TW201511695A - A tobacco material and a method of making the same - Google Patents

Abstract

This invention provides a tobacco material with good flavor and taste, and a method of making the same. The tobacco material is that a ration of weight of the extract obtained by extraction using n-hexane as solvent, and weight of the extract obtained by extraction using water as solvent after the extract obtained by extraction using n-hexane as solvent is 0 to 1.5 as ration of weight of the extract by water/weight of the extract by hexane.

Description

Tobacco raw material and manufacturing method thereof

The present invention relates to a tobacco material and a method of producing the same.

In the method of adjusting the flavor of the smoke, the technique of extracting and removing the specific component from the tobacco leaf material, or extracting the extract and the residue after the extraction of the tobacco leaf material, and performing predetermined treatment on the obtained extract liquid, etc. Thereafter, the technique of reclaiming the residue into the extract is known.

As a technique for extracting and removing a specific component from a tobacco leaf material, a technique of removing a lipid component from tobacco using a mixed solvent of an aliphatic hydrocarbon and a lower alcohol is known (Japanese Patent Document 1).

Once the tobacco leaf material is subjected to an extraction operation, the technique of extracting the residue into the extract is carried out by extracting the tobacco raw material with a solution containing a surfactant, removing the surfactant and the polypeptide in the extract, and then adding the solution to the smoke. A method of raw materials is known (Japanese Patent Document 2).

Further, a method of treating a tobacco raw material using a supercritical fluid and removing nitrosamine from the extract obtained by the treatment, thereby reducing nitrosamine from the tobacco material is known (Japanese Patent Document 3).

Further, in another technique, the tobacco leaf material is immersed in carbon dioxide as a supercritical fluid under pressure and the pressure is reduced to atmospheric pressure, so that the flavor component contained in the tobacco leaf material is condensed on The technique of the surface of the tobacco leaf is known (Japanese Patent Document 4).

[Previous Technical Literature] [Japanese Patent Literature]

[Japanese Patent Document 1] Japanese Patent Publication No. Sho 58-4544

[Japanese Patent Document 2] Japanese Patent Publication No. 7-505521

[Japanese Patent Document 3] Japanese Patent No. 3913084

[Japanese Patent Document 4] Japanese Patent Laid-Open Publication No. Hei 8-23952

Tobacco material contains many components with different polarities, and its components are roughly divided into low polarity, high polarity and bipolar components. When such components are removed by extraction, for example, if extraction is carried out with a solvent of low polarity, the group of low polarity and bipolar components in the tobacco leaves can be removed.

On the other hand, when extracting with a solvent having a high polarity, a group of highly polar and bipolar components in the tobacco leaf material can be removed.

Therefore, one-time extraction with a solvent of low polarity or high polarity removes the component group of the two polarities in addition to the component of low polarity or high polarity. As a result, the influence on the flavor of the tobacco raw material is sometimes increased.

Moreover, after extracting, the technique of adding the extract to the raw material of the tobacco In the case where the extract obtained by one-time extraction contains a large number of components, when it is administered to the extract (contact with an antioxidant, etc.), it is considered that in addition to the component to be removed, the flavor is affected. The ingredients also change. Therefore, it is considered that the influence on the flavor is increased.

In view of the above, an object of the present invention is to provide a tobacco raw material having a good scent and a method of producing a tobacco raw material.

As a result of intensive research, the present inventors have found a tobacco raw material excellent in flavor and taste, which is obtained by extracting n-hexane as a solvent, and further extracting water by using water as a solvent. The weight ratio of the extract obtained by the extraction is 0 or more and 1.5 or less in terms of the weight ratio of the water extract/hexane extract.

Moreover, it is known that a manufacturing method can solve the above problems, and the method includes the following steps: a first extraction step of extracting a tobacco leaf material using a solvent having a dielectric constant of 1 or more and less than 25 to obtain an extract liquid and an extraction residue; An extraction step, after the first extraction step, extracting the extraction residue obtained in the first extraction step using a solvent having a dielectric constant of 25 or more to obtain an extraction residue; and extracting the residue obtained after the second extraction step In the middle, the step of extracting the extract obtained in the first extraction step as a raw material of tobacco leaves is carried out. The invention is finally completed.

