A fast detection method and device based on electrochemiluminescence COD
An electrochemical and rapid technology, applied in the field of COD detection, can solve the problems of difficult to achieve direct detection of suspended solids, single-use cross-interference, reagent consumption to reduce detection costs, miniaturization and portability, and instability of hydroxyl radicals. Achieve no secondary pollution, reduce reagent consumption, and reduce reagent consumption
Inactive Publication Date: 2016-05-04
CHANGSHU INSTITUTE OF TECHNOLOGY
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Problems solved by technology
These methods are all affected by the instability of hydroxyl radicals generated by the electrochemical electrodes, which lead to the problem of unstable detection.
Moreover, the size and cost of the electrochemical electrode itself, as well as the limitations of the basic structure of the liquid storage pool, cannot fundamentally solve the problems of significantly reducing reagent consumption, reducing detection costs, miniaturization and portability, and it is even more difficult to achieve samples containing suspended solids and particulate matter. direct detection and single-use to reduce cross-talk
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[0014] The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.
[0015] See figure 1 and figure 2 , a device based on electrochemiluminescence COD rapid detection, composed of a first flat electrode 1, a first porous film 2, an anion permeable membrane 3, a second porous film 4 and a second flat electrode 5 stacked in sequence from bottom to top On the conductive surface of the first flat electrode 1, use a ceramic blade to etch two etching lines 8 penetrating the conductive surface. The first flat electrode 1 is divided into three mutually insulated regions by the etching lines 8, and the middle region is used as the working electrode Equally on the second plate electrode 5 conducting surfaces, etch two through the etching lines 7 of the conducting surfaces with a ceramic blade, the second plate electrodes 5 are divided into three mutually insulated regions by the etching lines 8, and the midd...
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The invention provides a method and a device for rapidly detecting the COD (chemical oxygen demand) on the basis of electrochemical luminescence, and belongs to a novel method and device for analysis and detection. The device comprises two plate electrodes, two layers of film materials and one layer of an anion permeable membrane. Voltage is applied to a working electrode, potassium ferrocyanide is generated at the side where the voltage is applied, hydrogen peroxide and a Luminol system at the electrode side are enabled to illuminate, a sample is added to change the illumination intensity, and the change of the illumination intensity is related to the COD of the sample. According to the method and the device, the detection speed is high, the reagent consumption is small, and secondary pollution cannot be caused; and the cost of the detection device is low, the device is disposable, and cross interference of detected samples is reduced. The method and the device have a great application prospect in the aspects such as COD on-site rapid detection, on-line detection and the like.
Description
technical field [0001] The invention relates to a method and a device for detecting COD, in particular to a method and a device for rapidly detecting COD based on electrochemiluminescence. Background technique [0002] COD (Chemical Oxygen Demand) is a frequently measured item in water quality monitoring, and it is a very important indicator for evaluating the pollution degree of water bodies by reducing substances or organic substances. When the concentration of organic matter in the water body reaches the limit of the water body, a large amount of dissolved oxygen will be consumed under the action of microorganisms, which will seriously damage the stability of the ecosystem, and a large number of aquatic animals will die as a result. Therefore, timely, rapid and accurate determination of COD value is of great significance to social production and environmental safety. [0003] The traditional dichromate method for detecting COD has problems such as long time-consuming, la...
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IPC IPC(8): G01N21/76G01N27/26G01N27/333
Inventor 翟春王坤汪学英张根华权英李佳
Owner CHANGSHU INSTITUTE OF TECHNOLOGY