WO2023119516A1

WO2023119516A1 - Production method for tobacco flavored liquid, tobacco flavored liquid, reconstituted tobacco material, and tobacco product

Info

Publication number: WO2023119516A1
Application number: PCT/JP2021/047672
Authority: WO
Inventors: 研児伊藤
Original assignee: 日本たばこ産業株式会社
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-06-29

Abstract

A production method for a tobacco flavored liquid, wherein an acidic tobacco extract having a pH of 4.1 or lower is treated with a reverse-phase adsorbent to eliminate colored components from the acidic tobacco extract.

Description

Method for producing tobacco flavoring liquid, tobacco flavoring liquid, reconstituted tobacco material, and tobacco product

The present invention relates to a method for producing a tobacco flavor liquid, a tobacco flavor liquid, a reconstituted tobacco material, and a tobacco product.

It has been reported that water-soluble components are extracted from tobacco materials such as leaf tobacco, and the resulting tobacco extract is used as a flavor source for tobacco products. For example, the tobacco extract is incorporated into a heated or non-heated flavor inhaler and atomized at the time of use, or the tobacco extract is impregnated into a carrier such as tobacco residue or fiber to obtain regenerated tobacco. The material has been reported to be used as a flavor source for cigarettes, buccal tobacco, and flavor inhalers (Patent Documents 1 and 2).

When tobacco extract is used as a flavor source in its liquid form, the user may see the tobacco extract when replacing the cartridge containing the tobacco extract or when refilling the tobacco extract. In this case, the color of the tobacco extract is preferably close to colorless in terms of appearance. When the carrier is impregnated with the tobacco extract, the color of the tobacco extract is desirably nearly colorless in order to make the best use of the color characteristics of the carrier.

Japanese special table 2019-513353 U.S. Pat. No. 4,895,175

An object of the present invention is to provide a technique for removing colored components from a tobacco extract while maintaining tobacco flavor components contained in the tobacco extract.

According to one aspect, there is provided a method for producing a tobacco flavor liquid, comprising treating an acidic tobacco extract having a pH of 4.1 or less with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract. provided.
According to another aspect, there is provided a tobacco flavoring liquid obtainable by the aforementioned method.
According to yet another aspect, there is provided a tobacco product comprising a tobacco flavoring liquid as described above.

According to yet another aspect,
Obtaining a tobacco extract by extracting a water-soluble component contained in the tobacco material from the tobacco material with an aqueous solvent, and adjusting the pH of the tobacco extract to 4.1 or less to obtain an acidic tobacco extract. and treating the acidic tobacco extract with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract;
and tobacco residue obtained when the tobacco extract is obtained.
According to yet another aspect, there is provided a tobacco product comprising reconstituted tobacco material as described above.

According to the present invention, there is provided a technique for removing colored components from a tobacco extract while maintaining tobacco flavor components contained in the tobacco extract.

FIG. 1 is a flow chart showing an example of a method for producing a tobacco flavoring liquid. FIG. 2 is a diagram showing an example of a flavor inhaler. FIG. 3 is a perspective view showing an example of the appearance of the unit of the flavor inhaler shown in FIG. 2, excluding the sensor, control section, and power supply. 4 is a longitudinal sectional view of the unit shown in FIG. 3. FIG. 5 is an exploded perspective view of the unit shown in FIG. 3. FIG. FIG. 6 is an exploded perspective view of the atomization unit with the first cover and the second cover removed. FIG. 7 is a cross-sectional view of the atomization unit. FIG. 8 is a graph showing the results of color analysis of tobacco flavor liquid. FIG. 9 is a graph showing the relationship between the pH of the acidic tobacco extract and the nicotine content in the tobacco flavor liquid. FIG. 10 is a graph showing the relationship between the ethanol concentration in the acidic tobacco extract and the benzaldehyde content in the tobacco flavor liquid.

Although the present invention will be described in detail below, the following description is for the purpose of describing the present invention and is not intended to limit the present invention.

<1. Method for producing tobacco flavor liquid>
The present inventors have found that when the pH of the tobacco extract is adjusted to 4.1 or less and the obtained acidic tobacco extract is treated with a reversed-phase adsorbent, while maintaining the tobacco flavor components contained in the tobacco extract, The inventors have found that the colored components can be removed from the tobacco extract, leading to the completion of the present invention.

That is, according to one embodiment, a method for producing a tobacco flavor liquid comprises treating an acidic tobacco extract having a pH of 4.1 or less with a reversed-phase adsorbent to remove colored components from the acidic tobacco extract. include. According to a preferred embodiment, the method for producing a tobacco flavor liquid further comprises preparing an acidic tobacco extract having a pH of 4.1 or less prior to the treatment with the reversed-phase adsorbent, The preparation includes extracting water-soluble components contained in the tobacco material from the tobacco material with an aqueous solvent to obtain a tobacco extract, and adjusting the pH of the tobacco extract to 4.1 or less.

That is, according to a preferred embodiment, the method for producing a tobacco flavor liquid comprises:
obtaining a tobacco extract by extracting a water-soluble component contained in the tobacco material from the tobacco material with an aqueous solvent;
obtaining an acidic tobacco extract by adjusting the pH of the tobacco extract to 4.1 or less;
and treating the acidic tobacco extract with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract.

A method according to a preferred embodiment is shown in FIG.

In this specification, the liquid obtained by extracting the water-soluble component from the tobacco material is referred to as "tobacco extract", and the liquid obtained by adjusting the pH of the tobacco extract to 4.1 or less is referred to as "acid tobacco The liquid obtained by treating the acidic tobacco extract with the reversed-phase adsorbent is called the "tobacco flavor liquid".

Hereinafter, the method according to the preferred embodiment will be described in the order of "extraction step (S1)", "pH adjustment step (S2)", and "treatment step with reversed-phase adsorbent (S3)".

[Extraction step (S1)]
In the extraction step (S1), water-soluble components contained in the tobacco material are extracted from the tobacco material with an aqueous solvent to obtain a tobacco extract. In the extraction step (S1), tobacco residue is obtained at the same time as tobacco extract is obtained (see FIG. 1).

As the tobacco material, cut tobacco ready to be blended into tobacco products such as combustion type or heating type flavor inhalers can be used. "Shredded tobacco ready to be incorporated into tobacco products" means a drying process at a farm, followed by a long-term aging process of one to several years at a raw material plant, and then blending and chopping at a manufacturing plant. It refers to shredded tobacco that is ready to be blended into tobacco products after undergoing various processing such as

"Tobacco cuts are cut tobacco leaves." Tobacco shredded includes deboned leaves, shredded ribs, and reconstituted tobacco (i.e., tobacco processed into a reusable form from leaf scraps, shredded scraps, shredded ribs, fine powder, etc. generated in the factory work process. material), or a mixture thereof. Tobacco shreds may be pulverized in order to increase extraction efficiency, and the resulting pulverized material may be used for extraction.