That is, the present invention is as follows.

[1] A tobacco raw material which is a weight ratio of an extract obtained by extraction using n-hexane as a solvent, and a weight ratio of an extract obtained by extraction using water as a solvent after extraction, Water extract weight / The weight ratio of the hexane extract is 0 or more and 1.5 or less.

[2] The tobacco raw material according to [1], wherein the weight of the extract obtained by extraction using n-hexane as a solvent, and the extraction obtained by further extracting by using water as a solvent after extraction The total weight of the substance is 5 to 17% by weight based on the weight of the raw material of the smoke before extraction.

[3] A method for producing a tobacco raw material, comprising: a first extraction step of extracting a tobacco leaf material using a solvent having a dielectric constant of 1 or more and less than 25 to obtain an extract liquid and an extraction residue; a step of extracting the extraction residue obtained in the first extraction step using a solvent having a dielectric constant of 25 or more to obtain an extraction residue; and, in the extraction residue obtained by the second extraction step, after the first extraction step And returning the extract obtained in the first extraction step as a step of the tobacco leaf raw material.

[4] The production method according to [3], wherein the solvent used in the first extraction step is a solvent having a dielectric constant of 1 to 20, and the solvent used in the second extraction step is water.

[5] The production method according to [3] or [4], wherein the solvent used in the first extraction step is one or more selected from the group consisting of n-hexane, tetrahydrofuran, and ethanol.

[6] A tobacco raw material obtained by the production method according to any one of [3] to [5].

[7] A smoking article which is a smoking article using the tobacco raw material according to [1], [2] or [6].

In addition, the "tobacco material" used in the present specification is a tobacco leaf used to manufacture a user of "smoke raw material" after being subjected to an extraction step or the like. The term "smoke raw material" in this specification refers to the above "smoke material". The person obtained by the treatment of the extraction step or the like is added.

According to the present invention, it is possible to provide a tobacco material which is good in flavor and taste and a method for producing the same.

Fig. 1 is a view showing the results of the sensory evaluation of Example 3 and Comparative Example 2.

Fig. 2 is a graph showing the results of the sensory evaluation of Example 4 and Comparative Example 3.

Fig. 3 is a graph showing the results of the sensory evaluation of Example 5 and Comparative Example 4.

Fig. 4 is a view showing the results of the sensory evaluation of Example 6 and Comparative Example 1.

Fig. 5 is a graph showing the results of the sensory evaluation of Comparative Example 5 and Comparative Example 6.

Fig. 6 is a graph showing the results of the sensory evaluation of Comparative Example 7.

In the following, the present invention will be described in detail with reference to the accompanying drawings, and the embodiments of the present invention, and the present invention is not limited by the scope of the invention.

<Manufacturing Method of the Present Invention>

The method for producing a tobacco raw material of the present invention comprises the following steps: a first extraction step of extracting a tobacco leaf material using a solvent having a dielectric constant of 1 or more and less than 25 to obtain an extract liquid and a extraction residue; and a second extraction step; After the first extraction step, the extraction residue obtained in the first extraction step is extracted with a solvent having a dielectric constant of 25 or more to obtain an extraction residue; and the extraction residue obtained after the second extraction step is returned to the first The step of extracting the extract obtained as the raw material of the tobacco leaf.

In the method for producing a tobacco raw material of the present invention, the first extraction step includes a step of extracting the tobacco leaf material using a solvent having a dielectric constant of 1 or more and less than 25 to obtain an extract liquid and an extraction residue.

The type of the tobacco leaf material used in the present invention is not particularly limited, and examples thereof include the genus Nicotiana, the yellow species of tobacco smear, the Burley species, and the Brasilia species of Nicotiana rustica.

