A method for evaluating the quality of cigarette cut tobacco

Abstract

The present invention discloses a method for evaluating the quality of cigarette cut tobacco, belonging to the technical field of new tobacco quality detection; after heating the heated cigarette cut tobacco, the key chemical components and the content of volatile aroma substances in the cut tobacco are detected, and the release rates of the key substances and volatile aroma substances in the heated cut tobacco at each moment are calculated; and when calculating the maximum moment t of the release rate of the volatile aroma substances according to the release rate of the volatile aroma substances, the release rate ratio DM of the key substances in the cigarette cut tobacco is calculated, and the quality of the cigarette cut tobacco is evaluated according to the release rate ratio DM; the larger the value of the release rate ratio DM, the better the balance of the release of the volatile aroma substances, moisture, nicotine and glycerol in the cut tobacco, the more fully the aroma substances in the cut tobacco are released, and the better the quality of the heated cigarette cut tobacco, thereby providing an objective basis for the quality evaluation of the heated cigarette cut tobacco.

Description

Technical Field

[0001] The present invention discloses a method for evaluating the quality of cigarette cut tobacco, belonging to the technical field of tobacco quality detection. Background Art

[0002] The quality of cut tobacco is an important indicator affecting the quality of cigarettes. It not only affects the appearance quality of cigarettes, but also directly affects the satisfaction of consumers during smoking. There are many influencing factors, which are significantly correlated with quality indicators such as moisture, structure, filling value, stem ratio, expanded cut tobacco ratio, and reconstituted tobacco ratio. Therefore, it is necessary to make timely adjustments during the production process. However, due to the large number of equipment and complex process routes in the cigarette production line, when evaluating the quality of cut tobacco, it can only be judged by the satisfaction of process parameters in each process of the production line, lacking a fast quality evaluation method.

[0003] Currently, the tobacco industry generally uses a data acquisition system to collect the parameter operation conditions of each process. After collection, the parameters are calculated for average value, standard deviation, deviation, range, and CPK to generate a report, and the quality of batch cut tobacco is judged through the upper and lower limit standards of these data. However, these data only stay on the surface of the cut tobacco quality and cannot reflect the quality of the cut tobacco's internal quality, such as the filling ability of the cut tobacco, the tensile resistance of the cut tobacco, the breakage resistance of the cut tobacco, and the sensory smoking quality of the finished cigarette. This has an adverse impact on quality control and consumer adhesion, increasing quality costs and production costs.

[0004] Some domestic tobacco processing enterprises use the data acquisition system to set and judge the upper and lower limits of the average value, standard deviation, deviation, range, and CPK parameters of the collected parameters. If it exceeds the upper and lower limit settings, it is judged as unqualified, and if it is within the set value, it is judged as qualified. The closer to the central value, the higher the quality grade. Although this evaluation mode can view and judge the subtle parameters, it cannot comprehensively evaluate the quality of cut tobacco. Summary of the Invention

[0005] The present invention provides a method for evaluating the quality of cigarette cut tobacco, aiming to provide an objective basis for evaluating the quality of cigarette cut tobacco under a heating state.

[0006] To solve the above problems, the present invention adopts the following technical solution: A method for evaluating the quality of cigarette cut tobacco, the method comprising the following steps:

[0007] Turn on the macroscale tobacco high-temperature thermal conversion thermogravimetric analyzer, and use nitrogen as the protective gas for the lifting furnace of the macroscale tobacco high-temperature thermal conversion thermogravimetric analyzer; preheat the lifting furnace to the set test temperature;

[0008] Collect the cut tobacco of the set weight M1 of cigarettes and put it into a crucible. Hang the crucible containing the cut tobacco on the thermogravimetric balance in the lifting furnace; collect the weight of the heated cut tobacco in the crucible in real time through the thermogravimetric balance.

[0009] Start timing from when the crucible containing the cut tobacco is hung on the thermogravimetric balance in the lifting furnace until the heating test ends at time T1. During this period, take out part of the cut tobacco of cigarettes from the crucible at every set time interval T2. Seal the taken out heated cut tobacco in a bag and detect the content of key substances and volatile aroma substances in the cut tobacco of cigarettes.

[0010] Calculate the release rate of key substances and volatile aroma substances in the heated cut tobacco at each moment.

