A method for highly selective extraction of northern mugwort essential oil

Abstract

A method for extracting the essential oil of Artemisia argyi with high selectivity, comprising the following steps: step 1) drying the raw material of Artemisia argyi leaves and pulverizing them into powder; Subcritical butane is injected into the extraction as the extraction solvent, and the extraction solvent completely submerges the Artemisia argyi leaf sample, and the entrainer hydrophobic ionic liquid [C 4 C 10 im] CF 3 SO 3 , the source of extraction heat is the far-infrared generating device placed at the bottom of the extraction tank, and there is a glass window at the bottom of the extraction tank. Step 3) The liquid solvent is pumped into the evaporation tank, and the liquid solvent is subjected to constant temperature and decompression precipitation treatment to obtain the northern mugwort essential oil. The method has the advantages of simple process, low investment and high efficiency, and can industrially produce the extraction method of high-quality northern mugwort essential oil.

Description

technical field

[0001] The invention relates to the field of natural product extraction, in particular to a method for extracting mugwort essential oil with simple process, high selectivity, high extraction rate and easy industrial production. Background technique

[0002] North Ai ( Artemisia vulgaris L. ), is a perennial herb of the genus Artemisia in the family Asteraceae, and is called the "Four Famous Artemisias" in Chinese history together with Hai AI, Qi AI, and Qi AI. The whole herb of Bei Ai has the functions of warming Qi and blood, expelling cold and dampness, hemostasis, warming meridians, and preventing miscarriage. The content of North Artemisia argyi essential oil is rich, which is more than twice that of common Artemisia argyi leaves. It has a special aroma, and its aroma components are the main functional components of traditional moxibustion. Artemisia argyi essential oil has the effect of repelling mosquitoes, antibacterial, bactericidal, anti-virus, ant...

Examples

Embodiment 1

[0029] Example 1 Drawing of the standard curve of Artemisia argyi essential oil

[0030] Preparation of standard curve: Accurately weigh the essential oil of Artemisia argyi extracted by steam distillation and dilute it with n-hexane to a concentration of 0.015 mg / mL as a stock solution for later use. Precisely draw 1.0, 1.5, 2.0, 2.5, 3.0 mL of the stock solution into a 10mL volumetric flask and dilute to the mark, perform wavelength scanning in the range of 200-400nm, and record the absorbance at the maximum absorption wavelength, with the absorbance A as the ordinate, Concentration c (mg / mL) of Artemisia argyi essential oil is drawn as the standard curve on the abscissa ( figure 2 ). And fit the regression equation:

[0031] y =149.6 x +0.049 (1)

[0032] Correlation coefficient: R 2 = 0.9875

[0033]Linear range: 0.0015-0.0045 mg / mL

[0034] Calculation of the purity of the essential oil: Accurately absorb 0.001 g of the northern Artemisia argyi essential oil ex...

Embodiment 2

[0037] Example 2 Traditional subcritical butane extraction of Artemisia argyi essential oil

[0038] Grind and pass through a 40-mesh sieve with a water content of less than 8%. Take 100 g and place it in an extraction tank. Vacuumize until the vacuum in the extraction tank reaches -100 kPa. Inject subcritical butane for extraction into the extraction tank. As the extraction solvent, the Artemisia argyi sample was completely submerged, the mass volume ratio of Artemisia argyi and butane was 1:10 g / ml, the extraction temperature was controlled at 30°C by an automatic controller and thermal circulating water, the extraction pressure was 0.3 Mpa, and the extraction time was 30 minutes, 3 times of circular extraction; after the extraction, the liquid solvent is pumped into the evaporation tank, and the mugwort leaf residue and the liquid solvent are subjected to constant temperature and reduced pressure precipitating treatment respectively. The precipitating temperature is 30°C. G...