These tobacco leaf materials are cut to an appropriate size (having a particle diameter of about 0.425 to 1.18 mm) by a suitable means such as a pulverizer, and can be dried by a known method.

The tobacco leaf material subjected to the above treatment is extracted using a solvent having a dielectric constant of 1 or more and less than 25, whereby the desired flavor component contained in the tobacco leaf material can be extracted.

The solvent used in the first extraction step is more preferably one having a dielectric constant of 1 or more and 20 or less.

Examples of the solvent having a dielectric constant of 1 or more and less than 25 include ethanol, isopropanol, ethyl acetate, a linear or branched carbon number of 5 to 10, n-propanol, butanol, and benzene. Toluene, xylene, benzyl alcohol, acetone, tetrahydrofuran, diethyl ether, 1,4-dioxane, chloroform, dichloromethane.

The above-mentioned alkane may, for example, be pentane, n-hexane, cyclohexane, heptane, octane, decane or decane.

Among the above, for example, a state in which a low molecular organic acid ester of ethyl acetate is not used can be mentioned.

The solvent which can be preferably used among the above may, for example, be ethanol, n-hexane, heptane, diethyl ether or tetrahydrofuran.

The solvent having a dielectric constant of 1 or more and less than 25 may be used alone or in combination of plural kinds. When the solvent to be mixed is used, the dielectric ratio of the solvent to be mixed is 1 or more and less than 25.

The extraction system can be carried out at normal temperature and pressure, or can be heated to, for example, about 40 to 80 ° C and at 1000 to 2000 psi under pressure. Further, when the pressure is displayed in the SI unit system, the calculation is performed in a conversion formula of 1 psi ≒ 689.957.

The extraction time is not particularly limited, but may be, for example, 5 minutes to 1 hour.

The extraction system can be carried out once or several times. Further, the extraction was carried out using a high-speed solvent extraction apparatus to be described later.

In the first extraction step, the operation of separating the extract and extracting the residue may be appropriately set. For example, a method of pouring the extract into a filter paper or a sieve having a suitable pore diameter and separating it into an extract and a residue for extraction may be mentioned.

The resulting extraction residue is dried by a suitable method. The drying method can be, for example, freeze-drying.

The extraction residue obtained by the first extraction step described above is further subjected to an extraction operation using a solvent having a dielectric constant of 25 or more, and the components in the tobacco material not extracted in the first extraction step may be extracted.

The solvent used in the second extraction step having a dielectric constant of 25 or more is not particularly limited, and examples thereof include water, methanol, and a mixed solvent containing the same.

The extraction conditions of the second extraction step may be carried out at normal temperature and pressure in the same manner as in the first extraction step, or may be heated to about 40 to 80 ° C, and further extracted at 1000 to 2000 psi under pressure.

The extraction time is not particularly limited, but may be, for example, 5 minutes to 1 hour.

The extraction system can be one time or multiple times. The extraction system can also be carried out using a high-speed solvent extraction apparatus to be described later.

In the first extraction step and the second extraction step, the solvent used in the second extraction step has a higher dielectric constant than the solvent used in the first extraction step, whereby the second extraction step can be extracted in the first extraction step. An ingredient in the tobacco material that has not been extracted. The extract obtained in the second extraction step is not poured back into the extraction residue.

In the second extraction step, unnecessary components contained in the tobacco leaf material can be removed from the extraction residue obtained in the first extraction step.

The unnecessary components are, for example, highly polar components such as organic acids or ammonia containing a low molecular weight.

The manufacturing method of the present invention adopts the sequence of the first extraction step and the second extraction step, that is, the solvent used in the initial extraction is relatively low polarity, and the solvent used in the second extraction step is used in comparison with the first extraction step. For the solvent, it is important to use a solvent having a relatively high dielectric polarity. If the order is reversed, a tobacco material having a good scent is not obtained.

After the first extraction step is performed plural times, the second extraction step is performed plural times, and the first extraction step and the second extraction step may be repeated continuously, and then the first extraction step is performed, and the second extraction step is further performed. Extraction step.

