Tobacco-flavored electronic cigarette tar and preparation method thereof

Abstract

The invention belongs to the technical field of electronic cigarettes, and particularly relates to tobacco-flavor electronic cigarette tar and a preparation method thereof. The tobacco-flavor electronic cigarette tar provided by the invention comprises the following components in percentage by mass: 75-95% of a solvent, less than or equal to 2% of a nicotine component, 1-15% of a tobacco extract and less than or equal to 10% of an additive, wherein the content of polysaccharide substances in the tobacco tar is controlled to be smaller than or equal to 0.0215%, the total content of monosaccharide and disaccharide is controlled to be smaller than or equal to 0.003%, and the content of inorganic metal elements is controlled to be smaller than or equal to 30 mg / kg. By controlling the content of carbohydrates and inorganic metal elements in the tobacco tar, compared with commercially available electronic cigarette tobacco tar, carbon deposition and smoke amount attenuation can be effectively reduced, and the problems that commercially available products are prone to charring, carbon deposition, taste attenuation and smoke amount attenuation, heating films (filaments) and heating bodies (cotton) are prone to being blocked, the resistance value fluctuation of the heating bodies is large and the like are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic cigarettes, and particularly relates to a tobacco-flavored electronic cigarette oil and a preparation method thereof. Background Art

[0002] Electronic cigarettes are electronic products that imitate cigarettes. They have almost the same appearance, smoke, taste and feel as cigarettes. The e-cigarette oil in the e-cigarette market is mainly tobacco flavored. Due to the restrictions on the use of e-liquid additives in relevant standards, e-liquid flavoring is a huge challenge in the field.

[0003] In the process of blending tobacco-flavored e-cigarette oil, one of the most important raw materials that affects the tobacco flavor is tobacco extract. At present, most of the tobacco extracts used for flavoring e-cigarette oil come from traditional cigarette tobacco extracts. Since the atomization temperatures of traditional cigarettes and e-cigarettes are very different, and their physical and chemical properties are essentially different, the use of macromolecules, high-boiling-point substances, and microscopic particles in the tobacco extracts of traditional cigarettes will cause the e-cigarette atomization core to easily deposit carbon, the resistance of the heating element to change greatly, the amount of smoke and taste to attenuate, the life of the ceramic core to be shortened, and the anti-dry burning protection to be triggered, which seriously affects the user experience.

[0004] With the increase in the market share of tobacco-flavored e-cigarette products and the continuous deepening of research and development, the atomization core, cigarette device structure and e-liquid matching technology for e-cigarettes are important core technologies that affect the quality of e-cigarettes. It is necessary to address the pain points and develop a tobacco-flavored e-cigarette e-cigarette liquid that is suitable for e-cigarettes and conforms to the atomization characteristics of e-cigarettes, with low carbon deposits, low taste attenuation, and low smoke volume attenuation. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned defects of tobacco-flavored electronic cigarette liquid in the prior art, thereby providing a tobacco-flavored electronic cigarette liquid and a preparation method thereof.

[0006] To this end, the present invention provides the following technical solutions:

[0007] The present invention provides a tobacco-flavored electronic cigarette oil, comprising the following components in percentage by mass: 75-95% of a solvent, ≤2% of a nicotine component, 1-15% of a tobacco extract, and ≤10% of an additive;

[0008] Wherein, the content of polysaccharides in the e-liquid is controlled to be ≤0.0215%, the total content of monosaccharides and disaccharides is ≤0.003%, and the content of inorganic metal elements is ≤30 mg / kg.

[0009] Optionally, the e-liquid contains pectin ≤0.0005%, hemicellulose ≤0.001%, starch ≤0.01%, and cellulose ≤0.01%.

[0010] Optionally, the fructose content in the e-liquid is ≤0.0005%, the glucose content is ≤0.0005%, the sucrose content is ≤0.001%, and the maltose content is ≤0.001%.

[0011] Optionally, the sodium content in the e-liquid is ≤0.5 mg / kg, the potassium content is ≤25 mg / kg, and the magnesium content is ≤1 mg / kg.

[0012] Optionally, the additive includes butyric acid and leaf alcohol. Based on the total mass of the tobacco-flavored electronic cigarette oil, the mass percentage of butyric acid is 0.5-2%, and the mass percentage of leaf alcohol is 0.1-0.5%.