[0011] Calculate the release rate ratio DM of the key substances in the cut tobacco of cigarettes at the moment t when the release rate of the volatile aroma substances is the largest. Evaluate the quality of the cut tobacco of cigarettes according to the release rate ratio DM.

[0012] Further, the protective gas flow rate input into the lifting furnace is 200 ml / min; the test temperature of the lifting furnace is set at 200 °C.

[0013] Further, the preset time T1 for the lifting furnace to heat the cut tobacco of cigarettes is at most 800 s; the interval set time T2 for taking out part of the cut tobacco of cigarettes from the crucible is 50 s.

[0014] Further, the key substances of the heated cut tobacco include moisture, glycerol and nicotine.

[0015] Further, measure the moisture content in the cut tobacco according to YC / T 345-2010, measure the glycerol content in the cut tobacco according to YC / T 243-2008, and measure the nicotine content in the cut tobacco according to YC / T 246-2008.

[0016] Further, the calculation method for the content of volatile aroma substances in the heated cut tobacco is as follows:

[0017] MQ = MZ - (MW + MG + MN

[0018] In the formula, MQ represents the content of volatile aroma substances in the taken out part of the cut tobacco of cigarettes; MZ represents the weight of the taken out part of the cut tobacco of cigarettes; MW represents the moisture content in the taken out part of the cut tobacco of cigarettes; MG represents the glycerol content in the taken out part of the cut tobacco of cigarettes; MN represents the nicotine content in the taken out part of the cut tobacco of cigarettes.

[0019] Further, the method for calculating the release rate ratio DM of the key substances in the cut tobacco of cigarettes at the moment t when the release rate of the volatile aroma substances is the largest includes:

[0020] [[ID=**********]]

[0021] In the formula, VQ It is expressed as the maximum release rate of volatile aroma substances; V W It is expressed as the moisture release rate at time t when the release rate of volatile aroma substances is the maximum; V G It is expressed as the glycerol release rate at time t when the release rate of volatile aroma substances is the maximum; V N It is expressed as the nicotine release rate at time t when the release rate of volatile aroma substances is the maximum.

[0022] Furthermore, the method for evaluating the quality of cigarette cut tobacco according to the release rate ratio DM includes:

[0023] The higher the release rate ratio DM value, the better the quality of the heated cigarette cut tobacco is evaluated; the quality of the cigarette cut tobacco is classified according to the release rate ratio DM value.

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, after heating the cigarette cut tobacco, the key components and the content of volatile aroma substances in the heated cut tobacco are detected, and the release rates of the key substances and volatile aroma substances in the heated cut tobacco at each moment are calculated; and according to the release rate of the volatile aroma substances, the release rate ratio DM of the key substances in the cigarette cut tobacco at the moment t when the release rate of the volatile aroma substances is the maximum is calculated, and the quality of the cigarette cut tobacco is evaluated according to the release rate ratio DM; the larger the release rate ratio DM value, the better the balance between the volatile aroma substances and moisture, nicotine, and glycerol released by the cut tobacco, the more fully the aroma substances in the cut tobacco are released, and the better the quality of the heated cigarette cut tobacco, thereby providing an objective basis for the quality evaluation of the heated cigarette cut tobacco. Description of the Drawings

[0025] Figure 1 It is a flowchart of a method for evaluating the quality of cigarette cut tobacco provided by an embodiment of the present invention; Detailed Embodiments

[0026] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be used to limit the protection scope of the present invention.

[0027] As Figure 1 shown, an embodiment of the present invention provides a method for evaluating the quality of cigarette cut tobacco, and the method includes the following steps:

[0028] Turn on the macroscale tobacco high-temperature thermal conversion thermogravimetric analyzer. The lifting furnace of the macroscale tobacco high-temperature thermal conversion thermogravimetric analyzer uses nitrogen as the protective gas; preheat the lifting furnace to the set test temperature; input the protective gas flow rate of the lifting furnace as 200 ml / min; set the test temperature of the lifting furnace as 200 °C;

[0029] In this embodiment, a macro-thermogravimetric analyzer is used to process samples of more than 1000 mg. Under such conditions, the mass and heat transfer can proceed normally in the cut tobacco, and the reaction state of the cut tobacco is closer to the actual state of the heated cigarette.