The number of steps of the total of the first extraction step and the second extraction step is preferably from the viewpoint of simplification of the production step.

The manufacturing method of the present invention comprises: after the second extraction step, in the extraction residue obtained through the second extraction step, pouring The step of returning the extract obtained in the first extraction step as a raw material of tobacco leaves.

In this step, the extract obtained in the first extraction step is poured back to the extraction residue obtained in the second extraction step, whereby the components extracted in the first extraction step to make the tobacco raw material have good taste are returned to the tobacco raw material.

When the extract is poured back to the extraction residue, from the viewpoint of maintaining the uniformity of the quality of the tobacco raw material, it is preferred to uniformly distribute the extract to the extraction residue.

The extract obtained in the first extraction step can be directly poured back, or can be poured back to the solvent only. Further, a decanting treatment may be performed on the extract liquid system.

After the extract is poured back to the extraction residue, the solvent is removed by an appropriate method.

Thereby, the tobacco raw material of the present invention can be obtained.

The tobacco raw material obtained by the production method of the present invention may be used in a state of use at room temperature or in a state of being heated, for example, in any aspect of use. The taste is excellent.

The aspect to be used under normal temperature or heating conditions is, for example, a tube having a diameter of 0.7 mm and filled with the tobacco leaf treated as described above.

The aspect used in the state of being heated may be, for example, a state in which it is heated to, for example, about 40 to 70 ° C.

<The raw material of tobacco of the present invention>

The tobacco raw material of the present invention is an extract obtained by extraction using n-hexane as a solvent (hereinafter, also referred to as a hexane extract), and an extract obtained by extraction using water as a solvent after extraction. The ratio of the weight of the water extract (hereinafter referred to as water extract) is 0 or more and 1.5 or less in terms of the value of the water extract weight/hexane extract weight (also referred to as W/H ratio).

The tobacco raw material has a W/H ratio as described above, whereby it becomes a smoke raw material having a good scent. If the W/H ratio exceeds 1.5, that is, if the content of the water extract becomes too much, the flavor of the tobacco material will be mixed with the taste.

Further, the W/H ratio may be, for example, 0.3 or more and 0.6 or less.

Further, the total weight of the hexane extract and the water extract in the tobacco raw material of the present invention may be, for example, 5 to 17% by weight based on the weight of the raw material of the tobacco before extraction. Further, for example, it is 5 to 14% by weight.

In order to produce a tobacco raw material having a W/H ratio as described above, for example, a method for producing a tobacco raw material of the present invention described above can be used.

In addition, the following method is used for the measurement method of the amount of the extract obtained by the extraction using the hexane as a solvent and the amount of the extract obtained by the extraction using the water as a solvent. Specifically, a high-speed solvent extraction apparatus (DIONEX Co., Ltd., ASE 200) was used, and a volume of 22 ml was placed in a pressure-resistant metal extraction cell so that the raw material of the sample was 1.0 g/cell, and a cell filled with the sample was prepared. When the cell was provided on the aforementioned high-speed solvent extraction apparatus, extraction was carried out under the conditions shown in the following table.

In the above extraction, the extract is transferred to a glass vial for the device, but after the extraction, it is recovered and used for the measurement of the extraction amount (the method is as follows). Solvent extraction is filled with solvent, heated, allowed to stand, degassed (transfer the solvent to the vial), and the pressurized filling of the solvent is 1 cycle, and the case of n-hexane is repeated for 3 cycles, from 1 grid. The total amount of liquid obtained in the chamber was recovered into one vial. The water extraction which was carried out was repeated for 9 cycles in total, and the total liquid amount obtained from the 3 cycles was recovered to 1 vial, and a total of 3 vials were obtained from one cell.

The amount of n-hexane extract was measured by the following method.

