A kind of flue-cured tobacco aroma base and preparation method thereof

Abstract

The invention discloses a flue-cured tobacco aroma base and a preparation method thereof, and belongs to the technical field of tobacco flavors. The flue-cured tobacco aroma base comprises the following components: nicotine, 5-hydroxymethylfurfural, 2,3-dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one, acetic acid, furfural, ethyl succinate, 2-phenylphenol, furfuryl alcohol, benzoic acid, phenylacetic acid, benzyl alcohol, methylcyclopentenol ketone, phenylethyl alcohol, ethyl lactate, hydroxyacetone, and pyridine. The flue-cured tobacco aroma base of the present invention retains the flue-cured tobacco aroma components of tobacco, is more harmonious with cigarettes, and is used for cigarette flavoring, which can highlight the flue-cured tobacco aroma of cigarette products, increase the aroma and smoke concentration, and improve the quality of cigarettes.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco flavorings, and in particular to a flue-cured tobacco flavor base and a preparation method thereof. Background Art

[0002] In recent decades, consumers have put forward higher requirements and expectations for the aroma style and smoking quality of cigarette products, and tobacco flavors and fragrances have greatly affected the aroma style and smoking quality of cigarette products, and also changed the product characteristics of cigarette brands. With the deepening of the tobacco industry's work on reducing tar and reducing harm, the lack of flue-cured tobacco aroma has gradually become a problem that needs to be solved for new low-tar, slim cigarette products, etc. The national standard for electronic cigarettes requires that the characteristic flavor of electronic cigarette products should not present any flavor other than tobacco, so tobacco extracts have become an important natural fragrance raw material for flavoring electronic cigarette liquids.

[0003] Tobacco extract refers to the spices directly extracted from tobacco, such as flue-cured tobacco extract, tobacco oil, etc. Tobacco extract uses tobacco leaves as raw materials, and contains tobacco leaf components such as maltol, methylcyclopentenolone, and megastigmatrienone. It has the effect of supplementing the characteristic aroma of tobacco and transmitting the original aroma of tobacco. It can enhance the aroma of new cigarette products or give tobacco flavor to electronic cigarette products. In addition, tobacco extract comes from tobacco leaves, is not restricted by the list of tobacco additives, and its safety is also guaranteed. However, as a product directly processed from tobacco, tobacco extracts often contain other aroma components in addition to the aroma components of flue-cured tobacco, which makes the preparation of tobacco flavors a creative work relying on the skills of flavorists, and its cost and success rate are greatly limited. In addition to directly using tobacco extracts, the existing tobacco flavor preparation can also enhance the aroma of flue-cured tobacco by adding monomeric spices. However, since tobacco leaves contain a variety of aroma components, although the main aroma is generally flue-cured tobacco aroma, it is often mixed with other aromas, which makes the tobacco aroma not harmonious enough. Therefore, the method and application of improving the quality of tobacco aroma by directly using tobacco extracts or adding monomeric spices are greatly limited.

[0004] Fragrance base, also known as base fragrance or main fragrance, is the main aroma component of flavors and the main body of flavor formulas. It is used in the largest amount, so it is called a semi-finished product of flavors. Flavor blending can be simplified into a combination of different aroma bases, thereby increasing the success rate of flavoring. However, most of the current fragrance base products have fruity, sweet, milky and other fragrances, and there are very few flue-cured tobacco aroma bases, and there are even fewer reports on flue-cured tobacco aroma bases directly extracted from tobacco extracts. Therefore, it is crucial to research and develop a flue-cured tobacco aroma base directly extracted from tobacco extracts and use it to improve the quality and flavor of tobacco products. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a flue-cured tobacco aroma base and a preparation method thereof. The flue-cured tobacco aroma base retains the flue-cured tobacco aroma components of tobacco and is used for flavoring cigarettes, which can highlight the flue-cured tobacco aroma of cigarette products and make the aroma harmonious.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a flue-cured tobacco aroma base, comprising the following components: nicotine, 5-hydroxymethylfurfural, 2,3-dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one, acetic acid, furfural, ethyl succinate, 2-phenylphenol, furfuryl alcohol, benzoic acid, phenylacetic acid, benzyl alcohol, methylcyclopentenolone, phenylethyl alcohol, ethyl lactate, hydroxyacetone, and pyridine. Preferably, the flue-cured tobacco aroma base comprises:

[0008] Nicotine: 10-12 parts by weight;

[0009] 5-Hydroxymethylfurfural: 4-5 parts by weight;

