limitations of aerosol particle size distribution testing technology, the theoretically derived results are quite different from the actual results. Therefore, this application chooses to use actual experimental measurements.

[0062] The measurement of transmission and scattering can be achieved by using commercially available products in this field. The light source emits light through the test cavity, and the detectors for detecting the transmitted light and scattered light are located at different angles for detection, and data can be obtained. Generally speaking, the detector for detecting the transmitted light is located on the extension line of the light path of the light source, and the detector for detecting the scattered light is perpendicular to the light path of the light source. The test cavity is a transparent container, which is used to deliver and extract the aerosol.

[0063] The device for generating aerosol can also be realized by using the existing commercially available products in the art. After the cigarette is inserted into the heating device, the filter rod end of the cigarette is clamped by the cigarette clamp and simulated suction is performed, and the smoke sucked out is introduced into the measuring chamber for measurement.

[0064] By combining optical testing instruments with cigarette simulation smoking instruments, signals such as transmittance and scattering values ​​can be obtained.

[0065] Based on this, the applicant conducted the following experiments:

[0066] 3. Transmittance and scattering value experiment content

[0067] 3.1 Test materials

[0068] The samples of heated cigarettes and their matching smoking utensils produced by Hubei China Tobacco, and the samples of electromagnetically heated cigarettes and their matching smoking utensils produced by Japan were selected, as shown in Table 3.1:

[0069] Table 3.1 Information on smoking accessories for heated cigarettes

[0070] Smoking equipment brand Preheating Presses Preheating pressing time (s) Warm-up waiting time (s) Heating method MOK 1 3 15 Needle heating IQOS 1 2 20 Electromagnetic Heating

[0071] 3.2 Experimental methods

[0072] Two unopened heated cigarette samples were placed in an environment that meets the test atmospheric environment requirements of GB / T 16447-2004 "Atmospheric environment for conditioning and testing of tobacco and tobacco products", that is, the temperature is (22±2)℃, the humidity is (60±5)%RH, and the atmospheric pressure is 86kPa~106kPa, and balanced for 48 hours. Ten cigarettes of each heated cigarette sample were measured.

[0073] During detection, the incident light wavelength λ is 532nm.

[0074] 3.3 Smoke volume data measurement results

[0075] Since the data of the first and second puffs of heated cigarettes are unstable, the indicator light of the cigarette device goes out from the seventh puff and no longer heats up. Therefore, the third to sixth puffs of heated cigarettes are studied. The standard deviation of transmittance and scattering value of Hubei China Tobacco heated cigarette sample MOK and IOOS electromagnetic heated cigarette sample produced in Japan are measured by smoke measurement processing software. Figure 1-4 shown.

[0076] from Figure 1-4 It can be seen that the standard deviation of transmittance of Hubei and IQOS heated cigarettes is the smallest in the fourth puff, and the following puffs tend to be stable; since the scattering value has a small impact, it is concluded that the fourth puff is taken as the research object to analyze the measurement data. The measurement data of the fourth puff of Hubei and IQOS heated cigarette samples are shown in Tables 3.2 and 3.3.

[0077] Table 3.2 Hubei heated cigarette data processing results

[0078] Suction port sequence Average transmittance Transmittance standard deviation Scattering value average Scattering value standard deviation No. 1 0.154879 0.076278 0.002179 0.000525 No. 2 0.041194 0.032633 0.00242 0.000514 No. 3 0.025081 0.016806 0.002318 0.001168 No. 4 0.023199 0.018895 0.002388 0.00105 No. 5 0.019444 0.013143 0.002541 0.001348 No. 6 0.029416 0.019259 0.002285 0.000738 No.7 0.046251 0.02816 0.002299 0.00072 No. 8 0.069746 0.041283 0.002291 0.000538 No. 9 0.099117 0.04491 0.002766 0.001322 No. 10 0.133602 0.042557 0.002615 0.000914 No. 11 0.821524 0.036201 0.002285 0.000575

[0079] Table 3.3 IQOS heated cigarette data processing results

[0080] Suction port sequence Average transmittance Transmittance standard deviation Scattering value average Scattering value standard deviation No. 1 0.13847 0.065426 0.001484 0.00054 No. 2 0.063128 0.03204 0.001588 0.000775 No. 3 0.061228 0.023848 0.001577 0.000611 No. 4 0.079886 0.026312 0.00189 0.000612 No. 5 0.084671 0.033393 0.001766 0.000483 No. 6 0.102509 0.035033 0.001626 0.000536 No.7 0.133401 0.04354 0.00158 0.00062 No. 8 0.17374 0.043997 0.001555 0.000394 No. 9 0.196645 0.047392 0.001864 0.000557 No. 10 0.236211 0.05369 0.001728 0.000558 No. 11 0.291676 0.067237 0.001654 0.000561 No. 12 0.366464 0.06611 0.001675 0.000695 No. 13 0.877016 0.039749 0.001789 0.000505

[0081] 4. Test of samples with different atomizer contents

[0082] 4.1 Test materials

[0083] Hubei China Tobacco selected samples of heated cigarettes with different smoke volumes, with a total of 7 gradients, 36 heated cigarettes for each gradient, rolled from thick slurry sheets with different atomizer contents. Detailed information on heated cigarettes and matching smoking utensils is shown in Table 4.1 and Table 4.2.

