Method for detecting carmine in food by using graphene-loaded Pt single-atom composite material

A technology of composite materials and graphene, which is applied in the direction of analyzing materials, electrochemical variables of materials, and material analysis through electromagnetic means, can solve the problems of high genotoxicity, cytotoxicity, carcinogenicity, etc., and achieve the improvement of electrocatalytic oxidation performance and high efficiency. The effect of dispersing and speeding up the transfer rate

Inactive Publication Date: 2017-05-10
TAIYUAN UNIV OF TECH
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Problems solved by technology

However, long-term excessive consumption of azo-based synthetic coloring agents by adults or children may cause high genotoxicity and

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  • Method for detecting carmine in food by using graphene-loaded Pt single-atom composite material
  • Method for detecting carmine in food by using graphene-loaded Pt single-atom composite material

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[0017] The present invention will now be described in further detail with reference to the accompanying drawings and the following embodiments, but it should be understood that these embodiments are for illustrative purposes only and should not be interpreted as limitations to the implementation of the present invention.

[0018] In this embodiment, the steps of the method for detecting the concentration of carmine by using the graphene-loaded Pt monoatomic composite material are as follows:

[0019] (1) Preparation of graphene-supported Pt monoatomic composite material

[0020] First prepare a chloroplatinic acid solution with a concentration of 0.00002mol / L, and add it to the tank of the underwater arc discharge device; use spectral pure graphite rods with cathode and anode diameters of 30mm and 8mm respectively as electrodes, and the two electrodes are along a horizontal line Arranged and immersed in the arc discharge device 30mm below the liquid surface; adjust the current and vo...

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Abstract

The invention relates to a method for detecting carmine in a food by using a graphene-loaded Pt single-atom composite material, and belongs to the field of electrochemical analysis detection technology or food safety. The graphene-loaded Pt single-atom composite material is prepared by mainly adopting an underwater liquid medium plasma arc discharge method, and the graphene-loaded Pt single-atom composite material is applied to electrochemical detection of the carmine. The prepared graphene-loaded Pt single-atom composite material is dispersed into high-purity water and is subjected to ultrasonic treatment for half an hour to prepare a dispersion liquid; the graphene-loaded Pt single-atom (GN/Pt1) dispersion liquid are dispensed on the clean GCE surface and are dried under an infrared lamp to obtain GN/Pt1/GCE. Fast detection is carried out by using the electrochemical catalysis action of the GN/Pt1/GCE on the carmine through a square wave stripping voltammetry. The method has the advantages of being fast, good in selectivity, and high in sensitivity.

Description

technical field [0001] The invention relates to the field of electrochemical analysis and testing technology or food safety, in particular to a method for detecting carmine in food by electrochemical means using graphene-loaded Pt single-atom composite materials as electrode modification materials. Background technique [0002] Carmine (E124) belongs to the azo pigments. Because of its bright color, it is often added to beverages, desserts, fruit peels, wine and other foods in order to arouse consumers' consumption desires. According to news reports, in 2010 Chongqing seized a large number of unqualified canned products, and it is reported that it was due to excessive addition of carmine and other pigments. However, long-term excessive consumption of azo-based synthetic coloring agents by adults or children may cause high genotoxicity and cytotoxicity, and even the risk of cancer. National laws and relevant regulations have strictly limited the amount of carmine in food . ...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 王美玲郭俊杰赵敏宋艳慧闫晓丽侯莹韩丹
Owner TAIYUAN UNIV OF TECH
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