Any variety of shredded tobacco can be used, for example, yellow variety, burley variety, orient variety can be used. A single variety of shredded tobacco may be used, or a mixture of different varieties may be used.

As the aqueous solvent, water or an ethanol aqueous solution with a concentration of 10% by mass or less can be used. The aqueous solvent is generally water, preferably water at room temperature (eg, about 20°C) to 70°C. Aqueous solvents can be used, for example, in an amount of 500-5000% by weight relative to the tobacco material.

Extraction is carried out, for example, by immersing the tobacco material in warm water of 40-60°C for 30-180 minutes, or by shaking the tobacco material in warm water of 40-60°C for 30-180 minutes (eg, 200 rpm). be able to.

Also, the extraction may be performed by repeating the extraction operation multiple times. Specifically, the water-soluble components contained in the tobacco material are extracted from the tobacco material with an aqueous solvent, and then the obtained tobacco residue is put into a new aqueous solvent and subjected to a second extraction operation. The extraction may be carried out by repeating the extraction procedure with a new aqueous solvent.

A mixture of tobacco residue and tobacco extract is obtained by extraction. The tobacco extract contains water-soluble components contained in the tobacco material. Examples of "water-soluble components contained in tobacco materials" include components that contribute to tobacco flavor (eg, organic acids, foliar resins, terpenoids, and polyphenols).

After extraction, the tobacco residue and the tobacco extract are separated, and the tobacco extract is used as a raw material to obtain the tobacco flavor liquid. On the other hand, the tobacco residue can be mixed with the finally obtained tobacco flavor liquid, and the resulting mixture can be appropriately processed to produce a tobacco filler (hereinafter also referred to as regenerated tobacco material). can. For example, the tobacco residue may be mixed with the finally obtained tobacco flavoring liquid, and the resulting mixture may be used to produce tobacco moldings such as sheet tobacco. Alternatively, the tobacco residue may be mixed with the tobacco flavoring liquid finally obtained and the resulting mixture dried and ground for use in making tobacco powder.

[pH adjustment step (S2)]
In the pH adjustment step (S2), the pH of the tobacco extract obtained in the extraction step (S1) is adjusted to 4.1 or less to obtain an acidic tobacco extract (see FIG. 1).

In the pH adjustment step (S2), the pH of the tobacco extract is preferably adjusted within the range of 1-4.1, more preferably within the range of 2-3. The pH can be adjusted by adding to the tobacco extract a pH adjuster for lowering the pH of the tobacco extract in an amount necessary to reach a desired pH. As a pH adjuster, for example, weak acids such as phosphoric acid, citric acid and acetic acid may be used, and strong acids such as nitric acid, hydrochloric acid and sulfuric acid may be used.

As used herein, the pH is a value measured with a pH meter using a glass electrode according to the pH measurement method described in JIS Z 8802:2011, that is, using two electrodes, a glass electrode and a reference electrode, It refers to the value obtained by measuring the potential difference generated between these two electrodes. A commercially available pH meter based on the glass electrode method, such as LAQUA F-72 (HORIBA), can be used as the pH meter. The pH measurement can be performed, for example, on the tobacco extract at 20°C. In addition, when the measured value of pH is obtained to the second decimal place or less, the value obtained by rounding off the second decimal place or less can be regarded as the pH value.

The acidic tobacco extract may be prepared to contain ethanol at a concentration of 10% by mass or less. Preferably, the acidic tobacco extract may be prepared to contain ethanol at a concentration of 1-10% by mass. That is, the acidic tobacco extract is prepared by adjusting the tobacco extract obtained in the extraction step (S1) or the pH to 4.1 or less so that the final concentration is 10% by mass or less (preferably 1 to 10% by mass). It may further comprise adding ethanol to the tobacco extract.

When the acidic tobacco extract contains ethanol at a concentration of 10% by mass or less, the tobacco flavor liquid obtained as the final product exhibits a colorless or nearly colorless color while containing a greater amount of tobacco flavor components. (see Example 4 below).

[Treatment step (S3) with reversed-phase adsorbent]
In the treatment step (S3), the acidic tobacco extract is treated with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract. A tobacco flavor liquid is thus obtained (see FIG. 1).

Any adsorbent used in reversed-phase solid-phase extraction can be used as the reversed-phase adsorbent. "Reverse-phase solid-phase extraction" is a process in which a polar solution or suspension (mobile phase) is passed over a non-polar solid (stationary phase), and hydrophobic components contained in the mobile phase are adsorbed onto the stationary phase. Refers to the method of separation.

Examples of reversed-phase adsorbents include adsorbents in which hydrophobic groups such as octadecylsilyl groups (ODS) are bonded to silica gel carrier particles, and adsorbents composed of hydrophobic polymer particles such as styrenedivinylbenzene copolymers. be done. Reversed phase adsorbents are commercially available, for example, InterSep C18 (GL Sciences Co., Ltd.) solid phase extraction cartridges, Oasis HLB (Nippon Waters Co., Ltd.) solid phase extraction cartridges, and Diaion HP series (Mitsubishi Chemical Co., Ltd.) ), Amberlite XAD series (Organo Corporation) and other synthetic adsorbents. The reversed-phase adsorbent is not limited to those exemplified, and known adsorbents having the same separation mode as those exemplified can be used.

The treatment step (S3) may be performed by passing the acidic tobacco extract through a solid phase comprising a reversed-phase adsorbent, or by adding particles of the reversed-phase adsorbent to the acidic tobacco extract, followed by reverse This may be done by removing particles of the phase adsorbent from the acidic tobacco extract, such as by filtration.

In a preferred embodiment, the treatment step (S3) can be performed by passing the acidic tobacco extract through a solid phase comprising a reversed-phase adsorbent. In a more preferred embodiment, the treatment step (S3) can be performed by passing the acidic tobacco extract through a column filled with a reversed-phase adsorbent. A "reversed-phase sorbent" may generally consist of a collection of particles of a reversed-phase sorbent.

When the treatment step (S3) is performed, the colored components and tobacco-specific nitrosamines (TSNAs) can be removed from the tobacco extract without damaging the tobacco flavor components contained in the tobacco extract (Examples 1 to 3 described below). 3). For example, when the acidic tobacco extract is passed through a column packed with a reversed-phase adsorbent, the colored components and tobacco-specific nitrosamines (TSNAs) contained in the tobacco extract can be adsorbed on the column, and the tobacco extract is The tobacco flavor component contained in can be eluted in the eluate.

