Method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits

A pesticide residue and ultraviolet technology, applied in the direction of food science, etc., to achieve good irradiation uniformity, improve the quality and safety of wolfberry, and high technological content

Inactive Publication Date: 2016-03-16
青海出入境检验检疫局综合技术中心 +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the research on the application of ozone and ultraviolet irradiation to degrade water pollution has been reported, but there is no relevant report at home and abroad on the use of ozone and ultraviolet irradiation to degrade imidacloprid and acetamiprid residues in Lycium barbarum

Method used

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  • Method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits

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Experimental program
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Effect test

Embodiment 1

[0022] Prepare the test pesticide into an aqueous solution with a concentration of 50mg / L, spray it evenly on the wolfberry, so that the wolfberry contains a certain concentration of pesticide residues, and dry it in the air. Lay the treated dried wolfberry fruit on the tray, with a stacking thickness of 0.5cm; place the tray covered with wolfberry in the irradiation box, and accept the intensity of the ultraviolet emission device in the irradiation box to 450μW / cm 2 Ultraviolet irradiation; the filling concentration in the ultraviolet irradiation box is 1.5mg / m 3 Ozone; Lycium barbarum was irradiated for 4 hours in the ultraviolet irradiation box.

Embodiment 2

[0024] Lay the treated dried wolfberry fruit on a pallet with a stacking thickness of 10cm; place the pallet covered with wolfberry in an irradiation box, and accept the intensity of the ultraviolet emitting device in the irradiation box to be 750 μW / cm 2 Ultraviolet irradiation; the filling concentration in the ultraviolet irradiation box is 2.5mg / m 3 Ozone; Lycium barbarum was irradiated for 8 hours in the ultraviolet irradiation box.

Embodiment 3

[0026] Lay the treated dried wolfberry fruit on a tray with a stacking thickness of 20cm; place the tray covered with wolfberry in an irradiation box, and accept the intensity of the ultraviolet emission device in the irradiation box to 900μW / cm 2 Ultraviolet irradiation; the filling concentration in the ultraviolet irradiation box is 3.5mg / m 3 Ozone; Lycium barbarum was irradiated for 12 hours in the ultraviolet irradiation box.

[0027] Table 1 Ozone-assisted UV degradation of imidacloprid and acetamiprid in Lycium barbarum

[0028]

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Abstract

The invention relates to a method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits, and belongs to the technical field of ozone assisted ultraviolet degradation of residues of the following two restricted pesticides: acetamiprid and imidacloprid, in the wolfberry fruits. The method comprises the following steps: spreading dry wolfberry fruits on a tray to make the accumulation thickness be 0.5-20cm; and placing the tray with the wolfberry fruits in an irradiation box, and irradiating with ultraviolet rays with the intensity of 450-900[mu]W / cm<2>, generated by an ultraviolet ray emission device in the irradiation box, for 4-12h, wherein the ultraviolet irradiation box is a closed box body, and 1.5-3.5mg / m<3> of ozone is distributed in the ultraviolet irradiation box. The method has the advantages of safety, healthiness, no residual, no influences on the quality of the wolfberry fruits, no pollution to environment, low carbon, energy saving, easy combination with present wolfberry fruit processing technologies, easy realization of industrialization, and cost saving.

Description

technical field [0001] The invention relates to the technical field of degradation treatment of pesticide residues in wolfberry, in particular to a method for degrading two restricted pesticide residues in wolfberry, such as imidacloprid and acetamiprid, with ozone-assisted ultraviolet rays. Background technique [0002] Lycium barbarum is a kind of food and Chinese herbal medicine that is a special product of our country. Due to its extremely high medicinal value and health care effect, it occupies a large proportion in the Chinese medicine market and health care product market, accounting for more than 8% of the total export of Chinese herbal medicines in my country. It can be said that The international development prospect of Chinese wolfberry industry represents the prospect of Chinese herbal medicine products in the international competition to some extent. Lycium barbarum is easily polluted by pesticides, so there are pesticide residues in wolfberry and its products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20
Inventor 张荣刘洪智郭庆斌孙朝辉崔贵平李莉王玉花魏玉海雷占兰苏珊珊马菊秀戴达勇林童姚志敏
Owner 青海出入境检验检疫局综合技术中心
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