[0013] Optionally, the solvent includes at least one of ethanol, propylene glycol, glycerol, and water;

[0014] and / or, the nicotine component comprises at least one of nicotine or a nicotine salt;

[0015] And / or, the selection and addition amount of the additives meet the requirements of national standard GB41700-2022.

[0016] Optionally, the content of glycerol is 20-80%, and the content of water is below 2%, so as to control the viscosity of the e-liquid to be below 300cp.

[0017] Optionally, in the tobacco extract, the content of polysaccharides is ≤2.15%, the content of monosaccharides and disaccharides is ≤0.25%, and the content of inorganic metal elements is ≤5.26%.

[0018] Optionally, in the tobacco extract, the pectin content is ≤0.05%, the hemicellulose content is ≤0.1%, and the total content of starch and cellulose is ≤1%;

[0019] and / or, fructose content ≤ 0.05%, glucose content ≤ 0.05%, sucrose content ≤ 0.05%, maltose content ≤ 0.1%;

[0020] And / or, the sodium content is ≤5%, the potassium content is ≤0.25%, and the magnesium content is ≤0.01%.

[0021] The present invention also provides a method for preparing the above-mentioned tobacco-flavored electronic cigarette oil, comprising the following steps:

[0022] Weigh each component in proportion and mix them to obtain the tobacco-flavored electronic cigarette oil.

[0023] In the present invention, in the tobacco flavored electronic cigarette oil formula, the content of the corresponding components in the final oil is mainly controlled by controlling the content of sugars and inorganic metal elements in the tobacco extract. Typically, the method of reducing sugar in tobacco extract is: extracting, separating, grouping, purifying, cleaning, and concentrating the tobacco extract by water extraction and alcohol precipitation of tobacco, tobacco alcohol extraction, tobacco distillation, tobacco cracking, tobacco dry distillation, membrane technology, etc.

[0024] The technical solution of the present invention has the following advantages:

[0025] The tobacco-flavored electronic cigarette oil provided by the present invention comprises the following components in percentage by mass: 75-95% solvent, ≤2% nicotine component, 1-15% tobacco extract, and ≤10% additive; wherein the content of polysaccharide in the oil is controlled to be ≤0.0215%, the total content of monosaccharide and disaccharide is ≤0.003%, and the content of inorganic metal elements is ≤30mg / kg. By controlling the content of sugar substances and inorganic metal elements in the oil, the present invention can effectively reduce carbon deposition and smoke attenuation compared with commercial electronic cigarette oil, and solves the problems of easy burning, easy carbon deposition, easy taste attenuation, easy smoke attenuation, easy clogging of heating film (silk), heating element (cotton), and large fluctuation of heating element resistance.

[0026] The tobacco-flavored electronic cigarette oil provided by the present invention can significantly reduce the surface tension of the oil by limiting the content of butyric acid and leaf alcohol. The surface tension is an important indicator of the ease of vaporization of a liquid. The reduction in surface tension proves that the oil is easier to vaporize and is less likely to accumulate carbon or become burnt.

[0027] The tobacco-flavored electronic cigarette liquid provided by the present invention achieves component regulation of the final liquid by controlling the components of the tobacco extract, breaking through the idea of ​​the prior art that mainly regulates from the aspects of solvents, functional additives, etc., and achieves better technical effects in reducing carbon deposits and smoke attenuation, etc.

[0028] The tobacco flavored electronic cigarette oil provided by the present invention controls the viscosity of the oil to be below 300 cp by limiting the contents of glycerol and water, thereby achieving regulation of the oil conduction rate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 1This is a photo of the ceramic atomizer core under a 20x optical microscope after 200 puffs of the e-liquid provided in Example 1 of the present invention;

[0031] Figure 2 This is a photo of the ceramic atomizer core under a 20x optical microscope after 200 puffs of the e-liquid provided in Example 2 of the present invention;

[0032] Figure 3 This is a photo of the ceramic atomizer core under a 20x optical microscope after 200 puffs of the e-liquid provided in Example 3 of the present invention;

[0033] Figure 4 This is a photo of the ceramic atomizer core of the present invention taken under a 20x optical microscope after 200 puffs of commercially available tobacco flavored e-liquid;

[0034] Figure 5 This is an image of the ceramic atomizer core after two-dimensional processing after 200 puffs of the e-liquid provided in Example 1 of the present invention;

