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Preparation methods and rapid detection device of nitrite detection electrode and chemical oxygen demand detection electrode

A chemical oxygen consumption and nitrite technology, applied in the direction of electrochemical variables of materials, can solve the problems of insufficient accuracy, high detection cost, difficulty, etc., to reduce the recombination rate, high detection accuracy and reduce mass transfer resistance. Effect

Active Publication Date: 2018-09-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims at the problem that the detection method of nitrate and chemical oxygen consumption in the prior art is either not accurate enough, or the detection cost is high and it is difficult to realize rapid and on-site detection, and provides a nitrite detection electrode and chemical oxygen consumption Preparation method and rapid detection device of oxygen amount detection electrode

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  • Preparation methods and rapid detection device of nitrite detection electrode and chemical oxygen demand detection electrode
  • Preparation methods and rapid detection device of nitrite detection electrode and chemical oxygen demand detection electrode
  • Preparation methods and rapid detection device of nitrite detection electrode and chemical oxygen demand detection electrode

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Embodiment 1

[0031] The preparation method of a kind of nitrite detection electrode of the present invention comprises the steps: first deposit Fe by hydrothermal method on FTO glass 2 o 3 The nanowires are further modified with gold nanoparticles by a solution method to obtain the nitrite detection electrode 3, and the particle size of the gold nanoparticles on the surface of the nitrite detection electrode 3 is 3nm.

[0032] A preparation method of a chemical oxygen consumption detection electrode of the present invention comprises the following steps: first, anatase phase TiO with a particle size of 5 nm is synthesized and prepared 2 Nanoparticles; Then select 0.1g of the anatase phase TiO 2 Nanoparticles were dispersed into a water-alcohol solution with a ratio of 4:1; then, after adding 150 μL of membrane solution, ultrasonic pump was used for 3 minutes to obtain an emulsion, which was passed through a puller on FTO glass at 2 cm / The thin film was obtained at a pulling speed of min...

Embodiment 2

[0036] The preparation method of a kind of nitrite detection electrode of the present invention comprises the steps: first deposit Fe by hydrothermal method on FTO glass 2 o 3 The nanowires are further modified with gold nanoparticles by a solution method to obtain the nitrite detection electrode 3, and the particle size of the gold nanoparticles on the surface of the nitrite detection electrode 3 is 4nm.

[0037] A preparation method of a chemical oxygen consumption detection electrode of the present invention comprises the following steps: first, anatase phase TiO with a particle size of 7 nm is synthesized and prepared 2 Nanoparticles; Then select 0.1g of the anatase phase TiO 2 Nanoparticles were dispersed into a water-alcohol solution with a ratio of 4:1; then, after adding 150 μL of membrane solution, ultrasonic pump was used for 3 minutes to obtain an emulsion, which was passed through a puller on FTO glass at 2 cm / The thin film was obtained at a pulling speed of min...

Embodiment 3

[0041] The preparation method of a kind of nitrite detection electrode of the present invention comprises the steps: first deposit Fe by hydrothermal method on FTO glass 2 o 3 The nanowires are further modified with gold nanoparticles by a solution method to obtain the nitrite detection electrode 3, and the diameter of the gold nanoparticles on the surface of the nitrite detection electrode 3 is 5nm.

[0042] A preparation method of a chemical oxygen consumption detection electrode of the present invention comprises the following steps: first, anatase phase TiO with a particle size of 10 nm is synthesized and prepared 2 Nanoparticles; Then select 0.1g of the anatase phase TiO 2 Nanoparticles were dispersed into a water-alcohol solution with a ratio of 4:1; then, after adding 150 μL of membrane solution, ultrasonic pump was used for 3 minutes to obtain an emulsion, which was passed through a puller on FTO glass at 2 cm / The thin film was obtained at a pulling speed of min; fi...

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Abstract

The invention belongs to the field of detection equipment and discloses preparation methods and rapid detection device of a nitrite detection electrode and a chemical oxygen demand detection electrode. The nitrite detection electrode, the chemical oxygen demand detection electrode, a reference electrode, a counter electrode, a light source and a stirring paddle are arranged in a sample pool; the nitrite detection electrode and the chemical oxygen demand detection electrode are connected with an electrochemical workstation; the reference electrode, the counter electrode and the electrochemicalworkstation are connected; the light source is connected in series with a direct current power supply; the stirring paddle is driven to operate by a micro motor; the micro motor is connected in serieswith the direct current power supply; the electrochemical workstation is connected with a USB (Universal Serial Bus) driving module in a portable computer; the portable computer further comprises a nitrite analysis module, a chemical oxygen demand analysis module and an alarm system. The device disclosed by the invention is rapid in detection result and high in detection accuracy, can detect nitrite detection content and a chemical oxygen demand of one piece of samples, and can be widely applied to rapid field detection in the food field and the environment field.

Description

technical field [0001] The invention relates to the technical field of detection equipment, in particular to a preparation method and a rapid detection device of a nitrite detection electrode and a chemical oxygen consumption detection electrode. Background technique [0002] Nitrite widely exists in the natural environment and food, and nitrous acid in food mainly exists in dyes and additives, cured meat products, pickles and spoiled vegetables. Long-term consumption of large amounts of nitrite not only has adverse effects on human health, but can even cause various diseases, such as baby distortion, cyanosis, growth defects, etc. This is mainly because nitrite can oxidize the normal oxygen-carrying low iron hemoglobin in the blood into methemoglobin, thus losing the oxygen-carrying capacity and causing tissue hypoxia, so nitrite is a highly toxic substance. In addition, nitrite is also a carcinogen. According to research, the probability of suffering from esophageal cance...

Claims

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Application Information

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IPC IPC(8): G01N27/27
CPCG01N27/27
Inventor 康升红蔡伟平汪国忠周宏建张海民张云霞
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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