[0030] Collect cut tobacco of a set weight M1 of cigarettes and put it into a crucible. Hang the crucible containing the cut tobacco on the thermogravimetric balance in the lifting furnace; collect the weight of the heated cut tobacco in the crucible in real time through the thermogravimetric balance.

[0031] Start timing from when the crucible containing the cut tobacco is hung on the thermogravimetric balance in the lifting furnace until the heating test ends at time T1. During this period, take out some cut tobacco from the crucible at intervals of a set time T2. The preset time T1 for heating the cut tobacco in the lifting furnace is at most 800 s; the interval set time T2 for taking out some cut tobacco from the crucible is 50 s; put the taken out heated cut tobacco into a bag and seal it, and detect the content of key substances and volatile aroma substances in the cut tobacco of the cigarette; the key substances of the heated cut tobacco include moisture, glycerol, and nicotine.

[0032] Specifically, determine the moisture content in the cut tobacco according to YC / T 345-2010, determine the glycerol content in the cut tobacco according to YC / T 243-2008, and determine the nicotine content in the cut tobacco according to YC / T 246-2008.

[0033] Calculate the release rate of key substances and volatile aroma substances in the heated cut tobacco at each moment; the calculation method for the content of volatile aroma substances in the heated cut tobacco is:

[0034] MQ = MZ - (MW + MG + MN

[0035] In the formula, MQ represents the content of volatile aroma substances in the taken out part of the cut tobacco of the cigarette; MZ represents the weight of the taken out part of the cut tobacco of the cigarette; MW represents the moisture content in the taken out part of the cut tobacco of the cigarette; MG represents the glycerol content in the taken out part of the cut tobacco of the cigarette; MN represents the nicotine content in the taken out part of the cut tobacco of the cigarette.

[0036] Calculate the release rate ratio DM of the key substances in the cut tobacco of the cigarette at the moment t when the release rate of the volatile aroma substances is the maximum, evaluate the quality of the cut tobacco of the cigarette according to the release rate ratio DM, and the method for evaluating the quality of the cut tobacco of the cigarette according to the release rate ratio DM includes:

[0037] The higher the value of the release rate ratio DM, the better the quality of the cut tobacco of the heated cigarette is evaluated; classify the quality of the cut tobacco of the cigarette according to the value of the release rate ratio DM.

[0038] Specifically, the method for calculating the release rate ratio DM of the key substances in the cut tobacco of the cigarette at the moment t when the release rate of the volatile aroma substances is the maximum includes:

[0039]

[0040] In the formula, V Q represents the maximum release rate of volatile aroma substances; V W represents the moisture release rate at time t when the release rate of volatile aroma substances is the maximum; V G represents the glycerol release rate at time t when the release rate of volatile aroma substances is the maximum; V N represents the nicotine release rate at time t when the release rate of volatile aroma substances is the maximum.

[0041] Experimental group 1

[0042] Turn on the thermogravimetric analyzer for high-temperature thermal conversion of macro-type tobacco, use nitrogen as the protective gas, and set the flow rate to 200 ml / min; set the test temperature to 200 °C. After the temperature stabilizes, weigh 1 g of cigarette tobacco cut A and put it into the crucible. Hang the crucible containing the tobacco cut into the thermogravimetric balance. Start timing after the lifting furnace is automatically sealed; set the time of the lifting furnace to 800 s, take a sample every 50 s. After reaching the set time, take out the tobacco cut;

[0043] Put the samples in bags and seal them to detect the key components of the heated tobacco cut. The tobacco cut samples with different drying times are all samples starting over; the thermogravimetric balance weighs the weight of the heated tobacco cut, key components, and the content of volatile aroma substances, as shown in Table 1:

[0044] Table 1 Key components and content of volatile aroma substances in cigarette tobacco cut A

[0045]

[0046] Normalize the initial values of the key components and the content of volatile aroma substances in cigarette tobacco cut A to obtain the remaining ratios of each substance in cigarette tobacco cut A at time t, as shown in Table 2:

[0047] Table 2 Remaining ratios of key components and content of volatile aroma substances in cigarette tobacco cut A

[0048]

[0049]

[0050] It can be seen from Table 2 that the maximum release rate of volatile aroma substances in cigarette tobacco cut A is 0.0319 (% / s), the time point t is 300 s. At this time, the moisture release rate is 0.1469 (% / s), the glycerol release rate is 0.1467 (% / s), and the nicotine release rate is 0.1952 (% / s);