Using n-hexane, ethyl acetate, and ethanol, 1 vial/1 compartment of the n-hexane extract was transferred to a pre-weighed 100 ml eggplant type beaker, further washed into a vial, and the entire extract was recovered into an eggplant type beaker. The eggplant type beaker was concentrated under reduced pressure on a rotary evaporator, and further dried under reduced pressure at a normal temperature and reduced pressure for 3 hours under reduced pressure. The concentrating system uses a rotary evaporator equipped with a collecting ball, and the liquid temperature of the water tank is set to 25 ° C or lower. The weight of the dried eggplant beaker was measured, and the difference was used as the amount of n-hexane extract.

The measurement of the amount of the water extract was carried out in the following manner.

The ultra-pure water was used to transfer the 3 vials/1 cell water extract to a pre-weighed 500 ml freeze-drying common matching eggplant beaker, further washed into the vial, and the entire extract was recovered to the eggplant beaker. The eggplant type beaker was frozen in a preliminary freezing tank of the freeze-drying apparatus, and then connected to a freeze-drying apparatus and dried. The weight of the dried eggplant beaker was measured, and the difference was taken as the water extract.

[Examples]

The present invention will be more specifically described by the examples, but the present invention is not limited by the description of the examples below.

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited by the description of the examples below.

<Example 1>

The tobacco leaf material (made by domestic Barley species) was pulverized by a pulverizer.

The pulverizer was a sample grinder SK-M10 manufactured by Kyoritsu Seiko Co., Ltd.

Then, through the screen, a pulverized tobacco material having a particle diameter of 0.425 mm to 1.18 mm can be obtained. The 2 g of the pulverized tobacco leaf material was accurately weighed and filled in a metal cell.

The voids generated during filling are filled with beads made of stainless steel. The cell system used a 22 mL extraction cell made of DIONEX (shares), and the beads used a central scientific trade size of 2.2 mm. Because the cell is fed with solvent, The pulverized tobacco leaf material is extracted, so a high speed solvent extraction machine is used.

The extractor was a high-speed solvent extraction apparatus ASE-200 manufactured by DIONEX.

The extraction system used a solvent having a dielectric constant of 1 or more and a ratio of not more than 25 in n-hexane (dielectric ratio: 2) and ethanol (dielectric ratio: 24).

The extraction system of the above extraction machine using these solvents is first filled with a solvent in a cell, and after standing, it is allowed to stand, and the solvent in the cell chamber is repeated three times in this order. Further, the temperature at the time of heating and the pressure conditions at the time of standing are as follows.

Hexane: 70 ° C, 2000 psi

Ethanol: 80 ° C, 2000 psi

The extract obtained by the above solvent was about 40 mL, but it was concentrated using an evaporator, and dissolved in a suspension in the same solvent as the solvent used for the extraction to 6.25 mL. Extraction was then carried out with water of a solvent (dielectric ratio: 80). At the time of extraction, the same procedure as the extraction of a solvent having a dielectric constant of 1 or more and less than 25 is adopted, but the temperature at the time of heating and the pressure condition at the time of standing are 100 ° C, 2000 psi, and the dielectric ratio is When the extraction of the solvent of 1 or more and less than 25 is carried out for 3 cycles, the extraction by water is changed to 9 cycles. The amount of the extract is approximately 120 mL.

The extraction residue remaining in the cells after the extraction is recovered without residue, and after preliminary freezing, it is supplied to freeze-drying. The pre-freeze and freeze-drying system uses FREEZE DRYER FD-81 made by EYELA.

The tobacco raw material of the present invention can be obtained by pouring the entire amount of the extract produced by the above-described low-polarity solvent to the extracted residue after drying without agglomeration.

The solvents used in the respective examples are as follows.

Example using n-hexane: Example 1

Example of using ethanol: Example 2

Further, as an example of the comparative example 1, a tobacco raw material obtained by using methanol (dielectric ratio: 33) as a solvent in the first extraction step was used.

For the tobacco materials of Examples 1, 2 and Comparative Example 1, the content of ammonia was measured. The determination of the content of ammonia in the raw material of the tobacco is carried out in the following order.