Tobacco-specific nitrosamines (TSNAs) are nitrosamines that are specifically present in tobacco fillers such as leaf tobacco and in cigarette smoke. It refers to four components: butanone (NNK), N'-nitrosonornicotine (NNN), N'-nitrosoanatabine (NAT), and N'-nitrosoanabasine (NAB).

[effect]
According to the method described above, it is possible to remove colored components and tobacco-specific nitrosamines (TSNAs) from the tobacco extract while maintaining tobacco flavor components contained in the tobacco extract. Thus, the above-described method has a colorless or near-colorless color (i.e., the color desired by users when incorporated into a tobacco product) and contains a sufficient amount of tobacco flavoring component, but a reduced amount. of tobacco-specific nitrosamines (TSNAs) can be produced.

<2. Tobacco flavor liquid>
According to another aspect, there is provided a tobacco flavoring liquid obtained by the above-described "method for producing a tobacco flavoring liquid".

As described above, the tobacco flavor liquid is colorless or nearly colorless and contains a sufficient amount of tobacco flavor components, but a reduced amount of tobacco-specific nitrosamines (TSNAs). Accordingly, when such liquid tobacco flavorings are incorporated into tobacco products, they provide the user with a desirable appearance during replacement or refilling of the liquid tobacco flavoring, and, in use, a sufficient amount of tobacco flavoring components and a reduced amount of tobacco-specific A therapeutic nitrosamine (TSNA) can be provided to the user.

In particular, in the above-mentioned "method for producing a tobacco flavoring liquid", when the acidic tobacco extract is prepared to contain ethanol at a concentration of 10% by mass or less, the tobacco flavoring liquid obtained as the final product has a larger amount. of tobacco flavoring ingredients.

The liquid tobacco flavor obtained by the above-mentioned "method for producing a liquid tobacco flavor" can be incorporated into tobacco products such as flavor inhalers according to known techniques. An example of using the tobacco flavoring liquid will be described below.

For example, the tobacco flavor liquid can be used as a tobacco flavor source for the flavor inhaler by incorporating it as a liquid into a liquid atomization type flavor inhaler and atomizing it at the time of use.

Alternatively, the tobacco flavor liquid can be added to tobacco materials (for example, deboned leaves and leaf tobacco), the resulting mixture can be dried, and the resulting dried product can be used as a tobacco flavor source for tobacco products.

Alternatively, the tobacco flavor liquid is added to the tobacco residue obtained in the extraction step (S1) described above, and the obtained mixture is used to prepare tobacco moldings such as sheet tobacco and tobacco granules, and the tobacco moldings are used as tobacco products. can be used as a tobacco flavor source.

Alternatively, the tobacco flavor liquid is added to the tobacco residue obtained in the extraction step (S1) described above, the resulting mixture is dried and pulverized to prepare tobacco powder, and the tobacco powder is used as a tobacco material (for example, deboned tobacco). leaves or leaf tobacco) and the resulting mixture can be used as a tobacco flavor source for tobacco products.

Alternatively, the tobacco flavor liquid is added to the tobacco residue obtained in the extraction step (S1) described above, the resulting mixture is dried and pulverized to prepare tobacco powder, and the tobacco powder is suspended in water to obtain a tobacco slurry. is prepared, the tobacco slurry is added to a tobacco material (eg, deboned leaf or leaf tobacco), and the resulting mixture is used as a tobacco flavor source for tobacco products.

Alternatively, the tobacco flavor liquid can be used as a tobacco flavor source for tobacco products by encapsulating it according to a known technique, incorporating the resulting flavor capsule into the filter portion of the tobacco product, and breaking the flavor capsule during use.

<3. Recycled Tobacco Material>
As described above, the tobacco flavor liquid may be used in combination with the tobacco residue obtained in the extraction step (S1) described above. Therefore, according to another aspect,
a tobacco flavoring liquid obtained by the above-described "method for producing a tobacco flavoring liquid";
and the tobacco residue obtained when the tobacco extract is obtained in the above-mentioned "method for producing a tobacco flavoring liquid".

in particular,
Obtaining a tobacco extract by extracting a water-soluble component contained in the tobacco material from the tobacco material with an aqueous solvent, and adjusting the pH of the tobacco extract to 4.1 or less to obtain an acidic tobacco extract. , treating the acidic tobacco extract with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract;
Tobacco residue obtained in obtaining the tobacco extract is provided.

Specific examples of the regenerated tobacco material are described below.
For example, the reconstituted tobacco material may be a product obtained by drying a mixture of tobacco flavor liquid and tobacco residue obtained in the extraction step (S1). This product can be used as a tobacco flavor source in tobacco products.

Alternatively, the reconstituted tobacco material is a tobacco molded product obtained by molding a mixture of the tobacco flavor liquid and the tobacco residue obtained in the extraction step (S1) into a specific shape such as a sheet shape or a granule shape. may The tobacco molded body can be used as a tobacco flavor source for tobacco products.

Alternatively, the regenerated tobacco material may be tobacco powder obtained by drying and pulverizing a mixture of tobacco flavor liquid and tobacco residue obtained in the extraction step (S1). Tobacco powder can be added to tobacco materials (eg, deboned leaves and leaf tobacco) to enhance the flavor of the tobacco materials. The flavor-enhanced tobacco material can be used as a tobacco flavor source in tobacco products.

Alternatively, the reconstituted tobacco material is obtained by drying a mixture of the tobacco flavor liquid and the tobacco residue obtained in the extraction step (S1), pulverizing it into powder, and suspending the obtained powder in water. It may be a tobacco slurry. Tobacco slurry can be added to tobacco materials (for example, deboned leaves and leaf tobacco) to enhance the flavor of the tobacco materials. The flavor-enhanced tobacco material can be used as a tobacco flavor source in tobacco products.

The reconstituted tobacco material may contain additives such as binders, pH adjusters, preservatives, and antioxidants as necessary.

<4. Tobacco products>
The aforementioned "tobacco flavoring liquid" or the aforementioned "reconstituted tobacco material" can be incorporated into any tobacco product. Thus, according to another aspect, there is provided a tobacco product comprising the above-described "tobacco flavor liquid" or the above-described "reconstituted tobacco material". Tobacco products include combustion flavor inhalers, heated flavor inhalers, unheated flavor inhalers, and smokeless tobacco.