[0010] 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.4-0.7 parts by weight;

[0011] Acetic acid: 0.2-0.6 parts by weight;

[0012] Furfural: 0.3-0.5 parts by weight;

[0013] Succinic acid monoethyl ester: 0.1-0.3 parts by weight;

[0014] 2-phenylphenol: 0.1-0.2 parts by weight;

[0015] Furfuryl alcohol: 0.1-0.2 parts by weight;

[0016] Benzoic acid: 0.06-0.15 parts by weight;

[0017] Phenylacetic acid: 0.06-0.15 parts by weight;

[0018] Benzyl alcohol: 0.05-0.15 parts by weight;

[0019] Methylcyclopentenolone: ​​0.05-0.10 parts by weight;

[0020] Phenethyl alcohol: 0.03-0.07 parts by weight;

[0021] Ethyl lactate: 0.01-0.05 parts by weight;

[0022] Hydroxyacetone: 0.01-0.05 parts by weight;

[0023] Pyridine: 0.002-0.05 parts by weight.

[0024] Preferably, the flue-cured tobacco aroma base comprises:

[0025] Nicotine: 10.55 parts by weight;

[0026] 5-Hydroxymethylfurfural: 4.87 parts by weight;

[0027] 2,3-dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.55 parts by weight; acetic acid: 0.43 parts by weight;

[0028] Furfural: 0.41 parts by weight;

[0029] Monoethyl succinate: 0.26 parts by weight;

[0030] 2-phenylphenol: 0.15 parts by weight;

[0031] Furfuryl alcohol: 0.11 parts by weight;

[0032] Benzoic acid: 0.11 parts by weight;

[0033] Phenylacetic acid: 0.11 parts by weight;

[0034] Benzyl alcohol: 0.10 parts by weight;

[0035] Methylcyclopentenolone: ​​0.08 parts by weight;

[0036] Phenethyl alcohol: 0.05 parts by weight;

[0037] Ethyl lactate: 0.03 parts by weight;

[0038] Hydroxyacetone: 0.03 parts by weight;

[0039] Pyridine: 0.03 parts by weight.

[0040] Preferably, the flue-cured tobacco aroma base comprises:

[0041] Nicotine: 10.01 parts by weight;

[0042] 5-Hydroxymethylfurfural: 4.95 parts by weight;

[0043] 2,3-dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.67 parts by weight; acetic acid: 0.22 parts by weight;

[0044] Furfural: 0.31 parts by weight;

[0045] Ethyl succinate: 0.13 parts by weight;

[0046] 2-phenylphenol: 0.20 parts by weight;

[0047] Furfuryl alcohol: 0.18 parts by weight;

[0048] Benzoic acid: 0.06 parts by weight;

[0049] Phenylacetic acid: 0.15 parts by weight;

[0050] Benzyl alcohol: 0.05 parts by weight;

[0051] Methylcyclopentenolone: ​​0.10 parts by weight;

[0052] Phenethyl alcohol: 0.07 parts by weight;

[0053] Ethyl lactate: 0.01 parts by weight;

[0054] Hydroxyacetone: 0.01 parts by weight;

[0055] Pyridine: 0.05 parts by weight.

[0056] Preferably, the flue-cured tobacco aroma base comprises:

[0057] Nicotine: 11.89 parts by weight;

[0058] 5-Hydroxymethylfurfural: 4.12 parts by weight;

[0059] 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.40 parts by weight;

[0060] Acetic acid: 0.56 parts by weight;

[0061] Furfural: 0.45 parts by weight;

[0062] Succinic acid monoethyl ester: 0.28 parts by weight;

[0063] 2-phenylphenol: 0.10 parts by weight;

[0064] Furfuryl alcohol: 0.11 parts by weight;

[0065] Benzoic acid: 0.15 parts by weight;

[0066] Phenylacetic acid: 0.06 parts by weight;

[0067] Benzyl alcohol: 0.15 parts by weight;

[0068] Methylcyclopentenolone: ​​0.05 parts by weight;

[0069] Phenethyl alcohol: 0.03 parts by weight;

[0070] Ethyl lactate: 0.05 parts by weight;

[0071] Hydroxyacetone: 0.05 parts by weight;

[0072] Pyridine: 0.002 parts by weight.

[0073] Adding the above-mentioned flue-cured tobacco aroma base into cigarette products can significantly increase the aroma of the flue-cured tobacco aroma of the cigarette products and improve the smoking experience of the cigarette products.

