A method for simultaneously removing pesticide residues and plasticizers in Luo Han Guo extract

Abstract

The invention discloses a method for removing pesticide residues and a plasticizer from a fructus momordicae extract at the same time. The method comprises the following steps: (1) extracting the fructus momordicae extract by using supercritical carbon dioxide fluid containing an entrainer, and lowering the temperature and reducing the pressure after extraction until the temperature and the pressure are normal to obtain an initial extract of the fructus momordicae extract; (2) dissolving the initial extract of the fructus momordicae extract in water, and performing nanofiltration to obtain nanofiltration trapped fluid of the fructus momordicae extract; and (3) performing spray drying to obtain the fructus momordicae extract without the pesticide residues and the plasticizer. By use of the method disclosed by the invention, the pesticide residues and the plasticizer in the fructus momordicae extract can be removed at the same time, the removal rate of the pesticide residues can reach 88.94%, the removal rate of the plasticizer can reach 92.54%, the indexes of the residual quantities can reach the latest national standard GB2763-2014 'Maximum Residue Limits of Pesticides in Food', and the loss rate of momordica glycoside V in the fructus momordicae extract is 0. The method disclosed by the invention is simple, low in cost, safe and environment-friendly, and contains no residues of chemical reagents.

Description

technical field [0001] The invention relates to a method for simultaneously removing pesticide residues and plasticizers, in particular to a method for simultaneously removing pesticide residues and plasticizers in Luo Han Guo extracts. Background technique [0002] In the modern planting industry that advocates "green", "organic" and "environmentally friendly", the use of pesticides and plasticizers is still quite common. According to media reports, the average amount of pesticides per unit area in my country is 2.5 to 5.0 times higher than the world average; the excessive use of plastic bags and plastic products in daily life has caused plasticizer pollution to all walks of life and thousands of households. In recent years, due to the massive and uncontrolled and unreasonable use of pesticides and plasticizers in agricultural and industrial production processes, the adverse effects of these two important chemical pollutants on food safety and human health have caused incre...

AI Technical Summary

Problems solved by technology

However, all methods have a common disadvantage, that is, they cannot effectively remove the two pollutants of pesticide residues and plasticizers at the same time.

[0005] CN105533399A and CN104560469A both disclose the method of using biological enzymes and chemical solvents to remove pesticide residues in fruits and vegetables. Although the above methods can remove some pesticide residues, the residues of chemical solvents are increased after treatment, and there is no removal effect on plasticizer residues.

[0006] CN105433199A discloses a device for ultrasonically removing pesticide residues in fruits and vegetables, and CN204994573U discloses a device that utilizes ozone to remove pesticide residues in tea leaves. The above method can only clean the pesticide residues on the surface of agricultural products, but cannot remove the pesticide residues and plasticizers inside

[0007] CN1723969A discloses a kind of supercritical CO 2 The method of removing organochlorine pesticides in ginseng, due to its single method, has limited effect on removing pesticide residues. This method only has a partial removal effect on organochlorine pesticides, and cannot remove other types of pesticide residues and plasticizers.