<Ammonia analysis>

The untreated raw material (180 mg) or the treated raw material (the weight at which 180 mg of the untreated raw material was treated) was soaked in 5 mL of pure water for 30 minutes. Thereafter, the extract was filtered through a 10 KDa limit filter membrane. The filtrate was analyzed by a capillary electrophoresis chromatography analyzer manufactured by Agilent Technologies. The absorbance was set to a wavelength of 280 nm, and ammonia was diluted with an aqueous solution of ammonium chloride to a standard solution of an appropriate concentration to quantify ammonium ions.

The results of the quantified values converted to the weight per raw material are shown in Table 2. Further, the raw material to be treated was converted into the weight of the raw material at the time of untreated. (Except for the effect of the difference in weight reduction caused by the treatment.)

From the results of the above Table 2, it is understood that the first extraction step uses a solvent having a dielectric constant of 1 or more and less than 25, and after the second extraction step, the extract obtained in the first extraction step is poured back into the extraction residue. In the case where a solvent having a dielectric constant of 25 or more is used as compared with the first extraction step, a large amount of ammonia is selectively removed.

<Functional evaluation>

The raw material of the tobacco obtained by the production method of the present invention was produced under the same conditions as in Example 1 (Example 3), and in Example 1, only the extract obtained by the first extraction step was poured back. The operation was carried out (without the second extraction step). In Comparative Example 2, Example 4 obtained by performing the same operation except that the yellow species produced in Brazil was used as the tobacco leaf material in Example 1 was only poured in Example 4. Back to the operation of the extract obtained by the first extraction step (without the second extraction step), Comparative Example 3, the same tobacco material as in Example 3, and Example 5 obtained by operation, and comparison with In the same tobacco material of Example 2 and Comparative Example 4 obtained by the operation, the following functional evaluation was carried out. During the period of functional evaluation, the following operations were performed.

(Examples 3 and 4 and Comparative Examples 2 and 3)

The untreated material (particle diameter 0.425 mm to 1.18 mm) and each of the tobacco materials (Examples 3, 4, Comparative Examples 2, and 3) which were pulverized and sieved were filled into a quartz tube (outer diameter 9 mm × inner diameter 7 mm × length 55 mm) ).

The filling amount is 180 mg when there is no untreated raw material and the extract is removed. When the raw material containing the extract is removed in the step, the weight reduction of the non-returned water extract is considered to be 109 mg (when processing 180 mg of the raw material) The weight of the raw material obtained). The ends of the quartz tube are sealed with a stainless steel mesh to avoid splashing of the sample accompanying the evaluation of the suction. For these quartz tubes, heat to 60 ° C, suction from one end of the quartz tube, and investigate the results compared with the untreated raw materials.

<Method of Functional Evaluation>

The basis for the functional evaluation (change in sensation of sensation) is as follows. The change ratio is judged by the 7-stage evaluation expressed by the following text in comparison with the untreated raw material. In addition, the number of subjects examined was 10 in all evaluations. The evaluation results were judged by the least significant difference method (LSD) to judge the significance of the difference in the results of the functional evaluation by the treatment method. The results are shown in Figures 1 and 2.

(1) Very strong: +3

(2) Strong: +2

(3) Slightly strong: +1

(4) unchanged: ±0

(5) slightly weaker: -1

(6) Weak: -2

(7) Very weak: -3

From the results of Figs. 1 and 2, it can be seen that the test with the least significant difference method is 95% meaningful difference between the examples and the comparative examples, and the effect produced by the manufacturing method of the present invention can be seen.

From this, it can be seen that the difference in the variety of the domestically produced Barley species and the tobacco leaf material produced in Brazil is excellent in the flavor of the tobacco material obtained by the production method of the present invention.

(Example 5 and Comparative Example 4)

The untreated raw materials (particle diameter: 0.425 mm to 1.18 mm) and each of the tobacco materials (Examples 5 and 4) which were pulverized and sieved were filled in a plastic tube (outer diameter 9 mm × inner diameter 7 mm × length 110 mm).