Embodiment 3

[0041] Embodiment 3 The method used in the present invention extracts Artemisia argyi essential oil

[0042] Grind and pass through a 40-mesh sieve with a water content of less than 8%. Take 100 g and place it in an extraction tank. Vacuumize until the vacuum in the extraction tank reaches -100 kPa. Inject subcritical butane for extraction into the extraction tank. As the extraction solvent, the Artemisia argyi sample was completely submerged, the mass volume ratio of Artemisia argyi and butane was 1:10 g / ml, and the entrainer for extraction was [C 4 C 10 im] CF 3 SO 3 5 g of ionic liquid, the extraction temperature is controlled at 30°C by the automatic controller and the far-infrared generator at the bottom of the extraction tank, the far-infrared power is 800 W, the wavelength range is 25-200 μm, the extraction pressure is 0.3 Mpa, and the extraction time is 8 minutes , cyclically extracting twice; after the extraction, the liquid solvent is pumped into the evaporation t...

technical field

[0001] The invention relates to the field of natural product extraction, in particular to a method for extracting mugwort essential oil with simple process, high selectivity, high extraction rate and easy industrial production. Background technique

[0002] North Ai ( Artemisia vulgaris L. ), is a perennial herb of the genus Artemisia in the family Asteraceae, and is called the "Four Famous Artemisias" in Chinese history together with Hai AI, Qi AI, and Qi AI. The whole herb of Bei Ai has the functions of warming Qi and blood, expelling cold and dampness, hemostasis, warming meridians, and preventing miscarriage. The content of North Artemisia argyi essential oil is rich, which is more than twice that of common Artemisia argyi leaves. It has a special aroma, and its aroma components are the main functional components of traditional moxibustion. Artemisia argyi essential oil has the effect of repelling mosquitoes, antibacterial, bactericidal, anti-virus, ant...

Examples

Embodiment 1

[0029] Example 1 Drawing of the standard curve of Artemisia argyi essential oil

[0030] Preparation of standard curve: Accurately weigh the essential oil of Artemisia argyi extracted by steam distillation and dilute it with n-hexane to a concentration of 0.015 mg / mL as a stock solution for later use. Precisely draw 1.0, 1.5, 2.0, 2.5, 3.0 mL of the stock solution into a 10mL volumetric flask and dilute to the mark, perform wavelength scanning in the range of 200-400nm, and record the absorbance at the maximum absorption wavelength, with the absorbance A as the ordinate, Concentration c (mg / mL) of Artemisia argyi essential oil is drawn as the standard curve on the abscissa ( figure 2 ). And fit the regression equation:

[0031] y =149.6 x +0.049 (1)

[0032] Correlation coefficient: R 2 = 0.9875

[0033]Linear range: 0.0015-0.0045 mg / mL

[0034] Calculation of the purity of the essential oil: Accurately absorb 0.001 g of the northern Artemisia argyi essential oil ex...

Embodiment 2

[0037] Example 2 Traditional subcritical butane extraction of Artemisia argyi essential oil

[0038] Grind and pass through a 40-mesh sieve with a water content of less than 8%. Take 100 g and place it in an extraction tank. Vacuumize until the vacuum in the extraction tank reaches -100 kPa. Inject subcritical butane for extraction into the extraction tank. As the extraction solvent, the Artemisia argyi sample was completely submerged, the mass volume ratio of Artemisia argyi and butane was 1:10 g / ml, the extraction temperature was controlled at 30°C by an automatic controller and thermal circulating water, the extraction pressure was 0.3 Mpa, and the extraction time was 30 minutes, 3 times of circular extraction; after the extraction, the liquid solvent is pumped into the evaporation tank, and the mugwort leaf residue and the liquid solvent are subjected to constant temperature and reduced pressure precipitating treatment respectively. The precipitating temperature is 30°C. G...

Embodiment 3

[0041] Embodiment 3 The method used in the present invention extracts Artemisia argyi essential oil

[0042] Grind and pass through a 40-mesh sieve with a water content of less than 8%. Take 100 g and place it in an extraction tank. Vacuumize until the vacuum in the extraction tank reaches -100 kPa. Inject subcritical butane for extraction into the extraction tank. As the extraction solvent, the Artemisia argyi sample was completely submerged, the mass volume ratio of Artemisia argyi and butane was 1:10 g / ml, and the entrainer for extraction was [C 4 C 10 im] CF 3 SO 3 5 g of ionic liquid, the extraction temperature is controlled at 30°C by the automatic controller and the far-infrared generator at the bottom of the extraction tank, the far-infrared power is 800 W, the wavelength range is 25-200 μm, the extraction pressure is 0.3 Mpa, and the extraction time is 8 minutes , cyclically extracting twice; after the extraction, the liquid solvent is pumped into the evaporation t...

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