A "combustion type flavor inhaler" is a flavor inhaler that provides tobacco flavor to the user by burning a tobacco filler (such as cut tobacco or molded tobacco). Examples of burning flavor inhalers include cigarettes, pipes, pipes, cigars, or cigarillos.

A “heated flavor inhaler” is a flavor inhaler that provides tobacco flavor to a user by heating tobacco flavor sources such as tobacco fillers and tobacco flavor liquids without burning them. As an example of a heating type flavor inhaler,
a carbon heat source flavor inhaler that heats the tobacco filler with the heat of combustion of the carbon heat source (see e.g. WO2006/073065);
An electrically heated flavor inhaler comprising a tobacco stick containing tobacco filler and a heating device for electrically heating the tobacco stick (see e.g. WO2010/110226); and sucks the flavor derived from the tobacco filler together with the aerosol (see, for example, WO2015/046385)
etc.

A "non-heating flavor inhaler" is a flavor inhaler that provides tobacco flavor to a user without burning or heating a tobacco flavor source such as tobacco filler or tobacco flavor liquid. As an example of a non-heating flavor inhaler,
A non-heated tobacco flavor inhaler (see, for example, WO2012/023515) comprising an inhaler body with an airflow passage for distributing air upon inhalation, and tobacco flavor release granules disposed within the airflow passage; or tobacco. A liquid atomization type flavor inhaler comprising a flavor liquid and an atomization unit that atomizes the tobacco flavor liquid using surface acoustic waves (see, for example, WO2017/167521)
is mentioned.

"Smokeless tobacco" is a product that allows the user to enjoy the tobacco flavor by putting the product directly into the nasal cavity or oral cavity. The former are called nasal tobacco products and the latter are called oral tobacco products. An example of the former is snuff and an example of the latter is chewing tobacco.

(Typical examples of tobacco products)
According to a representative example, the above-mentioned "tobacco flavor liquid" can be incorporated into a liquid atomization type flavor inhaler that atomizes the tobacco flavor liquid using surface acoustic waves. That is, according to a representative example, there is provided a flavor inhaler comprising the above-described "tobacco flavor liquid" and an atomization unit that atomizes the tobacco flavor liquid using surface acoustic waves. In this liquid atomization type flavor inhaler, the atomization unit can include, for example, a piezoelectric body and two or more electrodes for applying voltage to the piezoelectric body. Here, the electrodes are preferably interdigitated electrode pairs.

Alternatively, according to a representative example, the aforementioned "tobacco flavor liquid" can be incorporated into oral tobacco products. That is, according to a representative example, there is provided an oral tobacco product comprising the "tobacco flavor liquid" described above. For example, an oral tobacco product may contain the above-described "tobacco flavor liquid" and a carrier (eg, tobacco residue, tobacco fiber, etc.) impregnated with the tobacco flavor liquid as a tobacco flavor source.

According to a representative example, the above-mentioned "reconstituted tobacco material" can be incorporated into oral tobacco products. Thus, according to representative examples, there is provided an oral tobacco product comprising the aforementioned "reconstituted tobacco material".

The oral tobacco product may further include a liquid-permeable packaging material (for example, a nonwoven sachet) that encloses the tobacco flavor source. Specifically, the oral tobacco product may have the shape of a tea bag in which the tobacco flavor source is wrapped in a nonwoven sachet.

(Example of a liquid atomization type flavor inhaler)
An example of a liquid atomization type flavor inhaler that atomizes the above-mentioned "tobacco flavor liquid" using surface acoustic waves will be described below with reference to FIGS. 2 to 7. FIG.

FIG. 2 is a diagram showing an example of a liquid atomizing flavor inhaler. As shown in FIG. 2, the flavor inhaler 10 has an atomization unit 1100, a first liquid storage section 1200A, a second liquid storage section 1200B, a sensor 1300, a control section 1400, and a power supply 1500. The flavor inhaler 10 has a housing 10X containing an atomization unit 1100, a first liquid reservoir 1200A, a second liquid reservoir 1200B, a sensor 1300, a controller 1400, and a power supply 1500. The housing 10X may have a rectangular box shape as shown in FIG. 2, or may have a cylindrical shape. The flavor inhaler 10 has a chamber 10C communicating from an inlet 10A to an outlet 10B. The outlet 10B may be provided with a mouthpiece 10D. The mouthpiece 10D may be integrated with the housing 10X or may be separate from the housing 10X. Mouthpiece 10D may have a filter.

The atomization unit 1100 atomizes the first liquid supplied from the first liquid storage section 1200A and the second liquid supplied from the second liquid storage section 1200B. The atomization unit 1100 atomizes liquid using a surface acoustic wave (SAW). The atomization unit 1100 includes a SAW module having a piezoelectric body that expands and contracts upon application of a voltage, and a comb-shaped electrode pair that applies a voltage to the piezoelectric body. A liquid supplied to such a SAW module is atomized by SAW generated by voltage application. Unit 1100 may be a detachable cartridge. Details of the atomization unit 1100 will be described later.

In this example, the first liquid storage section 1200A stores the tobacco flavor liquid of the present invention as the first liquid, and the second liquid storage section 1200B stores the flavor component-containing liquid as the second liquid. Each of first liquid storage section 1200A and second liquid storage section 1200B may be a detachable cartridge. Each of the first liquid storage section 1200A and the second liquid storage section 1200B may be integrated with the atomization unit 1100. FIG.

The flavor component-containing liquid, which is the second liquid, can contain a solvent such as water, glycerin, propylene glycol, and ethanol, and a solute (flavor component) that contributes to at least one of aroma and taste. Flavoring ingredients may include volatile and non-volatile ingredients. The volatile component may be any component that is generally used as a perfume. The volatile component may be a plant-derived component or a synthetic component. For example, volatile components are menthol, limonene, linalool, vanillin, tobacco extract, and the like. A non-volatile component may be a component that contributes to taste. For example, non-volatile ingredients include sugars such as glucose, fructose, sucrose and lactose, bitter substances such as tannin, catechin and naringin, acids such as malic acid and citric acid, and salts. The flavor component-containing liquid may be emulsified with an emulsifier or suspended with a dispersant. The flavor component-containing liquid may contain a water-soluble flavor and an ionic substance that are insoluble in glycerin and propylene glycol and soluble in water.

When each of the first liquid storage section 1200A and the second liquid storage section 1200B is a cartridge, the cartridge may integrally include the mouthpiece 10D described above. According to such a configuration, since the mouthpiece 10D is also replaced when the cartridge is replaced, the mouthpiece 10D is sanitarily maintained.

When each of the first liquid storage section 1200A and the second liquid storage section 1200B is a cartridge, the cartridge may be of a disposable type or a refillable type. The refill type is a type in which the user refills the cartridge with his or her favorite liquid.