The filling amount is 360 mg when there is no untreated raw material and the removal of the extract, and when the processing raw material including the removal of the extract is included in the step, the weight reduction of the non-returned water extract is considered to be 218 mg (when processing 360 mg of the raw material) The weight of the raw material obtained). Both ends of the quartz tube are sealed with a non-woven net to avoid splashing of the sample accompanying the evaluation of suction. The plastic tube was suctioned from one end of the plastic tube at room temperature to investigate the results compared with the untreated material. The results are shown in Figure 3.

Similarly to Examples 3 and 4 and Comparative Examples 2 and 3, Example 5 and Comparative Example 4 were also evaluated. As a result, the test was carried out by the least significant difference method, and 95% of the difference between Example 5 and Comparative Example 4 was significant, and the effect produced by the production method of the present invention can be seen.

<Example 6>

In the first extraction step, the extraction solvent was used, and the tobacco was produced in the same order as in Example 1 except that tetrahydrofuran (dielectric ratio: 8) was used. material.

The tobacco raw material of Example 6 (104.94 mg) and the raw material of the tobacco produced in Comparative Example 1 (the first extraction step used in the extraction solvent, methanol was used) (134.55 mg), and Examples 3, 4 and Comparative Examples 2, 3 The same method for functional evaluation (change in sorption).

The results are shown in Figure 4.

<Comparative Examples 5 and 6>

In the same manner as in Example 1, the tobacco leaf material of the domestic Barley species was pulverized, and the first extraction step was not carried out, but only the second extraction step (extraction with water only) was carried out, and the extract obtained by the second extraction step was poured. The residue was extracted back to prepare a tobacco raw material of Comparative Example 5.

Further, the tobacco leaf material of the domestic Barley species was pulverized and treated in the same manner as in Example 1, and the second extraction step (extraction with water) was first performed, and then, the first extraction step (extraction with n-hexane) was carried out, and only water was allowed to proceed. The extract obtained by the extraction was poured back to the extraction residue to prepare a tobacco raw material of Comparative Example 6.

For the tobacco materials of Comparative Examples 5 and 6, the sensory evaluation (change in sorption) was carried out in the same manner as above. The weight of the tobacco raw material of Comparative Example 5 used for the sensory evaluation was 180 mg, and the weight of the tobacco raw material of Comparative Example 6 was 172.9 mg.

The results are shown in Figure 5.

<Comparative Example 7>

The pulverization treatment of the tobacco material of the domestic Barley species is carried out in the same manner as in the first embodiment, and the second extraction step is first performed (extraction with water first), followed by the first extraction step (subsequent extraction with n-hexane), Obtained The extract (only the extract of n-hexane) was poured back to the residue to prepare a tobacco material of Comparative Example 7.

For the tobacco material of Comparative Example 7, the sensory evaluation (change in sorption) was carried out in the same manner as in Examples 3 and 4 and Comparative Examples 2 and 3. The weight of the tobacco raw material of Comparative Example 7 used for the sensory evaluation was 83.86 g.

The results are shown in Figure 6.

<W/H ratio of each tobacco raw material>

Measurement Example 1 (using n-hexane in the first extraction step), Example 2 (using ethanol in the first extraction step), and Example 6 (using tetrahydrofuran in the first step), Comparative Example 1 (in the first The step uses the W/H ratio of each of the tobacco raw materials. Further, as for the reference, the W/H ratio was measured for the untreated tobacco material (Barley species) as a reference example.

The measurement method is as described above.

The filling of the sample used for the extraction is carried out in the following order.

The pure filter paper was placed in a pressure-resistant metal extraction cell, and 10 g of pre-washed and weighed stainless steel balls were filled. Then, for each of the tobacco materials of Examples 1, 2, 6, and Comparative Example 1 and the reference examples, the above-mentioned dish scale was weighed 1.0 g/cell on the medicine wrap, and a suitable aid such as a powder funnel was used, and the pre-insertion was carried out. The filter paper and the stainless steel ball were placed in the prepared 22 ml cell, the sample was weighed, and the sample remaining on the drug wrap was wiped several times with a stainless steel ball and added to the cell. Further, the gap is filled with a stainless steel ball until the upper portion of the cell is filled. After filling, the upper part of the cell is sealed, tapped on the table to fill the gap to make it uniform, and then the stainless steel ball is inserted into the space.