[0084] Table 4.1 Heated cigarette sample information

[0085]

[0086] Table 4.2 Information on smoking accessories for heated cigarettes

[0087] Smoking equipment brand Preheating Presses Preheating pressing time (s) Warm-up waiting time (s) Heating method MOK 1 3 15 Needle heating

[0088] 4.2 Experimental methods

[0089] The 7 unopened heated cigarette samples were placed in an environment that meets the test atmospheric environment requirements of GB / T 16447-2004 "Atmospheric environment for conditioning and testing of tobacco and tobacco products", that is, the temperature is (22±2)℃, the humidity is (60±5)%RH, and the atmospheric pressure is 86kPa~106kPa, and balanced for 48 hours. They were randomly divided into three groups, namely, the transmittance scattering value test group of 10 cigarettes and the cigarette smoke chemical composition test group of 3 cigarettes, respectively, for smoke volume test and cigarette smoke chemical composition test.

[0090] 4.3 Data measurement results

[0091] The transmittance and scattering values ​​of heated cigarette samples with different atomizer contents were measured using smoke measurement software and are shown in Tables 4.3 and 4.4.

[0092] Table 4.3 Transmittance measurement results of heated cigarettes with different atomizer addition amounts

[0093]

[0094]

[0095] Table 4.4 Scattering value measurement results of heated cigarettes with different atomizer addition amounts

[0096]

[0097] The change rate graph for each bite is shown in Figure 5-6 .

[0098] Depend on Figure 5-6It can be seen that the average transmittance decreases with the increase of the atomizer content, and the average scattering value increases with the increase of the atomizer content; when the atomizer content is high, that is, when the smoke concentration is high, the amount of smoke cannot be distinguished by the transmittance, but the amount of smoke can be clearly distinguished by the scattering value.

[0099] The changes in the average values ​​and relative standard deviations of the measurement results of 1 to 9 puffs of 7 types of heated cigarettes are as follows: Figure 7-10 shown.

[0100] Depend on Figure 7-10 It can be seen that with the increase of atomizer content, the average transmittance of heated cigarettes from 1 to 9 puffs decreased, while the average scattering value from 1 to 9 puffs increased. The relative standard deviation of transmittance from 1 to 9 puffs of samples Y5, Y6, and Y7 was large, while the relative standard deviation of transmittance of samples Y1, Y2, Y3, and Y4 was small, indicating that the puff-by-puff stability of samples Y5, Y6, and Y7 was poor; the relative standard deviation of scattering values ​​from 1 to 9 puffs of the seven samples was similar.

[0101] The measurement results of the chemical composition of smoke from heated cigarettes with 7 different atomizer addition amounts are shown in Table 4.5.

[0102] Table 4.5 Measurement results of chemical composition of heated cigarette smoke with different atomizer addition amounts

[0103]

[0104]

[0105] The following formula is used to calculate the Pearson correlation coefficient between the chemical composition of the seven samples and the per-mouth transmittance and per-mouth scattering. The calculation results are shown in Table 4.6. It can be seen that the per-mouth transmittance and scattering value measurement results of the samples are strongly correlated with the measurement results of 1,2-propylene glycol and propylene glycol; among them, the transmittance is positively correlated with the measurement results of 1,2-propylene glycol and propylene glycol, with the minimum correlation coefficient of -0.836 and the maximum correlation coefficient of -0.955; the scattering value is negatively correlated with the measurement results of 1,2-propylene glycol and propylene glycol, with the minimum correlation coefficient of 0.880 and the maximum correlation coefficient of 0.994.

[0106] Where: x i The test result of the sample Yi1,2-propylene glycol or glycerol, mg / tube; is the average value of the chemical composition test results of 7 samples, mg / piece; y i The test result of transmittance or scattering rate of a certain port of sample Yi; It is the average value of the transmittance or scattering test results of a certain port of 7 samples.

[0107] Table 4.6 Correlation analysis between chemical composition of heated cigarette smoke and scattering value measurement results with different atomizer addition amounts

[0108]

[0109] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for quantifying the concentration of atomizer in an aerosol, characterized in that: The following steps are involved: S1. Produce aerosol; S2, introducing the generated aerosol into the measurement chamber to measure the transmittance or scattering value; S3. Obtain the concentration of the aerosol atomizer according to any one of the measured transmittance or scattering values.

2. The method according to claim 1, characterized in that When the concentration of the aerosol atomizer is less than a preset value, the concentration of the aerosol atomizer is determined by either the transmittance or the scattering value; When the concentration of the aerosol atomizer is greater than a preset value, the concentration of the aerosol atomizer is determined by the scattering value.

3. The method according to any one of claims 1 to 2, characterized in that: After the transmittance or scattering value is obtained, it is compared with a predetermined calibration table to obtain the concentration of the aerosol in the aerosol.

4. The method according to claim 1, characterized in that A single-frequency parallel incident light beam with an intensity of I0 and a wavelength of λ passes through the measurement cavity, and the transmitted light intensity I or the scattered light intensity I is measured. s , The transmittance is calculated based on the transmittance definition T = I / I0; According to the scattered light intensity I s The ratio of the incident light intensity I0 to s / I0 calculates the scattering value.

5. The method according to claim 4, characterized in that The incident light wavelength λ is 1 mm to 10 nm.

6. The method according to claim 5, characterized in that The incident light wavelength λ is 400nm~760nm.

7. The method according to claim 6, characterized in that The incident light wavelength λ is 532±5nm.

8. The method according to claim 1, characterized in that After the measuring chamber is evacuated, the generated aerosol is introduced for measurement, and the chamber is evacuated again after the measurement is completed; The aerosol is introduced after vacuuming and discharged after measurement as one mouthful, and the transmitted light intensity I and scattered light intensity I of each mouthful of the aerosol-generated product are measured. s .

9. The method according to claim 8, characterized in that The number of mouth-by-mouth measurements ranges from 7 to 15, and the measurement data from mouths 3 to 6 are used for calculation.

10. The method according to claim 1, characterized in that After the aerosol is introduced into the measurement chamber, the average value from the 4th to the 5th second is read as the transmitted light intensity I and the scattered light intensity I s .

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