[0051] The release rate ratio DM of the key components in cigarette tobacco cut A at time t is as follows:

[0052]

[0053] Experimental Group 2

[0054] Turn on the macro-scale tobacco high-temperature thermal conversion thermogravimetric analyzer, use nitrogen as the protective gas, and set the flow rate to 200 ml / min; set the test temperature to 200 °C. After the temperature stabilizes, weigh 1 g of cigarette tobacco B and put it into the crucible. Hang the crucible containing the tobacco into the thermogravimetric balance. Start timing after the lifting furnace is automatically sealed; set the lifting furnace time to 800 s, take a sample every 50 s, and take out the tobacco after reaching the set time;

[0055] Bag and seal to detect the key components of the heated tobacco. The tobacco samples with different drying times are all samples restarted; the thermogravimetric balance weighs the weight of the heated tobacco, key components, and the content of volatile aroma substances, as shown in Table 3:

[0056] Table 3 Key components and volatile aroma substance content in cigarette tobacco B

[0057]

[0058]

[0059] Normalize the initial values of the key components and volatile aroma substance content in cigarette tobacco B to obtain the remaining ratio of each substance in cigarette tobacco B at time t, as shown in Table 4:

[0060] Table 4 Remaining ratio of key components and volatile aroma substance content in cigarette tobacco B

[0061]

[0062] It can be seen from Table 4 that the maximum release rate of volatile aroma substances in cigarette tobacco B is 0.0329 (% / s), the time point t is 350 s, at this time the water release rate is 0.0822 (% / s), the glycerol release rate is 0.1471 (% / s), and the nicotine release rate is ********** 0.2110 (% / s).

[0063] The release rate ratio DM of the key components of cigarette tobacco B at time t is as follows:

[0064]

[0065] By comparing with Experimental Group 1, the release rate of the key components of cigarette tobacco B is higher than that of Experimental Group 1. Therefore, the release balance of the key components of cigarette tobacco B and the tobacco quality are better than those of cigarette tobacco A.

[0066] Experimental Group 3

[0067] Turn on the macro-scale tobacco high-temperature thermal conversion thermogravimetric analyzer, use nitrogen as the protective gas, and set the flow rate to 200 ml / min; set the test temperature to 200 °C. After the temperature stabilizes, weigh 1 g of cigarette tobacco C and put it into the crucible. Hang the crucible with the tobacco into the thermogravimetric balance. Start timing after the lifting furnace is automatically sealed; set the lifting furnace time to 800 s, take a sample every 50 s, and take out the tobacco after reaching the set time.

[0068] Bag and seal to detect the key components of the heated tobacco. The tobacco samples with different drying times are all samples restarted; the thermogravimetric balance weighs the weight of the heated tobacco, key components, and content of volatile aroma substances, as shown in Table 5:

[0069] Table 5 Key components and content of volatile aroma substances in cigarette tobacco C

[0070]

[0071]

[0072] Normalize the initial values of the key components and the content of volatile aroma substances in cigarette tobacco C to obtain the remaining ratios of each substance in cigarette tobacco C at time t, as shown in Table 6:

[0073] Table 6 Remaining ratios of key components and content of volatile aroma substances in cigarette tobacco C

[0074]

[0075] It can be seen from Table 6 that the maximum release rate of volatile aroma substances in cigarette tobacco C is 0.0155 (% / s), the time point t is 400 s, at this time the water release rate is 0.0925 (% / s), the glycerol release rate is 0.1371 (% / s), and the nicotine release rate is 0.2030 (% / s).

[0076] The release rate ratio DM of the key components of cigarette tobacco C at time t is as follows:

[0077]

[0078] By comparing Experiment Group 1 and Experiment Group 2, the release rates of the key components in cigarette tobacco C are lower than those in Experiment Group 1 and Experiment Group 2. Therefore, the release balance of the key components of cigarette tobacco C and the tobacco quality are lower than those of cigarette tobacco A and cigarette tobacco B.