[0035] Figure 6 This is an image of the ceramic atomizer core after two-dimensional processing after 200 puffs of the e-liquid provided in Example 2 of the present invention;

[0036] Figure 7 This is an image of the ceramic atomizer core after two-dimensional processing after 200 puffs of the e-liquid provided in Example 3 of the present invention;

[0037] Figure 8 This is an image of the ceramic atomizer core after two-dimensional processing of the present invention and commercially available tobacco-flavored e-liquid after 200 puffs. DETAILED DESCRIPTION

[0038] The following examples are provided for a better understanding of the present invention, but are not intended to limit the best mode of implementation, nor to limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention.

[0039] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in the field can be used. If no manufacturer is specified for the reagents or instruments used, they are all conventional reagent products that can be obtained commercially.

[0040] Example 1

[0041] This embodiment provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0042] Table 1

[0043]

[0044]

[0045] Weigh each component in proportion and mix them evenly to obtain the tobacco flavored electronic cigarette oil. The oil is clear in color and free of suspended matter, slightly soluble matter, and insoluble matter; the physical indicators of the electronic cigarette oil are: viscosity at 126.5cp, density 1.10g / cm 3 , oil conduction time 4.40s (the test method of oil conduction time is: add a certain amount of smoke oil into the culture dish, put the heating element ceramic surface into the smoke oil, start timing, the smoke oil will slowly climb up from the bottom, and when you see the smoke oil climb to the heating film section, stop timing, the time difference is the oil conduction time), refractive index 1.4468nD, surface tension 44.95mN / m; the chemical indicators of electronic cigarette oil are as follows.

[0046] Table 2

[0047] Substances and units content fructose% 0.00025 glucose% 0.00025 sucrose% 0.0005 maltose% 0.0005 Cellulose % 0.005 Hemicellulose% 0.0005 Pectin% 0.00025 starch% 0.005 Sodium mg / kg 0.025 Potassium mg / kg 0.00125 Magnesium mg / kg 0.0005

[0048] Example 2

[0049] This embodiment provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0050] Table 3

[0051]

[0052]

[0053] Weigh each component in proportion and mix them evenly to obtain the tobacco flavored electronic cigarette oil. The oil is clear in color and free of suspended matter, slightly soluble matter, and insoluble matter; the physical indicators of the electronic cigarette oil are: viscosity at 159.4cp, density 1.13g / cm 3 , oil conduction time 6.70s, refractive index 1.4520nD, surface tension 43.24mN / m; the chemical indicators of electronic cigarette oil are detailed in the table below.

[0054] Table 4

[0055] Substances and units content fructose% 0.0004 glucose% 0.0004 sucrose% 0.0009 maltose% 0.0009 Cellulose % 0.0091 Hemicellulose% 0.0009 Pectin% 0.0004 starch% 0.009 Sodium mg / kg 0.0448 Potassium mg / kg 0.0022 Magnesium mg / kg 0.0009

[0056] Example 3

[0057] This embodiment provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0058] Table 5

[0059]

[0060] Weigh each component in proportion and mix them evenly to obtain the tobacco flavored electronic cigarette oil. The oil is clear in color and free of suspended matter, slightly soluble matter, and insoluble matter; the physical indicators of the electronic cigarette oil are: viscosity at 189.5cp, density 1.14g / cm 3 , oil conduction time 8.40s, refractive index 1.4551nD, surface tension 42.16mN / m; the chemical indicators of electronic cigarette oil are: see the table below for details.

[0061] Table 6

[0062]

[0063]

[0064] Example 4

[0065] This embodiment provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0066] Table 7

[0067]

[0068]

[0069] Weigh each component in proportion and mix them evenly to obtain the tobacco flavored electronic cigarette oil. The oil is clear in color and free of suspended matter, slightly soluble matter, and insoluble matter. In this patent, butyric acid and leaf alcohol can reduce the viscosity of the oil and increase the oil conduction rate. Therefore, in Example 4, butyric acid and leaf alcohol are not added. Compared with Example 1, the viscosity of the electronic cigarette is increased, and the oil conduction time is increased. The physical indicators of the electronic cigarette oil are: viscosity is 193.2cp, density is 1.11g / cm 3 , oil conduction time 8.80s, refractive index 1.4489nD, surface tension 48.95mN / m. Compared with Example 1, the chemical indicators have little change, so they will not be repeated.

