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Method for removing pesticide residue in citrus essential oil

A technology of pesticide residues and citrus, which is applied in the field of plant essential oils, can solve problems such as removal, and achieve the effects of small losses, reduced energy consumption, and simple process flow

Active Publication Date: 2015-02-18
BIO SCENT INNOVATION XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no literature reports or related published patents on the removal of pesticide residues in essential oils, especially citrus essential oils.

Method used

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  • Method for removing pesticide residue in citrus essential oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 450g of crudely processed sweet orange essential oil as raw material, completely absorb it with 400g of octadecylsilane, put it into the extraction kettle, and then fill it with octadecylsilane that has not absorbed the essential oil and compact it. Set the extraction pressure to 7.5MPa, the extraction temperature to 32°C, the temperature of the separation tank to 30°C, and the pressure to 3MPa. After 1 hour of extraction to remove pesticide residues, nearly 75% of chlorpyrifos, chlorpyrifos, and dimethoate were removed, and the loss of aroma components in sweet orange essential oil was <5%.

Embodiment 2

[0032]360g of crudely processed lemon essential oil was used as raw material, completely absorbed with 400g of 40-60 mesh microsphere silica gel, mixed evenly, put into a 2L extraction kettle and compacted, then filled with microsphere silica gel not adsorbed essential oil and compacted. Set the extraction pressure to 10MPa, the extraction temperature to 40°C, the temperature of the separation tank to 45°C, and the pressure to 5MPa. After 1.5 hours of extraction to remove pesticide residues, nearly 73% of chlorpyrifos, chlorpyrifos, and dimethoate were removed, and the loss of aroma components in lemon essential oil was <5%.

Embodiment 3

[0034] Take 350g of crudely processed bergamot essential oil as raw material, absorb with 350ml, 60-80 mesh diatomite, mix well, put it into a 2L extraction kettle, and then add 1650ml, 60-80 mesh diatomite. Set the extraction pressure to 13MPa, the extraction temperature to 55°C, the temperature of the separation tank to 60°C, and the pressure to 7MPa. After 2 hours of extraction to remove pesticide residues, nearly 71% of chlorpyrifos, chlorpyrifos, and dimethoate were removed, and the loss of aroma components in bergamot essential oil was <5%.

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Abstract

The invention discloses a method for removing a pesticide residue in citrus essential oil, and relates to plant oil. The method comprises the steps of evenly mixing the citrus essential oil with a column chromatography material; setting supercritical extraction conditions, wherein the supercritical extraction time is 40-120 minutes, the supercritical extraction pressure is 7.5-13 MPa, and the supercritical extraction temperature is 32-55 DEG C; pumping supercritical carbon dioxide fluid into an extraction kettle; dissolving main aroma components in the citrus essential oil into the supercritical carbon dioxide fluid to be extracted before an organophosphorus pesticide under the common effects of the supercritical carbon dioxide and the column chromatography material; entering a separation kettle from an extraction kettle, so as to achieve separation with residual organophosphorus pesticide; and collecting an extract in the separation kettle after extraction is finished, namely, the citrus essential oil after the pesticide residue is removed. The method is good in effect of removing the organophosphorus pesticide residue, simple in process, mild in condition, green and environment-friendly; the aromatic ingredients in the citrus essential oil can be reserved.

Description

technical field [0001] The invention relates to plant essential oils, in particular to a method for removing organophosphorus pesticide residues in citrus essential oils by means of supercritical extraction combined with column chromatography. Background technique [0002] As the most commonly used essential oil product at present, citrus plant essential oil has a fresh, sweet smell and a characteristic fruity aroma of citrus. They have the functions of beauty care, sedation and pain relief, stimulation reduction, antibacterial and anti-inflammation, anti-oxidation, stimulation of vitality, and active thinking. They can be used to improve the irritability, anxiety, depression, and depression of modern urban people who are under long-term stress. [0003] While the civilization of human society has progressed, it has also brought about extremely serious environmental pollution. The use of pesticides for a long time has benefited mankind, but it has also caused serious enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04
Inventor 刘祝君曾骥孟刘节喜林天送谢加凤
Owner BIO SCENT INNOVATION XIAMEN