The sensor 1300 detects the user's puffing action. For example, sensor 1300 detects gas flow through chamber 10C. For example, sensor 1300 is a flow sensor. The flow sensor includes an orifice located within chamber 10C. A flow sensor monitors the differential pressure between the upstream of the orifice and the downstream of the orifice and senses the flow of air through the monitored differential pressure.

The control unit 1400 is configured by a processor, memory, etc., and controls each configuration provided in the flavor inhaler 10 . The control unit 1400 may be a detachable article. For example, the control unit 1400 identifies the start of the puff action based on the detection result of the sensor 1300 . The control section 1400 may start the atomization operation of the atomization unit 1100 in response to the start of the puff operation. The control unit 1400 may specify the stop of the puffing operation based on the detection result of the sensor 1300 . The control section 1400 may stop the atomization operation of the atomization unit 1100 in accordance with the stop of the puff operation. The control section 1400 may stop the atomization operation of the atomization unit 1100 when a certain period of time has passed since the start of the puff operation.

The control unit 1400 may include a voltage/frequency control circuit for controlling a SAW module (see FIG. 6) having a piezoelectric element substrate 1031 including a piezoelectric body and comb-shaped electrode pairs 1033 for applying voltage to the piezoelectric body. The voltage/frequency adjustment circuit controls the frequency and magnitude of power (for example, AC voltage) supplied to the SAW module as the atomization operation of the atomization unit 1100 .

A power source 1500 supplies power to drive the flavor inhaler 10 . The power source 1500 may be a primary battery such as manganese, alkali, oxyride, nickel, nickel manganese, or lithium, or a secondary battery such as a nickel-cadmium battery, a nickel-metal hydride battery, or a lithium battery. The power source 1500 may be an item configured to be detachable.

FIG. 3 is a perspective view showing an example of the appearance of the unit 100 of the flavor inhaler 10 shown in FIG. 4 is a longitudinal sectional view of the unit 100 shown in FIG. 3. FIG. 5 is an exploded perspective view of the unit 100 shown in FIG. 3. FIG. As shown in FIGS. 3 to 5, unit 100 has mouthpiece 10D, atomization unit 1100, first liquid reservoir 1200A, and second liquid reservoir 1200B. In addition, hereinafter, the "flavor sucker" may be simply referred to as "sucker". The "sucker" can be used to suck any inhalable ingredient, not just flavoring ingredients.

As shown in FIG. 4, the first liquid storage part 1200A and the second liquid storage part 1200B are housed inside a housing 100X that forms part of the housing 10X shown in FIG. In this example, the first liquid reservoir 1200A has a cylinder 1204A and a piston 1206A, and the space defined by the cylinder 1204A and the piston 1206A contains the first liquid. Similarly, the second liquid reservoir 1200B has a cylinder 1204B and a piston 1206B, and the second liquid is stored in a space defined by the cylinder 1204B and the piston 1206B. The first liquid storage section 1200A and the second liquid storage section 1200B may be cartridges configured to be detachable from the housing 100X. Also, the first liquid storage section 1200A and the second liquid storage section 1200B may be configured to be detachable at the same time as an integrated cartridge.

As described above, the first liquid is the tobacco flavor liquid of the present invention, and the second liquid is the flavor component-containing liquid.

As shown in FIG. 4, the housing 100X accommodates a motor 1208A and a gearbox 1210A. Motor 1208A is powered by power supply 1500 shown in FIG. The gearbox 1210A can convert the rotational driving force of the motor 1208A into the axial driving force of the piston 1206A. Gearbox 1210A can also vary the rotational speed of motor 1208A. Similarly, housing 100X accommodates motor 1208B and gearbox 1210B, and piston 1206B is driven by motor 1208B and gearbox 1210B. Motor 1208B is powered by power supply 1500 shown in FIG. That is, in this example, the

motors

1208A and 1208B and the

gearboxes

1210A and 1210B constitute a liquid supply section that supplies the liquid from the first liquid storage section 1200A and the second liquid storage section 1200B. Note that a single motor and gearbox may drive both piston 1206A and piston 1206B.

As shown in FIG. 4, the atomization unit 1100 is arranged above the first liquid storage part 1200A and the second liquid storage part 1200B, and is fixed to the upper part of the housing 100X with fasteners 1002 such as screws. Also, the mouthpiece 10D is fixed to the upper portion of the atomization unit 1100 with a fastener 1004 such as a screw.

The atomization unit 1100 is covered with a first cover 1106 and a second cover 1107, as shown in FIG. The first cover 1106 has a first opening 1102 and a second opening 1104 on its upper surface. The first opening 1102 is configured to pass a first aerosol generated by atomizing the first liquid, as will be described later. The second opening 1104 is configured to pass a second aerosol generated by atomizing the second liquid, as will be described later.

Next, the atomization unit 1100 shown in FIGS. 3 to 5 will be described. FIG. 6 is an exploded perspective view of atomization unit 1100 with first cover 1106 and second cover 1107 removed. FIG. 7 is a cross-sectional view of the atomization unit 1100. As shown in FIG. For convenience of explanation, FIG. 7 shows the first liquid storage section 1200A and the second liquid storage section 1200B.

As shown in FIG. 6, the atomization unit 1100 includes a base member 1108, a printed circuit board (PCB) 1109, a piezoelectric element substrate 1031 having comb electrode pairs 1033, a pair of

guide walls

1711A and 1711B, and a top. and a cover 1710 . An adhesive sheet 1110 is provided between the base member 1108 and the printed circuit board (PCB) 1109 to fix the position of the printed circuit board (PCB) 1109 with respect to the base member 1108, and to apply the first liquid and the second liquid. leakage is suppressed.

As shown in FIG. 6, the piezoelectric element substrate 1031 is mounted on the upper surface of the printed circuit board (PCB) 1109. As shown in FIG. The piezoelectric element substrate 1031 includes a piezoelectric body that expands and contracts when voltage is applied. As the piezoelectric body, a known piezoelectric body made of ceramic such as quartz, barium titanate, lithium niobate, or the like can be used. A comb-shaped electrode pair 1033 is provided on the surface side of the piezoelectric element substrate 1031 . The comb-shaped electrode pair 1033 is composed of a first comb-shaped electrode and a second comb-shaped electrode. The first comb-shaped electrode and the second comb-shaped electrode are arranged such that the comb teeth of the first comb-shaped electrode and the comb teeth of the second comb-shaped electrode are alternately arranged in the width direction. The comb-shaped electrode pair 1033 is made of, for example, gold-plated metal. A heat dissipation mechanism 1035 is provided on the back side of the piezoelectric element substrate 1031 . The heat dissipation mechanism 1035 is a mechanism configured to remove heat generated by reflection of surface acoustic waves at the edge of the piezoelectric element substrate 1031 . The heat dissipation mechanism 1035 includes at least one of a heat dissipation layer made of a material having higher thermal conductivity than the piezoelectric element substrate 1031 and a Peltier element. In the example shown in FIG. 7, the heat dissipation mechanism 1035 is a heat dissipation layer arranged on the back surface of the piezoelectric element substrate 1031 .

