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Plant volatile essential oil rapid extraction and determination device

An extraction device and plant essential oil technology, which is applied in the field of extraction and utilization of natural chemicals, can solve problems such as time-consuming, difficult to be widely used, cumbersome operation, etc.

Pending Publication Date: 2022-02-11
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method usually requires 5-6 hours of distillation time to fully extract the essential oil in the plant sample to obtain more reliable measurement data; in addition, the pretreatment of the plant sample (shearing or crushing), pre-soaking, cooling after distillation The overall measurement time can be as long as 8-10 hours for stratification and other links. Not only is the operation cumbersome and time-consuming, but also large measurement errors may occur when the scale of plant samples is small or the content of essential oils is low.
In addition to the volumetric method used to quantify the extracted essential oils, there are also reports using quantitative methods such as weight loss on drying and ultraviolet absorption, but there are too many interfering factors and it is difficult to use them universally.

Method used

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  • Plant volatile essential oil rapid extraction and determination device
  • Plant volatile essential oil rapid extraction and determination device
  • Plant volatile essential oil rapid extraction and determination device

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Embodiment 1: Utilize the device of the present invention, according to the above-mentioned determination step of plant volatile essential oil content, measure the content of wormwood essential oil with ohmic heating method. Add 15g of wormwood (water content 10.91%) to pulverize with water for 1min, add 91.9g of water, ohmic heating for 2h, electric field strength of 14V / cm, frequency of 50Hz, stable heating power of 65-70W, extract essential oil and add n-hexane extraction, constant volume Refractive index was measured afterward, and the volume of essential oil was calculated according to the standard curve equation of essential oil concentration and refractive index to be 0.0924mL. The essential oil content was determined to be 6.16uL / g, the recovery rate was 96.29% (relative to the national pharmacopoeia method in the control example), and the coefficient of variation was 2.9% by three parallel determinations.

Embodiment 2

[0068] Embodiment 2: Utilize the device of the present invention, according to the above-mentioned determination step of plant volatile essential oil content, measure the content of moxa essential oil with ohmic heating method. Add 500mL of deionized water to 100g moxa moxa (water content 7.86%), heat in ohm for 2h under electric field strength 18V / cm, frequency 50Hz, stable heating power 360-400W, condense the essential oil in the liquid separator and extract with n-hexane After constant volume, the refractive index was measured, and then calculated according to the standard curve equation of essential oil concentration and refractive index, the volume of essential oil was 0.094mL. The content of the essential oil was determined to be 0.94uL / g, the recovery rate was 108.04% (compared to the national pharmacopoeia method in the control example), and the coefficient of variation was 3.7% by three parallel determinations.

[0069] The above-mentioned embodiments have reflected t...

Embodiment 3

[0070] Embodiment 3: Using the device of the present invention, according to the above-mentioned determination steps of plant volatile essential oil content, the content of wormwood essential oil is determined by ohmic heating method. Add 80g of wormwood (water content 10.91%) to pulverize with water for 1min, add 460mL of deionized water, heat in ohm for 2h under electric field strength of 18V / cm, frequency of 50Hz, stable heating power of 380-400W, and condense the volume of essential oil in the liquid separator It was 0.497mL, and the essential oil content was determined to be 6.21 uL / g.

[0071] This embodiment has reflected that if adopt larger sample size, also can adopt volumetric method to measure the volatile essential oil content in the plant tissue, the rate of recovery is 97.2% (relative to national pharmacopoeia law), its measurement result is basically consistent with national pharmacopoeia law, However, the measurement time was greatly shortened.

[0072] The a...

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Abstract

A disclosed plant volatile essential oil rapid extraction and determination device comprises a heating tank, a condensation-liquid separator and a gas-liquid circulation pipeline; the heating tank comprises a tank body, an upper electrode plate and a lower electrode plate which are arranged in the tank body and can be connected with an external power supply to form an ohmic heater, and a central circulating pipe inserted into a material space between the upper electrode plate and the lower electrode plate; the condensation-liquid separator comprises a condenser and an oil-water separator communicating with the lower part of the condenser; and the gas-liquid circulation pipeline comprises a steam guide pipe and a return pipe which achieve communicating between the heating tank and the condensation-liquid separator to realize gas-liquid circulation. Hot fluid input is not needed in the extraction operation process. The invention also relates to application of the device in extraction and content determination of plant volatile essential oil. By utilizing the device, the plant essential oil can be efficiently extracted.

Description

technical field [0001] The invention relates to the field of extraction and utilization of natural chemicals and related industries, in particular to an extraction and determination device for plant volatile essential oils and a method for using the same. Background technique [0002] Plant essential oils are a class of secondary metabolites present in plant tissues. Most plant essential oils not only have aromatic odor, but also have anti-oxidation, antibacterial and anti-inflammatory, anti-cancer, insect repellent and other effects. Therefore, plant essential oils can be used in research and development of medical care, natural health-care cosmetics, food additives, etc., and have a wide range of application values. [0003] Plant essential oils can be extracted by extraction, pressing and distillation. However, for the industrial extraction of volatile plant essential oils, steam distillation is still the main method to obtain more stable product quality. In order to i...

Claims

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Application Information

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IPC IPC(8): C11B9/02G01N21/41
CPCC11B9/027C11B9/022G01N21/41
Inventor 张黎刘晔翟爱霞向君李云雁宋光森张垒
Owner WUHAN POLYTECHNIC UNIVERSITY
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