[0070] Example 5

[0071] This embodiment provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0072] Table 8

[0073]

[0074]

[0075] Weigh each component in proportion and mix them evenly to obtain the tobacco flavored electronic cigarette oil. The oil is clear in color and free of suspended matter, slightly soluble matter, and insoluble matter; VG affects the viscosity and oil conduction time of the oil. Therefore, the VG content in Example 5 is higher than that in Example 2, resulting in high viscosity and long oil conduction time. The physical indicators of the electronic cigarette oil are: viscosity at 210.2cp, density 1.13g / cm 3 , oil conduction time 9.20s, refractive index 1.4534nD, surface tension 41.02mN / m; compared with Example 2, the chemical indicators did not change much, so they will not be repeated.

[0076] Comparative Example 1

[0077] This comparative example provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0078] Table 9

[0079]

[0080]

[0081] The chemical indicators of the electronic cigarette oil are: See the table below for details, which shows that the inorganic salt content is higher than that in Example 1.

[0082] Table 10

[0083] Substances and units content fructose% 0.00025 glucose% 0.00025 sucrose% 0.0005 maltose% 0.0005 Cellulose % 0.005 Hemicellulose% 0.0005 Pectin% 0.00025 starch% 0.005 Sodium mg / kg 1.71 Potassium mg / kg 202.1 Magnesium mg / kg 15.8

[0084] Comparative Example 2

[0085] This comparative example provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0086] Table 11

[0087]

[0088] The chemical indicators of the electronic cigarette oil are: See the table below for details, which shows that the polysaccharide content is higher than that in Example 1.

[0089] Table 12

[0090] Substances and units content fructose% 0.00025 glucose% 0.00025 sucrose% 0.0005 maltose% 0.0005 Cellulose % 0.1052 Hemicellulose% 0.1007 Pectin% 0.0779 starch% 0.0328 Sodium mg / kg 0.025 Potassium mg / kg 0.00125 Magnesium mg / kg 0.0005

[0091] Comparative Example 3

[0092] This comparative example provides a tobacco flavored electronic cigarette oil, the formula composition and the amount of each component are shown in the following table:

[0093] Table 13

[0094]

[0095]

[0096] The chemical indicators of the electronic cigarette oil are: See the table below for details, which shows that the content of monosaccharides and disaccharides is higher than that of Example 1.

[0097] Table 14

[0098] Substances and units content fructose% 0.1132 glucose% 0.1261 sucrose% 0.0108 maltose% 0.0205 Cellulose % 0.005 Hemicellulose% 0.0005 Pectin% 0.00025 starch% 0.005 Sodium mg / kg 0.025 Potassium mg / kg 0.00125 Magnesium mg / kg 0.0005

[0099] Test Case

[0100] 1. Sensory quality evaluation

[0101] The taste evaluation criteria are as described in the following table, which mainly include the following evaluation indicators: aroma concentration, irritation (miscellaneous smell), smoke volume, sweetness, throat hit, smoke humidity, aroma restoration, coordination, and satisfaction. The maximum score of each evaluation indicator is 10 points, and each evaluation indicator is scored in 0.5 points. Except for irritation (miscellaneous smell), which is negatively scored, the other indicators are positively scored.

[0102] The meaning of the 8 indicators is: aroma concentration: the degree of overall smoke sensory intensity in the nasal cavity and oral cavity; irritation: the sensory perception of smoke after atomization of electronic cigarette liquid in the oral cavity, throat, and nasal cavity, such as granularity, tingling, and miscellaneous gas; smoke volume: the total amount of aerosol formed after atomization of electronic cigarette liquid, and the amount of smoke visually perceived through the oral cavity and after exhalation. Sweetness: the intensity of sweetness perceived in the oral cavity after atomization of electronic cigarette liquid and the intensity of sweet fragrance perceived in the nasal cavity; throat hit: the physical sensory intensity of smoke impacting the throat after inhaling aerosol; smoke humidity: the degree of dryness and wetness perceived by the oral cavity and nasal cavity of smoke particle droplet molecules; coordination: the mixing uniformity and coordination of the aroma after atomization of electronic cigarette liquid. Satisfaction, the feeling of short-term brain excitement reflected by nicotine being absorbed by the lungs under the same number of puffs, can be symptoms such as numbness and dizziness in the head.