Also, the piezoelectric element substrate 1031 has a pair of

edges

1031A and 1031B facing each other. The guide wall 1711A is provided on the edge 1031A side of the piezoelectric element substrate 1031, and the guide wall 1711B is provided on the edge 1031B side. The

guide walls

1711A, 1711B respectively have through

holes

1713A, 1713B extending between the upper surface and the lower surface. Further, the

guide walls

1711A, 1711B respectively have

recesses

1714A, 1714B communicating with the through

holes

1713A, 1713B. As shown in FIG. 7, a first liquid reservoir 1200A and a second liquid reservoir 1200B are connected to the lower surfaces of the

guide walls

1711A and 1711B, respectively. The liquids (the first liquid and the second liquid) supplied by the syringe pumps from the first liquid storage section 1200A and the second liquid storage section 1200B pass through the through

holes

1713A and 1713B from bottom to top,

Recesses

1714A and 1714B are reached. The

liquid reaching recesses

1714A and 1714B reaches edges 1031A and 1031B of piezoelectric element substrate 1031 and is atomized by the energy of comb-shaped electrode pair 1033 . That is, the syringe pumps are configured to supply the first liquid and the second liquid to

respective edges

1031A, 1031B of the piezoelectric element substrate 1031 .

Furthermore, the atomization unit 1100 has a sealing member 1111 . The seal member 1111 has a generally annular shape as a whole and contacts the top surfaces of the

guide walls

1711A and 1711B and the top surface of the piezoelectric element substrate 1031 . This prevents the liquid that has reached the

recesses

1714A and 1714B from flowing out of the

guide walls

1711A and 1711B and the piezoelectric element substrate 1031 .

The atomization unit 1100 has a pair of

electrical contacts

1032A, 1032B that electrically connect the contacts provided on the printed circuit board (PCB) 1109 and the comb electrode pair 1033. The atomization unit 1100 also has a sensor 1070 that detects liquid. In the example shown in FIG. 6, sensor 1070 is an electrical conductivity sensor. Sensor 1070 may be an electrical conductivity sensor having a pair of tips. In this case, sensor 1070 detects the presence of liquid by the conductivity of the electrical signal between a pair of tips. In addition, as a sensor for detecting liquid, a sensor having an emitter that outputs a predetermined signal and a receiver that receives the predetermined signal, a SAW sensor that has an emitter that outputs SAW and a receiver that receives SAW, or A capacitive sensor having one or more pairs of electrodes may be employed.

As shown in FIGS. 6 and 7, the top cover 1710 has an opening 1710a in the center for the aerosol to pass through, guide

walls

1711A and 1711B, a printed circuit board (PCB) 1109, and a piezoelectric element substrate 1031. is arranged to cover from above. An O-ring 1113 is provided between the side outer peripheral portion of the top cover 1710 and the first cover 1106 .

Further, as shown in FIG. 7, the opening 1710a of the top cover 1710 is located above the comb electrode pair 1033 and the pair of

edges

1031A and 1031B of the piezoelectric element substrate 1031. This allows the aerosol from the first liquid and the aerosol from the second liquid generated at the pair of

edges

1031 A and 1031 B to flow out of the top cover 1710 . Also, as illustrated, the first cover 1106 is provided so as to cover the surface side of the piezoelectric element substrate 1031 . The first opening 1102 and the second opening 1104 of the first cover 1106 are provided directly above the

edges

1031A and 1031B of the piezoelectric element substrate 1031, respectively. This allows the aerosol from the first liquid and the aerosol from the second liquid generated at each

edge

1031A, 1031B to pass through the first opening 1102 and the second opening 1104, respectively. Thus, the first opening 1102 of the first cover 1106 can emit aerosol primarily from the first liquid, and the second opening 1104 can emit aerosol primarily from the second liquid.

Also, as shown in FIG. 7, the first cover 1106 is provided so as to cover directly above the arrangement portion where the comb-shaped electrode pair 1033 is provided and not to contact the comb-shaped electrode pair 1033 . As a result, the aerosol generated at the

edges

1031A and 1031B can be prevented from coming into contact with the comb-shaped electrode pair 1033 and deteriorating the comb-shaped electrode pair 1033, and the propagation of SAW by the comb-shaped electrode pair 1033 can be prevented from being hindered. The gap between the first cover 1106 and the piezoelectric element substrate 1031 may be several microns, for example. With such a gap, deterioration of the comb-shaped electrode pair 1033 can be sufficiently suppressed.

<5. Preferred embodiment>
Preferred embodiments are summarized below.

[A1] A method for producing a tobacco flavor liquid, comprising treating an acidic tobacco extract having a pH of 4.1 or less with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract.
[A2] The method according to [A1], wherein the treatment is performed by passing the acidic tobacco extract through a solid phase comprising the reversed-phase adsorbent.
[A3] The method according to [A1] or [A2], wherein the treatment is performed by passing the acidic tobacco extract through a column filled with the reversed-phase adsorbent.
[A4] A method for producing a tobacco flavor liquid, comprising treating an acidic tobacco extract having a pH of 4.1 or less by reverse-phase solid-phase extraction to remove colored components from the acidic tobacco extract.

[A5] The method according to any one of [A1] to [A4], wherein the acidic tobacco extract has a pH of 1 to 4.1, preferably 2 to 3.
[A6] Further comprising preparing the acidic tobacco extract prior to the treatment, wherein the preparation of the acidic tobacco extract comprises extracting water-soluble components contained in the tobacco material from the tobacco material with an aqueous solvent. , obtaining a tobacco extract, and adjusting the pH of the tobacco extract to 4.1 or less.
[A7] The preparation of the acidic tobacco extract further comprises adding ethanol to the tobacco extract or to the tobacco extract adjusted to pH 4.1 or less so that the final concentration is 10% by mass or less. The method described in [A6].