[0074] The present invention also provides a method for preparing flue-cured tobacco aroma base. The tobacco extract is separated by gel chromatography to obtain a fraction containing flue-cured tobacco aroma, which is then combined and concentrated to obtain the flue-cured tobacco aroma base.

[0075] Preferably, the chromatographic column filler used in the gel chromatography method is selected from Sephadex LH-20.

[0076] Preferably, the mobile phase of the gel chromatography is selected from ethanol.

[0077] Preferably, the flow rate of the mobile phase is 1 to 3 mL / min. In some specific embodiments of the present invention, the flow rate of the mobile phase is 1 mL / min or 3 mL / min.

[0078] The present invention uses a fraction collector to automatically collect fractions according to time, and sets the automatic collection time according to the flow rate of the mobile phase to ensure that the collection volume of each tube fraction does not exceed 10 mL.

[0079] Tobacco extract contains a variety of aroma components. The present invention uses gel chromatography separation technology to separate the aroma components in the tobacco extract, accurately locates the fraction containing flue-cured tobacco aroma through olfactory evaluation by professional evaluators, and combines and concentrates them to obtain the flue-cured tobacco aroma base.

[0080] The method for preparing the above-mentioned flue-cured tobacco aroma base comprises the following steps in some specific embodiments of the present invention:

[0081] 1) The tobacco extract is dissolved in ethanol and separated by a gel chromatography column, with ethanol being used as the mobile phase for elution. When the ultraviolet detector signal begins to rise, the fractions are collected, and the collection volume in each tube does not exceed 10 mL.

[0082] 2) By conducting olfactory evaluation on the collected fractions, the fractions with significant flue-cured tobacco aroma are selected and combined.

[0083] 3) removing the solvent from the combined fractions to obtain flue-cured tobacco aroma bases. The present invention has no particular limitation on the method for removing the solvent, and the method may be rotary evaporation, vacuum drying, or other methods well known to those skilled in the art.

[0084] In some specific embodiments of the present invention, a variety of aroma components in tobacco extract are separated by a gel chromatography column with a size of 2.6×100 cm and filled with Sephadex LH-20, and the fractions containing flue-cured tobacco aroma are combined and concentrated to obtain flue-cured tobacco aroma base.

[0085] The method for preparing the flue-cured tobacco aroma base is specifically as follows: ethanol is used as a mobile phase to elute the tobacco extract at a fixed flow rate.

[0086] When the UV detector signal starts to rise, the fractions are automatically collected. When the flow rate is 3 mL / min, fractions are collected every 3.2 minutes, and 45 tubes are collected in total, of which the 23rd to 29th tubes have typical flue-cured tobacco aroma characteristics; when the flow rate is 1 mL / min, fractions are collected every 10 minutes, and 42 tubes are collected in total, of which the 24th to 29th tubes have typical flue-cured tobacco aroma characteristics; when the flow rate is 3 mL / min, fractions are collected every 3 minutes, and 50 tubes are collected in total, of which the 22nd to 30th tubes have typical flue-cured tobacco aroma characteristics. The fractions with typical flue-cured tobacco aroma characteristics are combined and concentrated by rotary evaporation to obtain the flue-cured tobacco aroma base.

[0087] The present invention also provides a cigarette product, comprising a flue-cured tobacco aroma base added to the cigarette product.

[0088] Preferably, the flue-cured tobacco aroma base is the above-mentioned flue-cured tobacco aroma base or the flue-cured tobacco aroma base prepared by the above-mentioned preparation method.

[0089] Preferably, the amount of the flue-cured tobacco aroma base added is 0.05wt% to 0.15wt% of the weight of the tobacco shreds in the cigarette product. In a specific embodiment of the present invention, the amount of the flue-cured tobacco aroma base added is 0.1wt% of the weight of the tobacco shreds in the cigarette product.

[0090] Compared with the prior art, the flue-cured tobacco aroma base provided by the present invention comprises the following components: nicotine, 5-hydroxymethylfurfural, 2,3-dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one, acetic acid, furfural, ethyl succinate, 2-phenylphenol, furfuryl alcohol, benzoic acid, phenylacetic acid, benzyl alcohol, methylcyclopentenol ketone, phenylethyl alcohol, ethyl lactate, hydroxyacetone, and pyridine. The flue-cured tobacco aroma base of the present invention retains the flue-cured tobacco aroma components of tobacco, is more harmonious with cigarettes, and is used for flavoring cigarettes, which can highlight the flue-cured tobacco aroma of cigarette products, increase the aroma and smoke concentration, and improve the quality of cigarettes. DETAILED DESCRIPTION

[0091] In order to further illustrate the present invention, the flue-cured tobacco aroma base and the preparation method thereof provided by the present invention are described in detail below in conjunction with embodiments.

