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Electrochemical sensor for rapidly measuring carmine and citrine and preparing method thereof

A rapid determination, carmine technology, applied in the direction of material electrochemical variables, etc., to achieve high sensitivity, high sensitivity determination, to meet the effect of rapid detection

Inactive Publication Date: 2015-01-28
广东省潮州市质量计量监督检测所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the simultaneous detection of carmine and tartrazine by electrochemical methods.

Method used

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  • Electrochemical sensor for rapidly measuring carmine and citrine and preparing method thereof
  • Electrochemical sensor for rapidly measuring carmine and citrine and preparing method thereof
  • Electrochemical sensor for rapidly measuring carmine and citrine and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] S1. Preparation of alumina material: Al(NO 3 ) 3 9H 2 O was dissolved in secondary water, then urea was added, the molar ratio of Al, urea, and water was 1:9:90, and then the obtained solution was transferred to a hydrothermal reaction kettle, and reacted in an oven at 100°C for 6 hours, and the solid obtained from the reaction was , washed with secondary water, suction filtered, dried in an oven at 80°C for 24 hours, and then put into a muffle furnace for calcination at 500°C for 2 hours to obtain an alumina material;

[0031] S2. Preparation of the sensor: Mix 0.1g of alumina material, 0.9g of graphite powder and 0.3mL of paraffin oil evenly to obtain a carbon paste, then press the carbon paste into the front cavity of the sensor housing, and finally grind and polish it on weighing paper , to prepare an electrochemical sensor for rapid determination of carmine and tartrazine.

Embodiment 2

[0033] S1. Preparation of alumina material: Al(NO 3 ) 3 9H 2 O was dissolved in secondary water, then urea was added, the molar ratio of Al, urea, and water was 1:9:90, and then the obtained solution was transferred to a hydrothermal reaction kettle, and reacted in an oven at 100°C for 9 hours, and the solid obtained from the reaction was , washed with secondary water, suction filtered, dried in an oven at 80°C for 24 hours, and then put into a muffle furnace for calcination at 500°C for 2 hours to obtain an alumina material;

[0034] S2. Preparation of the sensor: Mix 0.1g of alumina material, 0.9g of graphite powder and 0.3mL of paraffin oil evenly to obtain a carbon paste, then press the carbon paste into the front cavity of the sensor housing, and finally grind and polish it on weighing paper , to prepare an electrochemical sensor for rapid determination of carmine and tartrazine.

Embodiment 3

[0036] S1. Preparation of alumina material: Al(NO 3 ) 3 9H 2 O was dissolved in secondary water, then urea was added, the molar ratio of Al, urea, and water was 1:9:90, and then the obtained solution was transferred to a hydrothermal reaction kettle, and reacted in an oven at 100°C for 12 hours, and the solid obtained from the reaction was , washed with secondary water, suction filtered, dried in an oven at 80°C for 24 hours, and then put into a muffle furnace for calcination at 500°C for 2 hours to obtain an alumina material;

[0037] S2. Preparation of the sensor: Mix 0.1g of alumina material, 0.9g of graphite powder and 0.3mL of paraffin oil evenly to obtain a carbon paste, then press the carbon paste into the front cavity of the sensor housing, and finally grind and polish it on weighing paper , to prepare an electrochemical sensor for rapid determination of carmine and tartrazine.

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Abstract

The invention discloses an electrochemical sensor for rapidly measuring carmine and citrine. The electrochemical sensor at least comprises a carbon paste electrode, wherein the carbon paste electrode comprises a casing and a copper bar, and a cavity is formed in the front end of the casing and filled with carbon paste. The invention further provides a preparing method of the sensor. The preparing method comprises the following steps: S1, dissolving Al(NO3)3.9H2O in secondary water, then adding urea, transferring an obtained solution into a hydrothermal reactor, putting in an oven to react, washing and suction-filtering solids obtained by reaction with the secondary water, drying in the oven, then putting in a muffle furnace and forging to obtain an aluminum oxide material; S2, uniformly mixing the aluminum oxide material, graphite powder and paroline oil to obtain the carbon paste, then pressing the carbon paste into a cavity at the front end of the casing, and abrading and polishing on weighing paper to make the electrochemical sensor for rapidly measuring carmine and citrine. The made electrochemical sensor is simple and convenient to operate, has great environment-friendliness and high flexibility, does not require long-time enrichment and meets the requirements of rapid detection.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to an electrochemical sensor for rapid determination of carmine and tartrazine and a preparation method thereof. Background technique [0002] Synthetic pigments are widely used in the food industry to improve the appearance and color of food due to their uniform color, good water solubility, low cost, low microbial contamination and good stability to light, oxygen and pH. However, modern medical research has confirmed that many synthetic pigments are very harmful to the human body, and their dosage must be strictly controlled or even banned. Carmine and tartrazine are synthetic azo pigments, which are widely used as food coloring additives. They are bright in color and stable, but they are toxic to the human body, and excessive use will cause harm to humans. For example, recent research data show that tartrazine may cause allergies and asthma, and carmine toxicol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 刘贵深吴康兵徐思飞程芹陈旭明
Owner 广东省潮州市质量计量监督检测所
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