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Pretreatment device for graphene oxide and application of pretreatment device to food detection

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

Active Publication Date: 2018-11-06
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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  • Pretreatment device for graphene oxide and application of pretreatment device to food detection
  • Pretreatment device for graphene oxide and application of pretreatment device to food detection

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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 pretreatment device for graphene oxide and an application of the pretreatment device to food detection. The device comprises a first electromagnet, a second electromagnet, a sealing box, a sample pool, a mounting cover and a plurality of organic glass tubes. The device has beneficial effects as follows: the treatment steps are simple, sample eluting operation is not needed, and the enrichment efficiency is improved by adopting the multiple organic glass tubes; the device is applicable to analytic detection for water-soluble substances in food, and additional operationis not required for special substances; an analysis result cannot be different due to difference of materials; by means of thin film property of graphene oxide, graphene oxide is applied to the organic glass tubes, and on the basis of strong hydrophility of graphene oxide, to-be-detected substances are efficiently separated and enriched; the organic glass tubes are adopted as carriers, a grapheneoxide layer is attached to the carriers and has mechanical property with certain strength, the hydrophility of the graphene oxide layer contributes to water suction of the organic glass tubes from a filling fluid-water mixture, and the to-be-detected substances are separated from samples.

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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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