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Preparation method and application of an electrochemical sensor for rapid detection of Sudan red in food

A sensor and electrochemical technology, applied in the field of preparation of electrochemical sensors, can solve the problems of high technical difficulty, expensive equipment and complex processing technology, etc., to avoid environmental pollution, reduce detection costs, and improve sensitivity.

Active Publication Date: 2017-06-09
ZUNYI NORMAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Sudan red Ⅰ is a heavy azo chemical dye commonly used in the coloring of industrial products such as motor oil, car wax, and shoe polish. It is classified as a suspected carcinogen by the International Agency for Research on Cancer and has been banned from being used in food production and processing; Unscrupulous food manufacturers and businessmen use it as food coloring, which poses a major health threat to human diet. At the same time, because of the variety of food, the conditions of testing experiments are more stringent.
[0003] Currently, high-performance liquid chromatography and capillary electrophoresis are usually used to detect the content of Sudan I in food. However, these methods are difficult to be popularized and widely used due to expensive detection equipment, complicated processing technology, and technical difficulties. application

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  • Preparation method and application of an electrochemical sensor for rapid detection of Sudan red in food

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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, an electrochemical sensor for rapid detection of Sudan Red in food consists of electrode tube B, electrode material A and copper wire C installed inside electrode tube B

[0032] Its preparation method comprises the following steps:

[0033] (1) Preparation of nano-ferroferric oxide-graphene composite material: 80ml of graphene oxide aqueous solution with a concentration of 2.1mg / ml is placed in a 100ml beaker, and at normal temperature, it is 60r / min to carry out while stirring according to the stirring speed While adding ammonia water with a concentration of 30% drop by drop, and using pH test paper to test the pH value of the mixed solution in the beaker, when the pH value reaches 11, stop adding ammonia water; then use 1 / 5 times of the graphene oxide aqueous solution, And the ferrous ion solution with a concentration of 50.5mg / ml is added dropwise while stirring at a stirring speed of 60r / min. After the dropwise addition is completed, con...

Embodiment 2

[0041] Such as figure 1 Shown, a kind of electrochemical sensor of fast detection Sudan red in food, on the basis of embodiment 1, its preparation method comprises the following steps:

[0042](1) Preparation of nano-ferroferric oxide-graphene composite material: 50ml of graphene oxide aqueous solution with a concentration of 1.9mg / ml is placed in a 100ml beaker, and at room temperature, it is 40r / min according to the stirring speed while stirring Ammonia water with a concentration of 30% was added drop by drop, and the pH value of the mixed solution in the beaker was tested with pH test paper. When the pH value reached 11, the addition of ammonia water was stopped; And the ferrous ion solution with a concentration of 49.5mg / ml is added dropwise while stirring at a stirring speed of 40r / min. After the dropwise addition is completed, continue to stir at a constant speed for 1.5h, place it at room temperature, and let it stand for 20h. Centrifuge at a speed of 8000r / min for 25m...

Embodiment 3

[0050] Such as figure 1 Shown, a kind of preparation method of the electrochemical sensor of Sudan red in fast detection food, comprises the following steps:

[0051] (1) Preparation of nano-ferroferric oxide-graphene composite material: 65ml of graphene oxide aqueous solution with a concentration of 2mg / ml is placed in a 100ml beaker, and at normal temperature, it is 50r / min according to the stirring speed while stirring Dropwise add ammoniacal liquor with a concentration of 30%, and use pH test paper to test the pH value of the mixed solution in the beaker. When the pH value reaches 11, stop the addition of ammoniacal liquor; then use 1 / 8 of the graphene oxide aqueous solution, and The ferrous ion solution with a concentration of 50mg / ml is added dropwise while stirring at a stirring speed of 50r / min. After the dropwise addition is completed, continue to stir at a constant speed for 2h, place it at room temperature, and let it stand for 24h. Under the rotating speed of min,...

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Abstract

The invention relates to the technical field of electrochemical transducers, and in particular to a preparation method and application of an electrochemical transducer for fast detecting Sudan red in food. The method comprises the following steps: with nano ferroferric oxide-graphene material as an electrode material, ramming and loading the electrode material in an electrode tube, and inserting a copper wire to form the Sudan red electrochemical transducer. Therefore, the structure of a traditional Sudan red detector is simplified; in combination, with the application in chilli products, the sensitivity of the electrochemical transducer is improved by reasonably combining the electrode raw materials while controlling technical parameters in the detection step, so that the reliability of the Sudan red content detection result is improved, the cost of detection on the content of Sudan red in food is reduced, and the influence of food subjected to environment pollution and polluted by lawless persons to the human body health can be avoided.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to a preparation method and application of an electrochemical sensor for rapidly detecting Sudan red in food. Background technique [0002] Sudan red Ⅰ is a heavy azo chemical dye commonly used in the coloring of industrial products such as motor oil, car wax, and shoe polish. It is classified as a suspected carcinogen by the International Agency for Research on Cancer and has been banned from being used in food production and processing; Unscrupulous food manufacturers and businessmen use it as food pigment, which poses a major health threat to human diet. At the same time, because of the variety of food types, the conditions for testing experiments are more stringent. [0003] Currently, high-performance liquid chromatography and capillary electrophoresis are usually used to detect the content of Sudan I in food. However, these methods are difficult to be populariz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26G01N27/48
Inventor 伍远辉罗宿星
Owner ZUNYI NORMAL COLLEGE
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