[A8] obtaining a tobacco extract by extracting water-soluble components contained in the tobacco material from the tobacco material with an aqueous solvent;
obtaining an acidic tobacco extract by adjusting the pH of the tobacco extract to 4.1 or less;
A method for producing a tobacco flavor liquid, comprising treating the acidic tobacco extract with a reverse-phase adsorbent to remove colored components from the acidic tobacco extract.
[A9] The method according to any one of [A6] to [A8], wherein the aqueous solvent is water.
[A10] The method according to any one of [A6] to [A8], wherein the aqueous solvent is an ethanol aqueous solution having a concentration of 10% by mass or less.

[B1] A tobacco flavor liquid obtained by the method according to any one of [A1] to [A10].
[C1] A tobacco product containing the tobacco flavor liquid according to [B1].
[C2] A flavor inhaler comprising the tobacco flavor liquid according to [B1] and an atomizing unit that atomizes the tobacco flavor liquid using surface acoustic waves.
[C3] The flavor inhaler according to [C2], wherein the atomization unit includes a piezoelectric body and two or more electrodes (for example, two electrodes) for applying a voltage to the piezoelectric body.
[C4] The flavor sucker according to [C3], wherein the electrodes are comb-shaped electrode pairs.

[C5] An oral tobacco product containing the tobacco flavoring liquid according to [B1].
[C6] An oral tobacco product comprising the tobacco flavor liquid according to [B1] and a carrier impregnated with the tobacco flavor liquid as a tobacco flavor source.
[C7] The oral tobacco product of [C6], wherein the carrier is tobacco residue or tobacco fiber.
[C8] The oral tobacco product of [C6] or [C7], further comprising a liquid-permeable packaging material enclosing the tobacco flavor source.

[D1] a tobacco flavor liquid obtained by the method according to any one of [A6] to [A10];
and tobacco residue obtained when obtaining the tobacco extract in the method according to any one of [A6] to [A10].
[D2] The regenerated tobacco material according to [D1], wherein the regenerated tobacco material is a molded tobacco product obtained by molding a material containing the tobacco flavor liquid and the tobacco residue.
[D3] The reconstituted tobacco material according to [D2], wherein the tobacco moldings are sheet tobacco or tobacco granules.

[E1] A tobacco product comprising the regenerated tobacco material according to any one of [D1] to [D3].
[E2] An oral tobacco product comprising the reconstituted tobacco material according to any one of [D1] to [D3].
[E3] The oral tobacco product of [E2], further comprising a liquid-permeable wrapping material enclosing the reconstituted tobacco material.

[Example 1]
In Example 1, color analysis was performed on the tobacco flavoring liquid.

1-1. Preparation of Tobacco Flavor Liquid 751 g of Burley tobacco material was extracted with hot water at 60°C. After that, an aqueous solution of phosphoric acid adjusted to a predetermined pH was added, and the mixture was immersed for 30 minutes while stirring, followed by extraction with shaking for 1 hour. Thereafter, centrifugation (3000 rpm, 5 minutes) was performed, and the supernatant was filtered through a 0.45 μm membrane filter to separate the filtrate (tobacco extract) and extraction residue (tobacco residue).

An aqueous phosphoric acid solution, an aqueous potassium hydroxide solution, and an aqueous sodium sulfate solution were added to 0.5 mL of the obtained tobacco extract to adjust the pH to various values. LAQUA F-72 (HORIBA) was used as a pH meter. The addition of the aqueous potassium hydroxide solution and the aqueous sodium sulfate solution was performed for flavor component analysis (GC-MS analysis) described later.

Each of the pH-adjusted solutions (acidic tobacco extract) was passed through a reversed-phase solid-phase extraction column (Oasis-HLB). A tobacco flavor liquid was thus obtained.

1-2. Analysis Method The tobacco flavor liquid was diluted 10 times and the diluted liquid was subjected to absorbance analysis. As a control, the extract (acidic tobacco extract) before passing through the column was similarly subjected to absorbance analysis.

1-3. Results The results of the absorbance analysis are shown in FIG. 8 and Table 1.

Fig. 8 shows the analysis results of the tobacco flavor liquid obtained from the pH 2.2 acidic tobacco extract. Table 1 shows the analysis results of tobacco flavor liquids obtained from acidic tobacco extracts with various pHs. In Table 1, an absorbance of about 0.1 or less indicates that the tobacco flavor liquid has the desired colorlessness.

The results in FIG. 8 show that the acidic tobacco extract is colored, but the tobacco flavor liquid is colorless as the colored components are removed. The results in Table 1 show that the tobacco flavor liquid obtained from the acidic tobacco extract having a pH of 5.6 or less is colorless because the colored components are removed.

[Example 2]
In Example 2, the flavor components in the tobacco flavor liquid were analyzed.

2-1. Method A tobacco flavor liquid was prepared according to the method described in Example 1, and the tobacco flavor liquid was subjected to GC-MS analysis. A tobacco flavor liquid was prepared from an acidic tobacco extract having a pH of 0.9 to 5.3. As flavor components, the amounts of nicotine, myosmine, anabasine, nicotyline, anatabine, and dipyridyl were analyzed.

2-2. Results FIG. 9 shows the analysis results of nicotine. FIG. 9 is a graph showing the relationship between the pH of the acidic tobacco extract and the nicotine content in the tobacco flavor liquid.

The results of FIG. 9 show that when the tobacco flavor liquid is prepared from the acidic tobacco extract adjusted to pH 4.1 or lower, almost no nicotine is removed from the acidic tobacco extract by treatment with the reversed-phase solid-phase extraction column. 3, nicotine is easily removed from the acidic tobacco extract by treatment with a reversed-phase solid-phase extraction column.

With regard to myosmin and nicotyline, in all cases where the tobacco flavor liquid was prepared from the acidic tobacco extract adjusted to pH 0.9 to 5.3, the flavor components were extracted from the acidic tobacco extract by treatment with a reversed-phase solid-phase extraction column. was hardly removed.

With respect to anabasine, anatabine, and dipyridyl, in the case of acidic tobacco extracts adjusted to pH 3.2 or less, treatment with a reversed-phase solid-phase extraction column hardly removes the flavor components from the acidic tobacco extracts. In the case of the adjusted acidic tobacco extract, some flavor components were removed from the acidic tobacco extract, and in the case of the acidic tobacco extract adjusted to pH 5.3, the flavor components were easily removed from the acidic tobacco extract.

[Example 3]
In Example 3, tobacco-specific nitrosamines (TSNAs) in tobacco flavor liquids were analyzed.

3-1. Method A tobacco flavor liquid was prepared according to the method described in Example 1, and the tobacco flavor liquid was subjected to LC-MS-MS analysis. A tobacco flavor liquid was prepared from an acidic tobacco extract having a pH of 0.9 to 5.3.