[0079] In the embodiment of the present invention, after heating the heated cigarette tobacco, the key chemical components and the content of volatile aroma substances in the tobacco are detected, and the release rates of the key substances and volatile aroma substances in the heated tobacco at each moment are calculated; and when calculating the maximum moment t of the release rate of the volatile aroma substances according to the release rate of the volatile aroma substances, the release rate ratio DM of the key substances in the cigarette tobacco is calculated, and the quality of the cigarette tobacco is evaluated according to the release rate ratio DM; the larger the value of the release rate ratio DM, the better the balance of the release of the volatile aroma substances, moisture, nicotine, and glycerol in the tobacco, the more sufficient the release of the aroma substances in the tobacco, and the better the quality of the heated cigarette tobacco, thereby providing an objective basis for the quality evaluation of the heated cigarette tobacco.

[0080] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A method for evaluating the quality of cigarette cut tobacco, characterized in that, The method includes the following steps: Turn on the thermogravimetric analyzer for high-temperature thermal conversion of macro tobacco. The lifting furnace of the thermogravimetric analyzer for high-temperature thermal conversion of macro tobacco uses nitrogen as the protective gas; preheat the lifting furnace to the set test temperature. Collect cigarette tobacco shreds with a set weight M1 and put them into a crucible. Hang the crucible containing the tobacco shreds on the thermogravimetric balance in the lifting furnace; collect the weight of the heated tobacco shreds in the crucible in real time through the thermogravimetric balance. Start timing from when the crucible containing the tobacco shreds is hung on the thermogravimetric balance in the lifting furnace until the heating test ends at time T1. During this period, take out some cigarette tobacco shreds from the crucible at every interval of the set time T2. Seal the taken-out heated tobacco shreds in a bag and detect the contents of key substances and volatile aroma substances in the cigarette tobacco shreds. Calculate the release rates of key substances and volatile aroma substances in the heated tobacco shreds at each moment. Calculate the release rate ratio DM of the key substances in the cigarette tobacco shreds at the moment t when the release rate of the volatile aroma substances is the maximum. Evaluate the quality of the cigarette tobacco shreds according to the release rate ratio DM.

2. The method for evaluating the quality of cigarette cut tobacco according to claim 1, wherein The input protective gas flow rate of the lifting furnace is 200 ml / min; the set test temperature of the lifting furnace is 200 °C.

3. The method for evaluating the quality of cigarette cut tobacco according to claim 1, characterized in that The preset time T1 for the lifting furnace to heat the cigarette tobacco shreds is at most 800 s; the interval set time T2 for taking out some cigarette tobacco shreds from the crucible is 50 s.

4. The method for evaluating the quality of cigarette cut tobacco according to claim 1, characterized in that, The key substances in the heated tobacco shreds include moisture, glycerol, and nicotine.

5. The method for evaluating the quality of cigarette cut tobacco according to claim 4, wherein Determine the moisture content in the tobacco shreds according to YC / T 345-2010, determine the glycerol content in the tobacco shreds according to YC / T 243-2008, and determine the nicotine content in the tobacco shreds according to YC / T 246-2008.

6. The method for evaluating the quality of cigarette cut tobacco according to claim 5, wherein The calculation method for the content of volatile aroma substances in the heated tobacco shreds is as follows: MQ = MZ - (MW + MG + MN) In the formula, MQ represents the content of volatile aroma substances in the taken-out part of the cigarette tobacco shreds; MZ represents the weight of the taken-out part of the cigarette tobacco shreds; MW represents the moisture content in the taken-out part of the cigarette tobacco shreds; MG represents the glycerol content in the taken-out part of the cigarette tobacco shreds; MN represents the nicotine content in the taken-out part of the cigarette tobacco shreds.

7. The method for evaluating the quality of cigarette cut tobacco according to claim 6, wherein, The method for calculating the release rate ratio DM of the key substances in the cigarette tobacco shreds at the moment t when the release rate of the volatile aroma substances is the maximum includes: In the formula, V Q represents the maximum release rate of volatile aroma substances; V W represents the moisture release rate at time t when the release rate of volatile aroma substances is the maximum; V G represents the glycerol release rate at time t when the release rate of volatile aroma substances is the maximum; V N represents the nicotine release rate at time t when the release rate of volatile aroma substances is the maximum.

8. The method for evaluating the quality of cigarette cut tobacco according to claim 7, wherein, The method for evaluating the quality of the cigarette tobacco shreds according to the release rate ratio DM includes: The higher the value of the release rate ratio DM, the better the quality of the heated cigarette tobacco shreds is evaluated; classify the quality of the cigarette tobacco shreds according to the value of the release rate ratio DM.

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