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Sensor electrode for detecting hydrogen peroxide in food processing as well as preparation method thereof

A technology of sensor electrodes and hydrogen peroxide, which is applied in the direction of material analysis, instruments, and measuring devices through electromagnetic means, can solve the problems of high cost of instrument analysis methods, difficult on-site monitoring, and complicated operations, so as to improve electron transfer speed, Shorten the path, good selectivity effect

Inactive Publication Date: 2018-11-13
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of these methods such as low sensitivity, complicated operation, high cost of instrumental analysis methods, and difficulty in on-site monitoring, a trace H 2 o 2 The rapid determination method is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 0.06 g of carbon nanotubes purified by nitric acid into 2 mL and 0.02 g / mL polyethylene glycol, sonicate for 15 min, then add 100 mL and 0.1 mol·L -1 copper sulfate solution and 100mL, 0.1 mol·L -1 glucose solution, the mixed solution was sonicated for 30 min, transferred to a constant temperature water bath and heated to 60°C, and prepared with 50 mL, 2 mol L -1 NaOH solution, slowly dripped into the mixed solution and kept stirring, reacted for 0.5h, washed and dried, then dispersed in ethanol, ultrasonically obtained the carbon nanotube / cuprous oxide composite material suspension, and sucked 3 micron 1 liter of the suspension was placed on the surface of the glassy carbon electrode, and after cooling naturally at room temperature, a carbon nanotube / cuprous oxide composite material modified glassy carbon electrode was obtained. At room temperature, N was introduced into the electrolytic cell 2 For 20 minutes, immerse the carbon nanotube / cuprous oxide composit...

Embodiment 2

[0020] Add 0.06 g of carbon nanotubes purified by nitric acid into 2 mL of 0.03 g / mL polyethylene glycol, sonicate for 15 min, then add 100 mL of 0.2 M copper sulfate solution and 100 mL of 0.2 mol L -1 glucose solution, the mixed solution was sonicated for 30 min, then transferred to a constant temperature water bath and heated to 60°C, and 50 mL, 4 mol L -1 NaOH solution, slowly dripped into the mixed solution and kept stirring, reacted for 0.7h, washed and dried, then dispersed in ethanol, ultrasonically obtained the carbon nanotube / cuprous oxide composite material suspension, and sucked 3 micron 1 liter of the suspension was placed on the surface of the glassy carbon electrode, and after cooling naturally at room temperature, a carbon nanotube / cuprous oxide composite material modified glassy carbon electrode was obtained. At room temperature, N was introduced into the electrolytic cell 2 For 20 minutes, the carbon nanotube / cuprous oxide composite modified glassy carbon...

Embodiment 3

[0022] Add 0.08 g of carbon nanotubes purified by nitric acid into 2 mL and 0.05 g / mL polyethylene glycol, sonicate for 15 min, then add 100 mL and 0.3 mol·L -1 copper sulfate solution and 100mL, 0.3 mol·L -1 glucose solution, the mixed solution was sonicated for 30 min, transferred to a constant temperature water bath and heated to 80°C, and prepared with 50 mL, 4 mol L -1 NaOH solution, slowly drop into the mixed solution and keep stirring, react for 0.8h, wash and dry, then disperse in ethanol, obtain the suspension of the carbon nanotube / cuprous oxide composite material by ultrasonic, use a micro-syringe to draw 4 μg 1 liter of the suspension was placed on the surface of the glassy carbon electrode, and after cooling naturally at room temperature, a carbon nanotube / cuprous oxide composite material modified glassy carbon electrode was obtained. At room temperature, N was introduced into the electrolytic cell 2 For 30 minutes, immerse the carbon nanotube / cuprous oxide c...

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PUM

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Abstract

The invention discloses a sensor electrode for detecting hydrogen peroxide in food processing as well as a preparation method thereof. The preparation method comprises the following steps: preparing carbon nanotube / coprous oxide composite material suspension liquid; adding the suspension liquid on an electrode dropwise to obtain a carbon nanotube / coprous oxide composite material modified electrode; and loading gold nanoparticles on the carbon nanotube / coprous oxide composite material layer by an electrochemical deposition method to obtain a hydrogen peroxide electrochemical sensor. The electrochemical sensor is applied to detection of the hydrogen peroxide; and the prepared electrochemical sensor has very high response sensitivity on the hydrogen peroxide at room temperature and can be widely applied in the fields of accurate measurement and control of low-concentration hydrogen peroxide in the industrial and agricultural production process and in the atmosphere environment. The invention also provides application of the gas sensor. The electrochemical sensor has the advantages of simplicity and convenience in preparation, low cost and the like, and is suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of electrochemical analysis and testing, in particular to a sensor electrode for detecting hydrogen peroxide in food processing and a preparation method thereof. Background technique [0002] hydrogen peroxide (H 2 o 2 ) has strong oxidizing properties, and is widely used in food hygiene, environmental protection, textile, chemical and other fields as an efficient disinfectant and bleaching agent, but H 2 o 2 Excessive residues will cause serious harm to human health and the ecological environment, such as oxidizing human cells to accelerate aging, causing human genetic material to mutate or gene mutation; promoting the formation of acid rain and seriously destroying vegetation; causing fish and shrimp deaths and causing serious damage to the aquaculture industry. serious loss etc. Therefore for H 2 o 2 It is particularly important to perform accurate, rapid and sensitive detection. [0003] Currently...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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