Method for determining mass proportion of tobacco components and application thereof

Abstract

The application provides a method for determining the mass proportion of tobacco components and application thereof, and the method comprises the following steps: balancing the mixed tobacco to be tested and its single components, then performing thermal gravimetric analysis, normalizing and first-order derivation on the obtained weight loss curve to obtain the weight loss rate curve of the mixed tobacco to be tested and its single components; selecting the weight loss rate Y of j same temperature points T on the weight loss rate curve of the mixed tobacco to be tested and its single components, establishing a j-element first-order equation group, and solving to obtain the mass proportion of each single component in the mixed tobacco to be tested. Compared with the prior art, the method provided by the application greatly reduces the complexity of the technical scheme, while ensuring the objectivity and accuracy of the determination of the mass proportion of tobacco components, and has important significance for evaluating the uniformity of tobacco component mixing, optimizing blending and mixing processing technology, and ensuring the consistency of cigarette product quality.

Description

Technical Field

[0001] This invention belongs to the field of cigarette production technology, specifically relating to a method for determining the mass percentage of tobacco components and its application. Background Technology

[0002] Cigarette tobacco is generally made up of leaf tobacco mixed with sheet tobacco, stem tobacco, expanded tobacco and other blended components. During the cigarette processing, the mass ratio of each blended component must meet the design value and be mixed evenly. This is one of the important prerequisites for ensuring that the taste and smoking experience of cigarette products are consistent. Therefore, the determination of the mass ratio of tobacco components is particularly important for cigarette production.

[0003] Currently, methods for determining the mass percentage of tobacco components mainly include manual sorting, chemical analysis, spectroscopic methods (near-infrared, hyperspectral, terahertz, etc.), and machine vision. Manual sorting is characterized by strong subjectivity, relatively poor accuracy, and relatively low efficiency. Chemical analysis methods are characterized by small sample sizes, complex processes, low efficiency, and unverifiable accuracy. Spectroscopic techniques such as near-infrared, hyperspectral, and terahertz are used to determine the proportion of tobacco components, but these methods are characterized by high equipment costs, complex modeling, and unverifiable accuracy. Machine vision methods have relatively simple equipment and controllable costs, but they are characterized by complex algorithms and certain requirements regarding the shape and size of tobacco components.

[0004] In summary, developing a rapid, simple, and accurate method for detecting the mass ratio of tobacco components is urgently needed. However, due to significant differences in the content of volatile components, hemicellulose, cellulose, lignin, etc., among tobacco components such as sheet tobacco, stem tobacco, expanded tobacco, and leaf tobacco, the raw material sources and processing methods vary considerably, making it difficult for existing methods to address these issues. Therefore, providing a method that can efficiently and accurately analyze the mass ratio of tobacco components is of great significance for evaluating the uniformity of tobacco component mixing, optimizing blending and processing techniques, and ensuring the consistency of cigarette product quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method for determining the mass percentage of tobacco components and its application. Compared with existing methods, the method provided by the present invention significantly reduces the complexity of the technical solution while ensuring the objectivity and accuracy of determining the mass percentage of tobacco components. This is of great significance for evaluating the uniformity of tobacco component mixing, optimizing blending and processing technology, and ensuring the consistency of cigarette product quality.

[0006] To achieve this objective, the present invention adopts the following technical solution: On one hand, the present invention provides a method for determining the mass percentage of tobacco components, the method comprising the following steps: The mixed tobacco shreds and their individual components were equilibrated, and then thermogravimetric analysis was performed. The resulting weight loss curves were normalized and the first derivative was obtained to get the weight loss rate curves of the mixed tobacco shreds and their individual components. On the weight loss rate curves of the mixed tobacco and its individual components, select j identical temperature points T and their weight loss rates Y (i.e., (T... i Y ij Establish a system of j linear equations and solve it to obtain the mass percentage of each component in the tested mixed tobacco. j represents the number of individual components in the mixed tobacco to be tested.

[0007] The above method utilizes thermogravimetric analysis to effectively collect the content differences of various components in tobacco raw materials. Combined with specific calculation methods, it can ensure the objectivity and accuracy of measuring the mass ratio of tobacco components. Compared with existing methods, the complexity of the technical solution is greatly reduced. It is of great significance for evaluating the uniformity of tobacco component mixing, optimizing blending and mixing technology, and ensuring the consistency of cigarette product quality.

[0008] Preferably, the single component includes any one or a combination of at least two of leaf filaments, swollen filaments, stem filaments, or sheet filaments.

[0009] Preferably, the equilibrium temperature is 20-25°C, the humidity is 55-65%, and the time is at least 48 hours.

