Method for enriching burnt-sweet aroma note in yunnan flue-cured tobacco and aerosol-forming material

Abstract

A method for enriching a burnt-sweet aroma note in Yunnan flue-cured tobacco includes: S1: diluting a Yunnan flue-cured tobacco extract with a diluent to obtain an obtained diluted solution; S2: subjecting the obtained diluted solution to an elution treatment using a C18 column under a pressure of 5-20 bar, the elution treatment including: first performing a primary elution with a first eluent, then performing a secondary elution with a second eluent, and collecting a secondary elution solution as a collected secondary elution solution, the first eluent including water or an aqueous ethanol solution with a mass concentration of less than 10%, and the second eluent including an aqueous ethanol solution with a mass concentration of 38-42%; and S3: concentrating the collected secondary elution solution to obtain a sample with the burnt-sweet aroma note.

What is claimed is: 
     
         1 . A method for enriching a burnt-sweet aroma note in Yunnan flue-cured tobacco, comprising:
 S1: diluting a Yunnan flue-cured tobacco extract with a diluent to obtain an obtained diluted solution;   S2: subjecting the obtained diluted solution to an elution treatment using a C18 column under a pressure of 5-20 bar, the elution treatment comprising:
 first performing a primary elution with a first eluent, 
 then performing a secondary elution with a second eluent, and 
 collecting a secondary elution solution as a collected secondary elution solution, 
 wherein the first eluent comprises water or an aqueous ethanol solution with a mass concentration of less than 10%, and 
 wherein the second eluent comprises an aqueous ethanol solution with a mass concentration of 38-42%; and 
   S3: concentrating the collected secondary elution solution to obtain a sample with the burnt-sweet aroma note.   
     
     
         2 . The method of  claim 1 , wherein in S2, a flow rate of the elution treatment is 20 mL/min-80 mL/min. 
     
     
         3 . The method of  claim 1 , wherein in S2, an amount of the first eluent is 3 BV-5 BV, and/or wherein an amount of the second eluent is 3 BV-5 BV. 
     
     
         4 . The method of  claim 1 , wherein in S1, a mass ratio of the Yunnan flue-cured tobacco extract to a solvent is 1:1-1:5. 
     
     
         5 . The method of  claim 2 , wherein in S1, a mass ratio of the Yunnan flue-cured tobacco extract to a solvent is 1:1-1:5. 
     
     
         6 . The method of  claim 3 , wherein in S1, a mass ratio of the Yunnan flue-cured tobacco extract to a solvent is 1:1-1:5. 
     
     
         7 . The method of  claim 1 , wherein in S1, the diluent comprises at least one of water, ethanol, propylene glycol, and glycerol. 
     
     
         8 . The method of  claim 1 , wherein in S3, concentration under reduced pressure is adopted, and/or wherein the concentration is performed until a density of a concentrated solution is 1.1920-1.208 g/cm 3 . 
     
     
         9 . The method of  claim 8 , wherein in S3, a temperature for the concentration under reduced pressure is 45-65° C., and a pressure for the concentration under reduced pressure is 60-120 mbar. 
     
     
         10 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 1 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         11 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 2 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         12 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 3 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         13 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 4 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         14 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 5 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         15 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 6 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         16 . A sample of a burnt-sweet aroma note of Yunnan flue-cured tobacco enriched by the method of  claim 7 , the sample comprising:
 20-30 μg/ml of furfural;   20-30 μg/mL of 3-methyl-1,2-cyclopentenedione;   20-25 μg/mL of maltol; and   35-40 μg/mL of 2-cyclopentene-1,4-dione.   
     
     
         17 . An aerosol-forming material, comprising:
 the sample of  claim 10 .   
     
     
         18 . The aerosol-forming material of  claim 17 , wherein the aerosol-forming material comprises atomization liquid comprising 0.5-2 wt % of the sample of the burnt-sweet aroma note of Yunnan flue-cured tobacco and 98-99.5 wt % of a solvent. 
     
     
         19 . The aerosol-forming material of  claim 18 , wherein the solvent comprises a mixed solvent of propylene glycol and glycerol. 
     
     
         20 . The aerosol-forming material of  claim 19 , wherein a mass ratio of the propylene glycol to the glycerol is 6:4-1:1.