[0092] Example 1

[0093] The gel chromatography column filler is Sephadex LH-20, which is swollen with ethanol and loaded into a 2.6×100cm chromatographic column and rinsed with ethanol for 24 hours. Select Ruisheng Yunnan tobacco leaf extract, take 5g and dissolve it in 10mL ethanol, and use it for gel chromatography separation. The tobacco leaf extract is eluted with a single mobile phase of ethanol at a fixed flow rate. When the UV detector signal begins to rise, the fractions are automatically collected by time through the fraction collector, with a flow rate of 3mL / min, and fractions are collected every 3.2min, for a total of 45 tubes. The evaluation results of 5 olfactory evaluators are that the 23rd to 29th tubes have typical flue-cured tobacco aroma characteristics. The fractions are combined and concentrated by rotary evaporation to obtain 1.2mL of flue-cured tobacco aroma base. The flue-cured tobacco aroma base was measured by gas chromatography-mass spectrometry, and the mass percentage includes the following components:

[0094] Nicotine: 10.55%;

[0095] 5-Hydroxymethylfurfural: 4.87%;

[0096] 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.55%;

[0097] Acetic acid: 0.43%;

[0098] Furfural: 0.41%;

[0099] Succinic acid monoethyl ester: 0.26%;

[0100] 2-phenylphenol: 0.15%;

[0101] Furfuryl alcohol: 0.11%;

[0102] Benzoic acid: 0.11%;

[0103] Phenylacetic acid: 0.11%;

[0104] Benzyl alcohol: 0.10%;

[0105] Methylcyclopentenolone: ​​0.08%;

[0106] Phenylethanol: 0.05%;

[0107] Ethyl lactate: 0.03%;

[0108] Hydroxyacetone: 0.03%;

[0109] Pyridine: 0.03%.

[0110] The solvent is propylene glycol.

[0111] Example 2

[0112] The gel chromatography column filler is Sephadex LH-20, which is swollen with ethanol and loaded into a 2.6×100 cm chromatographic column and rinsed with ethanol for 24 hours. Select the Japanese island Zimbabwe tobacco extract, take 5g and dissolve it in 10mL ethanol, and use it for gel chromatography separation. The tobacco leaf extract is eluted with a single mobile phase of ethanol at a fixed flow rate. When the ultraviolet detector signal begins to rise, the flow fractions are automatically collected by the flow collector according to time, the flow rate is 1mL / min, and the flow fractions are collected every 10min, and a total of 42 tubes are collected. The evaluation results of 5 olfactory evaluators are that the 24th to 29th tubes have typical flue-cured tobacco aroma characteristics. The flow fractions are combined and concentrated by rotary evaporation to obtain 1.0mL of flue-cured tobacco aroma base. The flue-cured tobacco aroma base was measured by gas chromatography-mass spectrometry, and the mass percentage includes the following components:

[0113] Nicotine: 10.01%;

[0114] 5-Hydroxymethylfurfural: 4.95%;

[0115] 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.67%;

[0116] Acetic acid: 0.22%;

[0117] Furfural: 0.31%;

[0118] Monoethyl succinate: 0.13%;

[0119] 2-phenylphenol: 0.20%;

[0120] Furfuryl alcohol: 0.18%;

[0121] Benzoic acid: 0.06%;

[0122] Phenylacetic acid: 0.15%;

[0123] Benzyl alcohol: 0.05%;

[0124] Methylcyclopentenolone: ​​0.10%;

[0125] Phenylethanol: 0.07%;

[0126] Ethyl lactate: 0.01%;

[0127] Hydroxyacetone: 0.01%;

[0128] Pyridine: 0.05%.

[0129] The solvent is propylene glycol.