[0103] Table 15 Sensory quality evaluation standards for electronic cigarette liquid

[0104]

[0105] Evaluation method: Provide the smoking tasting technical experts with examples, comparative samples and sensory quality evaluation standard tables, and evaluate each indicator according to the requirements of the tables.

[0106] Statistical method: The evaluation results of all product evaluation team members are valid. The arithmetic mean of the individual evaluation results of each product evaluation member is calculated and the result is rounded to one decimal place.

[0107] Table 16

[0108]

[0109] From the test results in the above table, it can be seen that the sensory quality comparison of tobacco-flavored e-liquids with different treatments shows that the sensory evaluation results of the tobacco-flavored electronic cigarette e-liquid that conforms to the technical solution of the present invention are that the tobacco aroma is sufficient, the smoke aroma is rich, the aftertaste is comfortable, and the throat hit, aroma restoration, and satisfaction are better than those of the commercially available tobacco-flavored e-liquid.

[0110] 2. Carbon deposit test

[0111] The CORESTA recommended method CRM81 was used to smoke the electronic cigarette, and the smoking parameters were as follows: puff duration 3s, puff interval 30s, puff volume 55mL, smoking device 8w, 2mL cartridge.

[0112] After taking 200 puffs of each example and commercially available tobacco flavored e-liquid, obtain a photo of the ceramic atomizer core under a 20x optical microscope. Figure 1-4 As shown in the figure, it can be seen that the carbon deposition of the tobacco-flavored electronic cigarette oil provided in the embodiment of the present invention is significantly reduced, both on the heating film and the heating element.

[0113] 3. Smoke volume comparison

[0114] The comparison of the average smoke volume of 200 puffs of each embodiment and the commercially available tobacco flavored e-liquid in the ceramic atomizer core is shown in the table below. The results show that the average smoke volume of 200 puffs of the e-liquid provided by the embodiments of the present invention is greater than that of the control sample, indicating that the patent has a significant effect.

[0115] Table 17

[0116] Different treatment Average smoke volume (mg / puff) Commercially available tobacco flavored e-liquid (control sample) 6.80 Example 1 8.70 Example 2 8.47 Example 3 8.31 Example 4 8.12 Example 5 8.03 Comparative Example 1 7.65 Comparative Example 2 7.47 Comparative Example 3 7.39

[0117] 4. Smoke attenuation

[0118] The attenuation rates of the tobacco-flavored e-liquids in various embodiments and on the market after 200 puffs of the ceramic atomizer core are compared in the following table. The results show that the attenuation rates of the e-liquids provided in the embodiments of the present invention after 200 puffs of the ceramic atomizer core are lower than those of the control sample and the comparative example, indicating that the present invention has a significant effect.

[0119] Table 18

[0120]

[0121] 5. Ceramic atomizer core bare chip maximum temperature test

[0122] The highest temperature point test method is as follows: the electronic cigarette heating element is placed in a bare chip fixture filled with smoke oil, the puffing parameters are set to a puffing duration of 3s and a puffing interval of 8s, and an infrared thermal imager is used to detect the temperature of the electronic cigarette heating element to detect the highest temperature point of the heating element within 3s of puffing.

[0123] The results of the comparison test of the highest temperature point of the atomizer core bare chip of each embodiment and the tobacco flavored e-cigarette liquid on the market are shown in the table below. The results show that the highest temperature point of the atomizer core bare chip of the tobacco flavored e-cigarette liquid provided by the embodiment of the present invention is lower than that of the control sample and the comparative example, indicating that the present invention can avoid carbon deposition and burning, and the effect is significant.

[0124] Table 19

[0125]

[0126]

[0127] 6. The resistance change rate of the ceramic atomizer core before and after

[0128] The resistance change rate of the ceramic atomizer core before and after 200 puffs of each embodiment and the tobacco-flavored e-liquid on the market is shown in the following table. The results show that the resistance change rate of the atomizer core of the tobacco-flavored e-cigarette e-liquid provided by the embodiment of the present invention is less than that of the control sample and the comparative example, indicating that the present invention has a significant effect in slowing down the fluctuation of the atomizer core resistance.