[0010] The temperature can be 20℃, 21℃, 22℃, 23℃, 24℃ or 25℃, etc., and the humidity can be 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64% or 65%, etc., but is not limited to the values ​​listed above. Other unlisted values ​​within the above range are also applicable.

[0011] Preferably, in the thermogravimetric analysis, the initial temperature is 25-35℃, and the temperature is increased to 600-800℃ at a heating rate not exceeding 30℃ / min, and held for 3-7 min.

[0012] Preferably, in the thermogravimetric analysis, the carrier gas is nitrogen, and the carrier gas flow rate is 700-900 mL / min, such as 700 mL / min, 750 mL / min, 800 mL / min, 850 mL / min or 900 mL / min, but not limited to the values ​​listed above. Other unlisted values ​​within the above range are also applicable.

[0013] Preferably, the number of identical temperature points T is consistent with the number of individual components in the mixed tobacco to be tested.

[0014] Preferably, the temperature range of the temperature point T is 150-360℃.

[0015] Preferably, the process of determining the mass percentage of each individual component in the tested mixed tobacco is as follows: List C(p,j) sets of j-variable linear equations and solve them to obtain the mass percentage of each component in C(p,j). The geometric median of the mass percentage of each component is the mass percentage of each component in the mixed tobacco to be tested. p is the number of temperature points collected within the temperature range not exceeding the temperature point T.

[0016] Preferably, the system of j linear equations is as follows: In the formula, Y mn Let be the weight loss rate of the nth single component at the mth temperature point. X 1 , X 2 … X m … X j The mass percentage of the single component. Y 1 , Y 2 … Y m … Y j The weight loss rate at the corresponding temperature point during the thermogravimetric analysis of the mixed tobacco shreds to be tested.

[0017] The aforementioned specific parameter constraints can effectively improve the accuracy of the method.

[0018] On the other hand, the present invention also provides the application of the method for determining the mass ratio of tobacco components as described above in cigarette production.

[0019] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a method for determining the mass percentage of tobacco components. By using thermogravimetric analysis, the method can effectively collect the content differences of various components in tobacco raw materials. Combined with a specific calculation method, it can ensure the objectivity and accuracy of determining the mass percentage of tobacco components. Compared with existing methods, the complexity of the technical solution is greatly reduced. This method is of great significance for evaluating the uniformity of tobacco component mixing, optimizing blending and mixing technology, and ensuring the consistency of cigarette product quality. Attached Figure Description

[0020] Figure 1 These are the weight loss rate curves of the thin sheet tobacco, stem tobacco, leaf tobacco, and mixed tobacco in Example 1. Detailed Implementation

[0021] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0022] Example 1: Taking the determination of the mass percentage of blended tobacco shreds of a certain brand of cigarettes from Guangdong China Tobacco Industry Co., Ltd. as an example, it is known that the blended tobacco shreds contain three components: sheet shreds, stem shreds, and leaf shreds, with mass fractions of 20%, 20%, and 60%, respectively. The specific implementation steps are as follows.

[0023] (1) Prepare the instrument: online analyzer for heat treatment of multiple samples of tobacco. Set the instrument parameters and experimental conditions. For example, the temperature program is to heat from 30℃ to 700℃ at 5℃ / min and hold for 5min. The carrier gas type and flow rate of the online analyzer for heat treatment of multiple samples of tobacco are set to nitrogen and 800 mL / min, respectively. (2) Sample preparation: Take the finished sheet tobacco, finished stem tobacco and finished leaf tobacco produced by the cigarette making line, as well as the mixed tobacco after blending, and place the sample in a constant temperature and humidity chamber at 22℃ and 60% for 48 hours for equilibration. (3) Collect the weight loss curves of the above-mentioned objects to be tested: Collect the weight loss curves of the above-mentioned objects to be tested at the temperature program described in (1) using a thermogravimetric analyzer; (4) Plot the normalized weight loss curve and weight loss rate curve of the test object: Calculate the normalized weight loss curve based on the obtained weight loss curve of the test object, and further perform first-order derivative operation on the normalized weight loss curve to obtain the weight loss rate curve of the test object. The weight loss rate curves of sheet tobacco, stem tobacco, leaf tobacco and mixed tobacco are as follows: Figure 1 As shown; (5) Taking any three temperature points of 182℃, 215℃ and 324℃ as examples, in Figure 1 The weight loss rates of sheet tobacco, stem tobacco, leaf tobacco, and blended tobacco were read from the weight loss rate curves at three temperature points: 182℃, 215℃, and 324℃. Specific data are as follows: Figure 1 As indicated by the labels, 182℃, 215℃ and 324℃ correspond to (1), (2) and (3) in the figure.