[0130] Example 3

[0131] The gel chromatography column filler is Sephadex LH-20, which is swollen with ethanol and loaded into a 2.6×100 cm chromatographic column and rinsed with ethanol for 24 hours. Select Zhipu Brazilian tobacco extract, take 5g and dissolve it in 10mL ethanol, and use it for gel chromatography separation. Use single mobile phase ethanol to elute the tobacco leaf extract at a fixed flow rate. When the ultraviolet detector signal begins to rise, the flow fractions are automatically collected according to time through the flow fraction collector, the flow rate is 3mL / min, and the flow fractions are collected every 3min, and a total of 50 tubes are collected. The evaluation results of 5 olfactory evaluators are that the 22nd to 30th tubes have typical flue-cured tobacco aroma characteristics. The flow fractions are combined and concentrated by rotary evaporation to obtain 1.2mL of flue-cured tobacco aroma base. The flue-cured tobacco aroma base was measured by gas chromatography-mass spectrometry, and the mass percentage includes the following components:

[0132] Nicotine: 11.89%;

[0133] 5-Hydroxymethylfurfural: 4.12%;

[0134] 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.40%;

[0135] Acetic acid: 0.56%;

[0136] Furfural: 0.45%;

[0137] Monoethyl succinate: 0.28%;

[0138] 2-phenylphenol: 0.10%;

[0139] Furfuryl alcohol: 0.11%;

[0140] Benzoic acid: 0.15%;

[0141] Phenylacetic acid: 0.06%;

[0142] Benzyl alcohol: 0.15%;

[0143] Methylcyclopentenolone: ​​0.05%;

[0144] Phenylethanol: 0.03%;

[0145] Ethyl lactate: 0.05%;

[0146] Hydroxyacetone: 0.05%;

[0147] Pyridine: 0.002%.

[0148] The solvent is propylene glycol.

[0149] Verification experiment

[0150] The flue-cured tobacco aroma base provided in the above Examples 1-3 was evaluated for its fresh aroma, sweet aroma, hay aroma, spicy aroma, woody aroma, green aroma, herbal aroma, baking aroma, flue-cured tobacco aroma, and sour aroma characteristics by referring to the method specified in "GB / T 10220-2012 / ISO6658-2005 General Theory of Sensory Analysis Methodology". The various aromas were scored using a 10-point system, where 0 means no such aroma, 1-2 means slightly present, 3-5 means present, 6-8 means relatively strong, and 9-10 means strong. The evaluation results are shown in Table 1.

[0151] Table 1 Evaluation results of the aroma base of flue-cured tobacco

[0152]

[0153] Note: The olfactory evaluation results in the table are the average scores of 5 professional judges.

[0154] In the production process of cigarette flavoring, the flue-cured tobacco aroma base provided in the above Examples 1-3 was added to shredded tobacco in an amount of 0.1wt% to obtain 3 types of flue-cured tobacco shredded tobacco, and then the 3 types of shredded tobacco were respectively made into 3 types of cigarettes with different flue-cured tobacco aromas, and then the 3 types of cigarettes with different flue-cured tobacco aromas were evaluated and identified. After the evaluation and identification by the Smoking Evaluation Committee of Jilin Tobacco Industry Co., Ltd. in accordance with the "YC / T 497-2014 Sensory Evaluation Method for Chinese Cigarette Style" and the "YC / T 415-2011 Sensory Evaluation Method for Tobacco In-Products", it was unanimously agreed that the flue-cured tobacco aroma of the cigarettes was significantly increased, and the aroma volume, aroma quality and smoke concentration of the cigarettes were significantly improved when smoking.

[0155] Taking the flue-cured tobacco aroma base provided in Example 1 as an example, the above aroma base was directly sprayed on tobacco shreds at an addition amount of 0.1% to obtain flue-cured tobacco shreds, and then the flue-cured tobacco shreds were made into cigarettes for smoking test. The results are shown in Table 2.

[0156] Table 2 Evaluation results of cigarette aroma style, smoke and comfort characteristics

[0157]

[0158]

[0159] Note: The smoking evaluation was conducted in accordance with tobacco industry standards YC / T 497-2014 and YC / T 415-2011. The evaluation results are the average of the scores of 7 judges.

[0160] In summary, the flue-cured tobacco aroma base of the present invention has a strong flue-cured tobacco aroma, and is used for flavoring cigarettes to increase the flue-cured tobacco aroma of cigarette products. In addition, the preparation method of the flue-cured tobacco aroma base of the present invention is simple, which can greatly reduce production costs and improve cigarette quality.

