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Method for detecting sunset yellow in food

A detection method and technology of sunset yellow, applied in measurement devices, instruments, material analysis by electromagnetic means, etc., can solve the problems of poor conductivity, excess, affecting RGO, etc., and achieve the effect of good detection effect, low cost and simple operation.

Active Publication Date: 2017-04-26
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, although the addition of these dispersants improves the dispersibility of RGO, their introduction is redundant in many applications, and may even affect the performance of some functions of RGO, resulting in defects such as poor electrical conductivity.

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  • Method for detecting sunset yellow in food
  • Method for detecting sunset yellow in food
  • Method for detecting sunset yellow in food

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Embodiment Construction

[0019] The present invention will now be further described in detail with reference to the accompanying drawings and the following examples, but it should be understood that these examples are for illustrative purposes only, and should not be construed as limitations on the implementation of the present invention.

[0020] In the present embodiment, the determination method steps of using IL-βCD-RGO composite material to detect sunset yellow concentration are as follows:

[0021] (1) Synthesis of ionic liquid-β-cyclodextrin-reduced graphene oxide

[0022] Graphite oxide GO was prepared by the Hummer method. First, a solution of 10 mL graphite oxide GO (0.5 mg / mL) and 10 mL βCD (3 g) was ultrasonically mixed for 30 min; then, under constant stirring, the above uniform solution of GO and βCD was slowly added dropwise at 120 °C Into 10 g of butyltrimethylimidazolium hexafluorophosphate, the whole stirring process was continued at 120° C. for 2 hours. The experiment found that t...

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Abstract

A novel IL-betaCD-RGO compound is synthesized through functionally reducing graphene oxide through in situ thermal reduction of graphite oxide by using an ionic liquid (IL) in the presence of betacyclodextrin. The dispersed RGO has good dispersion; and compared with betaCD individually functionalized RGO, the novel IL-betaCD-RGO compound has the advantages of obviously better dispersion of the RGO in water and substantially improved integral electric conductivity due to the introduction of the IL. The method is simple to operate, and is mild and green. The IL-betaCD-RGO compound combines the large specific surface area of the RGO, the high electric conductivity of the IL and the clathration effect of the betaCD on sunset yellow pigment molecules. A dispersion of the compound is dispensed on the surface of a glassy carbon electrode to produce an IL-betaCD-RGO compound modified glassy carbon electrode, so the dispersion is successfully applied to electrochemical detection of the dispensing in the food.

Description

technical field [0001] The invention relates to the field of electrochemical analysis and testing. Specifically, in the presence of β-cyclodextrin, the functionalized reduced graphene oxide (RGO) is synthesized by using ionic liquid (IL) to thermally reduce graphite oxide (GO) in situ. A new type of IL-βCD-RGO complex was developed; and the IL-βCD-RGO composite material was further proposed as an electrode modification material for the electrochemical detection of sunset yellow in food. Background technique [0002] At present, the synthesis methods of RGO mainly include microwave mechanical glass core method, substrate epitaxial growth method and chemical redox method. Among them, the wet chemical strategy is the most suitable method for preparing RGO in large quantities. However, poor water solubility is a major drawback limiting the application of RGO. Scientists currently propose to solve this problem by compounding other substances such as surfactants, polymer polysty...

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Application Information

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IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/308G01N27/48
Inventor 王美玲崔明珠韩丹
Owner TAIYUAN UNIV OF TECH
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