3-2. Results Table 2 shows the analysis results of the amount of TSNA.

The TSNA contents shown in Table 2 are 4-(methylnitrosoamino)-1-(3-pyridyl)-1-butanone (NNK) content, N'-nitrosonornicotine (NNN) content, N'-nitrosoanatabine (NAT) content and the sum of N'-nitrosoanabasine (NAB) content. Also, the TSNA reduction rate shown in Table 2 indicates a value calculated by the following formula.
TSNA reduction rate [%] = {(TSNA content in acidic tobacco extract) - (TSNA content in tobacco flavoring liquid) / (TSNA content in acidic tobacco extract)} x 100

The results in Table 2 show that TSNAs were removed by treatment with a reversed-phase solid-phase extraction column in all cases where tobacco flavor liquids were prepared from acidic tobacco extracts adjusted to pH 0.9 to 4.1. show.

According to the results of Examples 1 to 3, when a tobacco flavor liquid was prepared from the acidic tobacco extract adjusted to pH 4.1 or less by treatment with a reversed-phase solid-phase extraction column, the tobacco flavor components contained in the tobacco extract were removed. It can be seen that the colored components and tobacco-specific nitrosamines (TSNAs) can be removed from the tobacco extract while maintaining.

[Example 4]
In Example 4, the effect of ethanol addition on the preparation of tobacco flavor liquid was investigated.

4-1. Preparation of Tobacco Flavor Liquid An acidic tobacco extract (pH 2.2 or 3.2) was prepared according to the method described in Example 1, and ethanol was added to the acidic tobacco extract to give a predetermined ethanol concentration. The acidic tobacco extract was then passed through a reverse-phase solid-phase extraction column (Oasis-HLB). A tobacco flavor liquid was thus obtained.

4-2. Analysis Method Tobacco flavor liquid was subjected to GC-MS analysis. Tobacco flavor liquids were prepared from acidic tobacco extracts containing various concentrations of ethanol. As flavor components, the amounts of myosmin, anabasine, anatabine, dipyridyl, benzaldehyde, phenethyl alcohol, and megastigmatrienone were analyzed.

4-3. Results FIG. 10 shows the analysis results of benzaldehyde. FIG. 10 is a graph showing the relationship between the ethanol concentration in the acidic tobacco extract and the benzaldehyde content in the tobacco flavor liquid.

The results in FIG. 10 show that adding ethanol to the acidic tobacco extract and preparing a tobacco flavoring liquid using the obtained tobacco extract can increase the benzaldehyde content in the tobacco flavoring liquid.

For other flavor components (myosmin, anabasine, anatabine, dipyridyl, phenethyl alcohol, and megastigmatrienone), similarly to benzaldehyde, ethanol was added to the acidic tobacco extract, and the resulting tobacco extract was used to prepare the tobacco flavor. By preparing the liquid, it was possible to increase the content of flavor components in the tobacco flavor liquid.

However, when the ethanol content in the acidic tobacco extract increased, it became difficult to remove colored components by treatment with a reversed-phase solid-phase extraction column, and the colorlessness of the tobacco flavor liquid decreased. For example, when the ethanol content in the acidic tobacco extract is 50% by mass, the tobacco flavoring liquid is colored brown, and when the ethanol content in the acidic tobacco extract is 10% by mass, the tobacco flavoring liquid is almost It was colorless. Therefore, ethanol is preferably added to the acidic tobacco extract so that the final concentration is 10% by mass or less.

According to the results of Example 4, when the acidic tobacco extract contains ethanol at a concentration of 10% by mass or less, the tobacco flavor liquid obtained as the final product exhibits a colorless or nearly colorless color, while exhibiting a colorless or nearly colorless color. It can be seen that the tobacco flavoring component can be included in an amount of

DESCRIPTION OF SYMBOLS 10... Flavor sucker, 10X... Housing, 10A... Inlet, 10B... Outlet, 10C... Chamber, 10D... Mouthpiece,
DESCRIPTION OF SYMBOLS 1100... Atomization unit, 1200A... 1st liquid storage part, 1200B... 2nd liquid storage part, 1300... Sensor, 1400... Control part, 1500... Power supply,
100... unit, 100X... housing,
1002... Fixing tool, 1004... Fixing tool,
1102...first opening, 1104...second opening, 1106...first cover, 1107...second cover,
1204A... cylinder, 1204B... cylinder, 1206A... piston, 1206B... piston, 1208A... motor, 1208B... motor, 1210A... gear box, 1210B... gear box,
1031 Piezoelectric element substrate 1031A Edge 1031B Edge

1032A Electrical contact

1032B Electrical contact 1033 Comb electrode pair 1035 Heat dissipation mechanism 1070 Sensor
DESCRIPTION OF SYMBOLS 1108... Base member 1109... Printed circuit board (PCB) 1110... Adhesive sheet 1111... Seal member 1113... O-ring,
1710 top cover 1710a opening 1711A guide wall 1711B guide wall 1713A through hole 1713B through hole 1714A recess 1714B recess

Claims

A method for producing a tobacco flavor liquid, comprising treating an acidic tobacco extract having a pH of 4.1 or less with a reversed-phase adsorbent to remove colored components from the acidic tobacco extract.
The method according to claim 1, wherein said treatment is carried out by passing said acidic tobacco extract through a solid phase comprising said reversed-phase adsorbent.
Further comprising preparing the acidic tobacco extract prior to the treatment with the reversed-phase adsorbent, wherein the preparation of the acidic tobacco extract removes water-soluble components contained in the tobacco material from the tobacco material in an aqueous solvent. 3. The method according to claim 1 or 2, comprising extracting with to obtain a tobacco extract, and adjusting the pH of the tobacco extract to 4.1 or less.
3. The preparation of said acidic tobacco extract further comprises adding ethanol to said tobacco extract or said tobacco extract adjusted to pH 4.1 or less so that the final concentration is 10% by mass or less. The method described in .
A tobacco flavor liquid obtained by the method according to any one of claims 1 to 4.
A tobacco product containing the tobacco flavor liquid according to claim 5.
A flavor inhaler comprising the tobacco flavor liquid according to claim 5 and an atomization unit that atomizes the tobacco flavor liquid using surface acoustic waves.
A tobacco flavor liquid obtained by the method according to claim 3 or 4;
and tobacco residue obtained when obtaining the tobacco extract in the method of claim 3 or 4.
A tobacco product comprising the regenerated tobacco material according to claim 8.
An oral tobacco product comprising the tobacco flavor liquid according to claim 5 or the reconstituted tobacco material according to claim 8.