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All-solid-state carbonate ion selective electrode and manufacture method of all-solid-state carbonate ion selective electrode

A carbonate ion, all-solid-state technology, used in material analysis, measuring devices, instruments, etc. by electromagnetic means, can solve problems such as affecting the equilibrium concentration of carbonate ions in water bodies, and avoid changes in carbonate ion concentration and small volume. , the effect of good working performance

Inactive Publication Date: 2011-08-17
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the content of carbonate ions in seawater is usually calculated based on parameters such as the pH value and alkalinity of the water body or dissolved inorganic carbon, because most of the analysis methods in the laboratory are difficult to overcome the CO caused by the pressure change during the sampling process. 2 Volatilization or absorption, which further affects the equilibrium concentration of carbonate ions in the water body

Method used

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preparation example Construction

[0017] The steps of the preparation method of the all-solid-state carbonate ion selective electrode are as follows:

[0018] 1) Immerse the lower part of the metal wire 1 into the corundum sand suspension, use ultrasonic vibration to polish for 10-15 minutes, soak in 0.5-2 mol / L dilute HCl solution for 3-5 minutes, rinse with deionized water, and use surfactant Aqueous solution cleaning, drying at 60-80°C, the suspension of corundum sand is a suspension containing 0.2-1.2 grams of corundum sand per 50 milliliters of deionized water;

[0019] 2) Prepare conductive polymer and deionized water volume ratio of 1.0-5.0% suspension, add 0.01-0.1% treatment agent and 1.5-5.0% sodium carboxymethylcellulose or hydroxyethyl cellulose Sodium cellulose is formulated into an electrolyte slurry, and the electrolyte slurry is coated on the surface of the metal wire treated in step 1) to form a solid electrolyte layer 2;

[0020] 3) Dissolve carbonate ionophores, lipophilic macromolecules, a...

Embodiment 1

[0024] 1) Dip one end of a gold wire with a diameter of 0.2 mm into a corundum sand suspension with a mass fraction of 1%, use ultrasonic vibration for 15 minutes, soak in 1 mol / L dilute HCl solution for 5 minutes, rinse with deionized water and use 0.3 % sodium carboxymethyl cellulose solution to clean the gold wire, and place it in an oven to dry at 60°C;

[0025] 2) Disperse polyoxyethylene thiophene / polystyrene sulfonic acid in water to form a 1% suspension, add 0.03% polyethylene glycol isooctyl ether and 2% carboxymethyl fiber to the suspension Sodium plain or hydroxyethyl cellulose sodium is formulated into electrolyte slurry, which is coated on the surface of the pretreated gold wire to form a solid electrolyte layer with a thickness of about 15 microns;

[0026] 3) Add 16 mg of N,N-dioctyl-3α,12α-bis(4-trifluoroacetylbenzoyl)-5?-deoxycholic acid-24-amide, 5 mg of tri-dodecyl After mixing methylammonium chloride and 90 mg of nitrophenyl octyl ether, shake and mix for ...

Embodiment 2

[0028] 1) Dip one end of a gold wire with a diameter of 0.25mm into corundum sand suspension with a mass fraction of 2%, use ultrasonic vibration for 15 minutes, soak in 1 mol / L dilute HCl solution for 5 minutes, rinse with deionized water and use 0.3 % sodium carboxymethyl cellulose solution to clean the gold wire, and place it in an oven to dry at 80°C;

[0029] 2) Disperse polyoxyethylene thiophene / polystyrene sulfonic acid in water to form a 1% suspension, add 0.05% polyethylene glycol isooctyl ether and 3.0% carboxymethyl fiber to the suspension Sodium plain or hydroxyethyl cellulose sodium is formulated into electrolyte slurry, which is coated on the surface of the pretreated gold wire to form a solid electrolyte layer with a thickness of about 15 microns;

[0030]3) Add 17 mg of N,N-dioctyl-3α,12α-bis(4-trifluoroacetylbenzoyl)-5?-deoxycholic acid-24-amide, 3 mg of tri-dodecyl After mixing methylammonium chloride and 93 mg of bis(2-ethylhexyl) adipic acid, shake and mix...

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Abstract

The invention discloses an all-solid-state carbonate ion selective electrode and a manufacture method of the all-solid-state carbonate ion selective electrode. The all-solid-state carbonate ion selective electrode comprises a metal wire, solid electrolyte, a carbonate ion sensitive film and a heat shrinking tube. The solid electrolyte is covered on the metal wire; the carbonate ion sensitive filmis covered on the solid electrolyte layer; and the heat shrinking tube is covered on the part of the metal wire, where is not covered with the carbonate ion sensitive film. The invention also discloses a manufacture method and a calibration method of the all-solid-state carbonate ion selective electrode; the solid electrolyte and the carbonate ion sensitive film are coated on the surface of the metal wire in layers by a coating method; and the concentration of the carbonate ions in the solution can be detected fast and accurately by pairing the selective electrode and an external reference electrode. The exploring electrode provided by the invention has quite high mechanical strength and toughness, has the characteristics of small volume, convenience in carrying and operation, fast response and low manufacture cost, and is suitable for online detecting and long term monitoring the contents of carbonate ions in natural water, chemical and chemical industrial water mediums.

Description

technical field [0001] The invention relates to an electrochemical sensor, in particular to an electrode for detecting the content of carbonate ions in water and a preparation method thereof. Background technique [0002] The content of carbonate ions in water is an important parameter for environmental assessment, and it is of great significance for understanding the activities of aquatic organisms and microorganisms, as well as the carbon cycle between the hydrosphere and the atmosphere. At present, the content of carbonate ions in seawater is usually calculated based on parameters such as the pH value and alkalinity of the water body or dissolved inorganic carbon, because most of the analysis methods in the laboratory are difficult to overcome the CO caused by the pressure change during the sampling process. 2 Volatilization or absorption, which further affects the equilibrium concentration of carbonate ions in the water. Although the indirect calculation compensates for...

Claims

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Application Information

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IPC IPC(8): G01N27/333
Inventor 叶瑛韩沉花徐惠潘依雯丁茜陈鹰
Owner ZHEJIANG UNIV
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