A graphene oxide-based pretreatment device and its application in food testing

A graphene-based food testing technology, which is applied in the preparation of test samples, test food, material inspection products, etc., can solve the problems of special substances requiring additional operations, and the analysis results of adsorption materials are inconsistent, so as to improve efficiency and improve processing steps. simple effect

Active Publication Date: 2022-01-04
CHONGQING UNIV OF EDUCATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention provides a graphene oxide-based pretreatment device, which solves the problems in the prior art that pretreatment of food samples often requires operations such as elution, different adsorption materials have inconsistent analysis effects, and additional operations are required for special substances.

Method used

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  • A graphene oxide-based pretreatment device and its application in food testing
  • A graphene oxide-based pretreatment device and its application in food testing

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Experimental program
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Embodiment 1

[0040] Such as Figure 1~2 , the present embodiment proposes a graphene oxide-based pretreatment device, including a base plate and a sealed box 3 detachably mounted on the base plate; the upper and lower ends of the sealed box 3 are respectively provided with a first electromagnet 1 and a second electromagnet 9 The sealing box 3 is provided with an upward sample pool 4, and some plexiglass tubes 6 are vertically arranged in the sample pool 4, and the plexiglass tube 6 lower ends are positioned in the sample pool 4, and the plexiglass tube 6 upper ends stretch out from the sample pool 4 Outside the open end of the upper end, the inner wall of the plexiglass tube 6 is covered with a graphene oxide layer 7;

[0041] Also includes the installation cover 5, the opening end of the installation cover 5 is fastened with the opening end of the sample pool 4, the area of ​​the inner top surface of the installation cover 5 covers the opening end of the sample pool 4, and the top surface...

Embodiment 2

[0056] The present embodiment except the following content, all the other parts are identical with embodiment 1; The difference is:

[0057] This embodiment provides the method of using the above-mentioned device for the detection of acrylamide in fried food, by weight, the steps are as follows:

[0058] S1 crushed 4 g of commercially available shrimp crackers, added 16 ml of pure water and 24 ml of mineral oil (liquid paraffin), stirred magnetically for 15 min, and filtered to obtain a filling liquid-water mixture;

[0059] S2 Transfer the filling liquid-water mixture in S1 into the sample cell 4, evenly cover the bottom of the sample cell 4, fasten the installation cover 5 on the sample cell 4, install the sealing box 3, and then open the first electromagnet 1 and the second electromagnet at the same time The battery pack 2 of the second electromagnet 9, adjust the battery pack 2 to make the first electromagnet 1 attractive force greater than the second electromagnet 9;

[...

Embodiment 3

[0064] The present embodiment except the following content, all the other parts are identical with embodiment 1; The difference is:

[0065] This embodiment provides the method of using the above-mentioned device for the detection of acrylamide in fried food, by weight, the steps are as follows:

[0066] S1 Add 25ml of pure water and 35ml of carbon tetrachloride to 5g of a commercially available coffee sample, stir magnetically for 20min, and filter to obtain a filling liquid-water mixture;

[0067] S2 Transfer the filling liquid-water mixture in S1 into the sample cell 4, evenly cover the bottom of the sample cell 4, fasten the installation cover 5 on the sample cell 4, install the sealing box 3, and then open the first electromagnet 1 and the second electromagnet at the same time The battery pack 2 of the second electromagnet 9, adjust the battery pack 2 to make the first electromagnet 1 attractive force greater than the second electromagnet 9;

[0068] S3 When the liquid l...

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Abstract

The invention provides a graphene oxide-based pretreatment device and its application in food testing. The device includes a first electromagnet, a second electromagnet, a sealed box, a sample pool, an installation cover and several plexiglass tubes. Beneficial effects: the processing steps are simple, no sample elution and other operations are required, and multiple plexiglass tubes are used to improve the enrichment efficiency; it is suitable for the analysis and detection of water-soluble substances in food, and no additional operations are required for special substances; analysis The results will not be different due to different materials; use the thin film properties of graphene oxide to coat it on the plexiglass tube, and then use its strong hydrophilicity to efficiently achieve the separation and enrichment of the analytes; use plexiglass The tube is used as a carrier, and the graphene oxide layer is attached. The graphene oxide layer has a certain strength of mechanical properties, and the hydrophilicity of the graphene oxide layer will help the plexiglass tube absorb water from the filling liquid-water mixture, and then achieve The purpose of separating the substances to be detected.

Description

technical field [0001] The invention relates to the field of food analysis and detection auxiliary devices, in particular to a graphene oxide-based pretreatment device and its application in food detection. Background technique [0002] Food analysis and testing, especially the analysis and testing of harmful substances in it, is especially important for the current increasingly severe food safety situation. For food analysis and testing, sample pretreatment is the core. [0003] The pretreatment of food samples generally uses solid phase extraction (SPE), liquid phase microextraction (LPME), solid phase microextraction (SPME) and magnetic separation techniques. Among them, SPE, LPME and SPME are conventional processing technologies. SPE is based on the liquid chromatography separation principle of selectively adsorbing target substances and eluting impurity molecules, which can effectively reduce complex matrix interference and improve the sensitivity and accuracy of fast ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N33/02
CPCG01N1/28G01N33/02
Inventor 邹晓川赵欣王跃聂旭元
Owner CHONGQING UNIV OF EDUCATION
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