Next, under the conditions shown in Table 1, hexane and water (MilliQ water) will be used. The extraction was carried out for 3 cycles and 9 cycles, respectively, and the weight of the extract extracted by the respective solvent was determined. The measurement system was performed twice for each of the tobacco materials, and the weight of the extract was expressed as an average value.

The ratio of the W/H ratio and the weight of the extract to the smoke raw material before the extraction treatment was determined from the weight of the obtained extract. The results are shown in Table 3.

The devices, solvents, and articles actually used are as follows.

<Usage device>

High-speed solvent extraction device (DIONEX, ASE200)

Dish scales (METTLER, PM2500)

Freeze drying device with preparatory freezing tank (Tokyo Science Machinery Co., Ltd.. FD-81)

Decompression oil seal pump (ULVAC KIKO Inc., ULVAC GCD-051X)

<Use solvent>

Hexane (Wako Pure Chemical Industries Co., Ltd., High Speed Liquid Chromatography (HPLC))

Water (MilliQ water, day from MQ Gradient, ultra pure water manufacturing equipment) Ben Millipore (share))

Ethyl acetate (Wako Pure Chemical Industries, Ltd., high-speed liquid chromatography (HPLC))

Ethanol (Wako Pure Chemical Industries Co., Ltd., High Speed Liquid Chromatography (HPLC))

*Ethyl acetate and ethanol are used to transfer the extract from n-hexane to the eggplant beaker.

<Use items>

Medicine wrap 10 cm × 10 cm

Common match eggplant beaker / 100ml (Shibata Science Co., Ltd.)

Freeze-drying common matching eggplant beaker / 500ml (EYELA)

Pressure-resistant metal extraction cell 22mL (DIONEX Co., Ltd.)

Pure filter paper for extraction chamber (DIONEX Co., Ltd.)

Stainless steel ball size 2.3mm (Central Science Trade (share))

The scope of the patent application in this case is a kind of tobacco raw material and its manufacturing method, and the drawing of the present case is the functional evaluation result of the embodiment and the comparative example, which is not enough to represent the technical features of the present invention.

Claims (7)

A tobacco raw material which is a weight ratio of an extract obtained by extraction using n-hexane as a solvent, and a weight ratio of an extract obtained by extraction using water as a solvent after extraction, and an aqueous extract The weight/hexane extract weight ratio is 0 or more and 1.5 or less. The tobacco raw material according to claim 1, wherein the weight of the extract obtained by extraction using n-hexane as a solvent, and the extract obtained by further extracting by using water as a solvent after extraction The total weight is 5 to 17% by weight based on the weight of the raw material of the tobacco before extraction. A method for producing a tobacco raw material, comprising: a first extraction step of extracting a tobacco leaf material using a solvent having a dielectric constant of 1 or more and less than 25 to obtain an extract liquid and a extraction residue; and a second extraction step After the first extraction step, the extraction residue obtained in the first extraction step is extracted with a solvent having a dielectric constant of 25 or more to obtain an extraction residue; and the extraction residue obtained after the second extraction step is returned to the first The step of extracting the extract obtained as the raw material of the tobacco leaf. The manufacturing method according to claim 3, wherein the solvent used in the first extraction step is a solvent having a dielectric constant of 1 to 20, and the solvent used in the second extraction step is water. The production method according to the third or fourth aspect of the invention, wherein the solvent used in the first extraction step is one or more selected from the group consisting of n-hexane, tetrahydrofuran and ethanol. a raw material for tobacco, which is exemplified by items 3 to 5 of the scope of the patent application The one obtained by the manufacturing method described. A smoking article which uses the tobacco material as described in claim 1, item 2 or item 6.