COD electrochemical analyzers

A technology of electrochemical analysis and chemical oxygen demand, which is applied in the field of analytical chemistry and sensors, can solve the problems of poor accuracy of measurement results, secondary pollution, long digestion time, etc., and achieve the effects of accurate detection, convenient processing, and improved sensitivity

Inactive Publication Date: 2005-07-27
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

These methods only improved the traditional methods in terms of detection methods, but there are still proble

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  • COD electrochemical analyzers

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Embodiment Construction

[0018] The structure and working process thereof of the chemical oxygen demand electrochemical analyzer provided by the present invention are described in detail below in conjunction with the accompanying drawings:

[0019] The chemical oxygen demand electrochemical analyzer provided by the invention includes a flow injection sampling system, an analysis and detection system and a data processing system. The flow injection sampling system is composed of a constant flow peristaltic pump and a micro-sampler; the data processing system is composed of a CHI electrochemical workstation and a computer. The electrical signal generated on the surface of the working electrode is collected and amplified, and the signal is processed and analyzed by a computer to finally obtain the chemical oxygen demand (COD) value of the water sample. The analysis and detection system includes a working electrode 1, an auxiliary electrode 2, a reference electrode 3, an inlet pipe 4, an outlet pipe 5, an...

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Abstract

An electrochemical analyser of chemical oxygen demand is composed of sample feeding system of flowing injection mode analysing and detecting device, as well as data processing system. The analysing and detecting device applies three electrodes electrochemical system including operation electrode, reference electrode, inlet and outlet tube, top cover, bottom cover, and teflon film setting between two covers and having a notch at middle to form detection cell.

Description

technical field [0001] The invention relates to an analytical instrument for quickly detecting the chemical oxygen demand of water body, in particular to a detection device for rapidly measuring the chemical oxygen demand of water body by adopting electrochemical amperometry detection technology, which belongs to the field of analytical chemistry and sensor technology. Background technique [0002] Chemical Oxygen Demand (hereinafter referred to as COD) is the measurement of strong oxidants in water, such as Cr 2 o 7 2- , MnO 4 - The equivalent of oxygen required for the oxidation of an oxidized organic substance. Commonly used COD detection methods include permanganate index method and potassium dichromate oxidation method, so most of the instruments used to measure COD are those used in conventional titration analysis. In addition to the consumption of a large amount of concentrated sulfuric acid and expensive silver sulfate in the analysis proce...

Claims

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Application Information

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IPC IPC(8): G01N27/00G01N27/30G01N27/409
Inventor 金利通李嘉庆李洛平郑蕾张文鲜跃仲吴荣坤庄荣华
Owner EAST CHINA NORMAL UNIVERSITY
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