[0129] Table 20

[0130]

[0131]

[0132] 7. Comparison of carbon area ratio of heat volume after 200 puffs

[0133] The two-dimensional processed image of the ceramic atomizer core after 200 puffs of each embodiment and commercially available tobacco-flavored e-liquid (puffing method: puffing the electronic cigarette using the CORESTA recommended method CRM81, with puffing parameters of 3s puffing duration, 30s puffing interval, and 55mL puffing volume. The smoking device was 8w, and the 2mL cigarette cartridge was used) Figure 5-8 The results of the carbon deposition area ratio of the atomizer core of the tobacco flavored electronic cigarette oil provided in the embodiment of the present invention are shown in the table below. The results show that the carbon deposition area ratio of the atomizer core of the tobacco flavored electronic cigarette oil provided in the embodiment of the present invention is smaller than that of the control sample and the comparative example.

[0134] Table 21

[0135]

[0136] From the comparison of the data in the above tables, it can be seen that by limiting the content of sugar substances and inorganic metal elements, compared with the existing commercially available tobacco flavored e-liquid, the impact on a series of atomization properties of the ceramic atomization core can be significantly reduced, such as: reducing carbon deposition, reducing smoke volume attenuation, reducing taste attenuation, and slowing down resistance fluctuations.

[0137] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. A tobacco-flavored electronic cigarette oil, characterized in that: The composition comprises the following components in percentage by weight: solvent 75-95%, nicotine component ≤2%, tobacco extract 1-15%, additive ≤10%; Wherein, the content of polysaccharides in the e-liquid is controlled to be ≤0.0215%, the total content of monosaccharides and disaccharides is ≤0.003%, and the content of inorganic metal elements is ≤30 mg / kg.

2. The tobacco flavored electronic cigarette oil according to claim 1, characterized in that: The content of pectin in the tobacco oil is ≤0.0005%, the content of hemicellulose is ≤0.001%, the content of starch is ≤0.01%, and the content of cellulose is ≤0.01%.

3. The tobacco flavored electronic cigarette oil according to claim 1, characterized in that: The fructose content in the e-liquid is ≤0.0005%, the glucose content is ≤0.0005%, the sucrose content is ≤0.001%, and the maltose content is ≤0.001%.

4. The tobacco flavored electronic cigarette oil according to claim 1, characterized in that: The sodium content in the e-liquid is ≤0.5 mg / kg, the potassium content is ≤25 mg / kg, and the magnesium content is ≤1 mg / kg.

5. The tobacco flavored electronic cigarette liquid according to any one of claims 1 to 4, characterized in that: The additive includes butyric acid and leaf alcohol. Based on the total mass of the tobacco-flavored electronic cigarette oil, the mass percentage of butyric acid is 0.5-2%, and the mass percentage of leaf alcohol is 0.1-0.5%.

6. The tobacco flavored electronic cigarette liquid according to any one of claims 1 to 4, characterized in that: The solvent includes at least one of ethanol, propylene glycol, glycerin and water; and / or, the nicotine component comprises at least one of nicotine or a nicotine salt; And / or, the selection and addition amount of the additives meet the requirements of national standard GB41700-2022.

7. The tobacco flavored electronic cigarette liquid according to claim 6, characterized in that: The content of glycerol is 20-80%, and the content of water is below 2%, so as to control the viscosity of the e-liquid to be below 300cp.

8. The tobacco flavored electronic cigarette liquid according to any one of claims 1 to 7, characterized in that: In the tobacco extract, the content of polysaccharides is ≤2.15%, the content of monosaccharides and disaccharides is ≤0.25%, and the content of inorganic metal elements is ≤5.26%.

9. The tobacco flavored electronic cigarette liquid according to claim 8, characterized in that: In the tobacco extract, the pectin content is ≤0.05%, the hemicellulose content is ≤0.1%, and the total content of starch and cellulose is ≤1%; and / or, fructose content ≤ 0.05%, glucose content ≤ 0.05%, sucrose content ≤ 0.05%, maltose content ≤ 0.1%; And / or, the sodium content is ≤5%, the potassium content is ≤0.25%, and the magnesium content is ≤0.01%.

10. A method for preparing the tobacco flavored electronic cigarette oil according to any one of claims 1 to 9, characterized in that: The steps include: Weigh each component in proportion and mix them to obtain the tobacco-flavored electronic cigarette oil.

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