[0024] (6) Assume that the mass percentages of filamentous filaments, stem filaments, and leaf filaments are respectively X 薄片丝 X 梗丝 X 叶丝 The system of three linear equations in three variables is as follows: -0.00103*X 薄片丝 +(-0.00136)* X 梗丝 +(-0.00175)* X 叶丝=-0.00153 -0.00126*X 薄片丝 +(-0.00187)* X 梗丝 +(-0.00256)* X 叶丝 =-0.00216 -0.00386*X 薄片丝 +(-0.00204)* X 梗丝 +(-0.00254)* X 叶丝 =-0.00270 (7) Solving the above system of three linear equations, we can obtain X 薄片丝 =0.1998, X 梗丝 =0.2045, X 叶丝 =0.5965, therefore, we obtain a set of solutions for the mass percentages of sheet tobacco, stem tobacco, and leaf tobacco in the mixed tobacco shreds: 19.98%, 20.45%, and 59.65%, respectively.

[0025] (8) In the temperature range of 150℃-360℃, a set of three linear equations in C(94,3) variables was set up to obtain the mass proportion of the single components in C(94,3) (i.e. 134044). The median values ​​were calculated to be 19.15%, 21.16%, and 59.09%, respectively. The mass proportions of the filaments, stems, and leaves were 19.15%, 21.16%, and 59.09%, respectively. The accuracy rates of the mass proportion determination were 95.75%, 94.20%, and 98.48%, respectively.

[0026] The data above shows that the method provided by this invention can accurately determine the mass percentage of each component in tobacco, greatly reducing the complexity of the technical solution.

[0027] The applicant declares that this invention illustrates the method for determining the mass ratio of tobacco components and its application through the above embodiments, but this invention is not limited to the above embodiments, that is, it does not mean that this invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials in the product of this invention, addition of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of this invention.

[0028] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0029] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A method for determining the mass percentage of tobacco components, characterized in that, The method for determining the mass percentage of tobacco components includes the following steps: The mixed tobacco shreds and their individual components were equilibrated, and then thermogravimetric analysis was performed. The resulting weight loss curves were normalized and the first derivative was obtained to get the weight loss rate curves of the mixed tobacco shreds and their individual components. On the weight loss rate curves of the mixed tobacco and its individual components, select j weight loss rates Y at the same temperature points T, establish a system of j linear equations, and solve them to obtain the mass percentage of each individual component in the mixed tobacco. j represents the number of individual components in the mixed tobacco to be tested.

2. The method for determining the mass percentage of tobacco components according to claim 1, characterized in that, The single component includes any one or a combination of at least two of leaf filaments, swollen filaments, stem filaments, or thin sheet filaments.

3. The method for determining the mass percentage of tobacco components according to claim 1 or 2, characterized in that, The equilibrium temperature is 20-25°C, the humidity is 55-65%, and the time is at least 48 hours.

4. The method for determining the mass percentage of tobacco components according to any one of claims 1-3, characterized in that, In the thermogravimetric analysis, the initial temperature is 25-35℃, and the temperature is increased to 600-800℃ at a heating rate not exceeding 30℃ / min, and held for 3-7 min.

5. The method for determining the mass percentage of tobacco components according to any one of claims 1-4, characterized in that, In the thermogravimetric analysis, nitrogen was used as the carrier gas, and the carrier gas flow rate was 700-900 mL / min.

6. The method for determining the mass percentage of tobacco components according to any one of claims 1-5, characterized in that, The number j of the same temperature points T is consistent with the number of individual components in the mixed tobacco to be tested.

7. The method for determining the mass percentage of tobacco components according to any one of claims 1-6, characterized in that, The temperature range of the temperature point T is 150-360℃.

8. The method for determining the mass percentage of tobacco components according to any one of claims 1-7, characterized in that, The process of determining the mass percentage of each individual component in the tested mixed tobacco is as follows: List C(p,j) sets of j-variable linear equations and solve them to obtain the mass percentage of each component in C(p,j). The geometric median of the mass percentage of each component is the mass percentage of each component in the mixed tobacco to be tested. p is the number of temperature points collected within the temperature range not exceeding the temperature point T.

9. The method for determining the mass percentage of tobacco components according to any one of claims 1-8, characterized in that, The system of j linear equations is as follows: In the formula, Y mn Let be the weight loss rate of the nth single component at the mth temperature point. X 1 , X 2 … X m … X j The mass percentage of the single component. Y 1 , Y 2 … Y m … Y j The rate of weight loss at the corresponding temperature point during the thermogravimetric analysis of the mixed tobacco to be tested.

10. The application of a method for determining the mass percentage of tobacco components according to any one of claims 1-9 in cigarette production.

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