Sample pretreatment method for tea leaf pesticide residue detection and tea leaf purification column

A sample pretreatment and pesticide residue technology, which is applied in the field of agricultural product safety testing and food hygiene, can solve problems such as complex tea ingredients, and achieve the effects of saving experimental operation time, simplifying economic and manual operation costs

Inactive Publication Date: 2012-07-25
天津博纳艾杰尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon traditional ways for removing harmful substances from food crops by combining various techniques like filtration or absorbing them onto special surfaces before analysis. It allows us to select suitable filters based on their ability to absorb these contaminants effectively without significantly impairing any beneficial qualities associated therewith (like taste). Additionally, this new design helps reduce cost compared to current approaches while still maintaining good results.

Problems solved by technology

This patented technical solution described in this patent allows for precise identification of different types of pesciding agents found within various food products like tea leaves without complicated operations.

Method used

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  • Sample pretreatment method for tea leaf pesticide residue detection and tea leaf purification column
  • Sample pretreatment method for tea leaf pesticide residue detection and tea leaf purification column

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A tea purification column is prepared by a method comprising the following steps:

[0059] Use a high-density polyethylene column tube with a volume capacity of 6mL or 12mL, which is filled with graphitized carbon, aminated silica gel NH2, and amidated polyethylene divinylbenzene, among which aminated silica gel NH2 and amidated polyethylene divinylbenzene Mixed as a layer, graphitized carbon as a layer, a polypropylene sieve plate with a pore size of 20um is used as a separation, and a two-layer mixed purification column of three materials is used. In the tea purification column, graphitized carbon, aminated silica gel NH2 and The mass ratio of the three amidated polyethylene divinylbenzene materials is 8:8:1, and the graphitized carbon is packed in the bottom layer of the column tube.

Embodiment 2

[0061] A tea purification column is prepared by a method comprising the following steps:

[0062] Use a high-density polyethylene column tube with a volume capacity of 6mL or 12mL, which is filled with graphitized carbon, aminated silica gel NH2, and amidated polyethylene divinylbenzene, among which aminated silica gel NH2 and amidated polyethylene divinylbenzene Mixed as a layer, graphitized carbon as a layer, a polypropylene sieve plate with a pore size of 20um is used as a separation, and a two-layer mixed purification column of three materials is used. In the tea purification column, graphitized carbon, aminated silica gel NH2 and The mass ratio of the three materials of amidated polyethylene divinyl benzene is 6:4:1, and the graphitized carbon is packed at the bottom of the column tube.

Embodiment 3

[0064] A tea purification column is prepared by a method comprising the following steps:

[0065] Use a high-density polyethylene column tube with a volume capacity of 6mL or 12mL, which is filled with graphitized carbon, aminated silica gel NH2, and amidated polyethylene divinylbenzene, among which aminated silica gel NH2 and amidated polyethylene divinylbenzene Mixed as a layer, graphitized carbon as a layer, a polypropylene sieve plate with a pore size of 20um is used as a separation, and a two-layer mixed purification column of three materials is used. In the tea purification column, graphitized carbon, aminated silica gel NH2 and The mass ratio of the three materials of amidated polyethylene divinylbenzene is 5:4:1, and the graphitized carbon is packed at the bottom of the column tube.

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Abstract

The invention relates to a sample pretreatment method for tea leaf pesticide residue detection. The invention relates to a tea leaf purification adsorbing material, which is used for adsorbing main matrices of tea leaf samples in the sample pretreatment process for tea leaf pesticide residue detection. The tea leaf purification adsorbing material is characterized in that the tea leaf purification adsorbing material comprises a carbon material, an amino functionalized absorbing material and a polar functional group modified high polymer material. The invention additionally provides a tea leaf purification column. The tea leaf purification column comprises a column pipe and fillers in the column pipe, wherein the fillers are the tea leaf purification absorbing materials. The sample pretreatment method and the tea leaf purification column can be used for the detection of pesticide residues in all kinds of tea leaf raw materials, tea leaf finished products, tea leaf secondary processed products and the like.

Description

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Claims

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Application Information

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Owner 天津博纳艾杰尔科技有限公司
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