[0161] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A flue-cured tobacco aroma base, characterized in that: Includes the following components: Nicotine: 10-12 parts by weight; 5-Hydroxymethylfurfural: 4-5 parts by weight; 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.4-0.7 parts by weight; Acetic acid: 0.2-0.6 parts by weight; Furfural: 0.3-0.5 parts by weight; Monoethyl succinate: 0.1-0.3 parts by weight; 2-phenylphenol: 0.1-0.2 parts by weight; Furfuryl alcohol: 0.1-0.2 parts by weight; Benzoic acid: 0.06-0.15 parts by weight; Phenylacetic acid: 0.06-0.15 parts by weight; Benzyl alcohol: 0.05-0.15 parts by weight; Methylcyclopentenolone: ​​0.05-0.10 parts by weight; Phenethyl alcohol: 0.03-0.07 parts by weight; Ethyl lactate: 0.01-0.05 parts by weight; Hydroxyacetone: 0.01-0.05 parts by weight; Pyridine: 0.002~0.05 parts by weight.

2. The flue-cured tobacco aroma base according to claim 1, characterized in that The flue-cured tobacco aroma base comprises: Nicotine: 10.55 parts by weight; 5-Hydroxymethylfurfural: 4.87 parts by weight; 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.55 parts by weight; Acetic acid: 0.43 parts by weight; Furfural: 0.41 parts by weight; Monoethyl succinate: 0.26 parts by weight; 2-phenylphenol: 0.15 parts by weight; Furfuryl alcohol: 0.11 parts by weight; Benzoic acid: 0.11 parts by weight; Phenylacetic acid: 0.11 parts by weight; Benzyl alcohol: 0.10 parts by weight; Methylcyclopentenolone: ​​0.08 parts by weight; Phenethyl alcohol: 0.05 parts by weight; Ethyl lactate: 0.03 parts by weight; Hydroxyacetone: 0.03 parts by weight; Pyridine: 0.03 parts by weight.

3. The flue-cured tobacco aroma base according to claim 1, characterized in that The flue-cured tobacco aroma base comprises: Nicotine: 10.01 parts by weight; 5-Hydroxymethylfurfural: 4.95 parts by weight; 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.67 parts by weight; Acetic acid: 0.22 parts by weight; Furfural: 0.31 parts by weight; Ethyl succinate: 0.13 parts by weight; 2-phenylphenol: 0.20 parts by weight; Furfuryl alcohol: 0.18 parts by weight; Benzoic acid: 0.06 parts by weight; Phenylacetic acid: 0.15 parts by weight; Benzyl alcohol: 0.05 parts by weight; Methylcyclopentenolone: ​​0.10 parts by weight; Phenethyl alcohol: 0.07 parts by weight; Ethyl lactate: 0.01 parts by weight; Hydroxyacetone: 0.01 parts by weight; Pyridine: 0.05 parts by weight.

4. The flue-cured tobacco aroma base according to claim 1, characterized in that The flue-cured tobacco aroma base comprises: Nicotine: 11.89 parts by weight; 5-Hydroxymethylfurfural: 4.12 parts by weight; 2,3-Dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one: 0.40 parts by weight; Acetic acid: 0.56 parts by weight; Furfural: 0.45 parts by weight; Monoethyl succinate: 0.28 parts by weight; 2-phenylphenol: 0.10 parts by weight; Furfuryl alcohol: 0.11 parts by weight; Benzoic acid: 0.15 parts by weight; Phenylacetic acid: 0.06 parts by weight; Benzyl alcohol: 0.15 parts by weight; Methylcyclopentenolone: ​​0.05 parts by weight; Phenethyl alcohol: 0.03 parts by weight; Ethyl lactate: 0.05 parts by weight; Hydroxyacetone: 0.05 parts by weight; Pyridine: 0.002 parts by weight.

5. A method for preparing the flue-cured tobacco aroma base according to any one of claims 1 to 4, characterized in that: The tobacco extract is separated by gel chromatography to obtain a fraction containing flue-cured tobacco aroma, which is combined and concentrated to obtain flue-cured tobacco aroma base.

6. The method for preparing flue-cured tobacco aroma base according to claim 5, characterized in that: The chromatographic column filler used in the gel chromatography method is selected from Sephadex LH-20.

7. The method for preparing flue-cured tobacco aroma base according to claim 5, characterized in that: The mobile phase of the gel chromatography is selected from ethanol.

8. The method for preparing flue-cured tobacco aroma base according to claim 7, characterized in that: The flow rate of the mobile phase is 1-3 mL / min.

9. A cigarette product, characterized in that: Including flue-cured tobacco aroma base added to tobacco products; The flue-cured tobacco aroma base is the flue-cured tobacco aroma base described in any one of claims 1 to 4 or the flue-cured tobacco aroma base prepared by the preparation method described in any one of claims 5 to 8.

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