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Automatic On-Line Monitor for Measuring Chemical Oxygen Demand of Water Body

A chemical oxygen demand and monitoring instrument technology, applied in measuring devices, scientific instruments, instruments, etc., can solve the problems of narrow water body range, difficult quantitative description of nonlinear relationship, low accuracy of COD value, etc. small effect

Active Publication Date: 2018-07-27
江苏国技聚能环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex and diverse components in the actual water body, the linear range between spectral data and COD is very narrow, and the nonlinear relationship is difficult to describe quantitatively
In addition, limited by the Lambert-Beer's law of solutions, only dilute solutions can be detected, and the detection is affected by multiple factors, such as pH value, colloid, emulsion, and suspension.
Therefore, the accuracy of the COD value measured by UV-visible spectrophotometry is not high, and the range of detectable water bodies is narrow

Method used

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  • Automatic On-Line Monitor for Measuring Chemical Oxygen Demand of Water Body
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  • Automatic On-Line Monitor for Measuring Chemical Oxygen Demand of Water Body

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] refer to Figure 1a , Figure 1bAs shown, an automatic on-line monitor for measuring the chemical oxygen demand of water body includes an electrolytic cell 1 transparent to ultraviolet light, in which a reference electrode 101, a counter electrode 102 and a TiO2 working electrode 103 made of nanometer material are arranged in the electrolytic cell 1, The reference electrode 101 and the counter electrode 102 are arranged on the same side of the working electrode 103 in parallel, the reference electrode 101, the counter electrode 102 and the working electrode 103 are connected to the potentiostat 2, and the electrolytic cell 1 is positioned at the working electrode 103 side A liquid inlet 104 is arranged at the upper end, and a high-power LED ultraviolet lamp 3 is arranged outside. The LED ultraviolet lamp 3 is connected to a ra...

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Abstract

The invention discloses an automatic on-line monitor for measuring the water body COD. The monitor comprises an ultraviolet transparent electrolytic cell, wherein a reference electrode, a counter electrode and a working electrode made from a TiO2 nanometer material are arranged in the electrolytic cell, the reference electrode and the counter electrode are arranged on the same side of the working electrode in parallel, the reference electrode, the counter electrode and the working electrode are connected to a constant potential rectifier, a liquid inlet is formed in the upper end, located on one side of the working electrode, of the electrolytic cell, a high-power LED ultraviolet lamp is arranged on the outside of the electrolytic cell, and a liquid outlet is formed in the lower end, located on the other side of the working electrode, of the electrolytic cell. According to the automatic on-line monitor for measuring the water body COD, a high-power ultraviolet LED light source and an efficient heat dissipation structure, the nanometer TiO2 working electrode, a peristaltic pump and a miniature electromagnetic valve are adopted, so that light, rapid and automatic on-line monitoring is realized, the volume of test solution required for analysis each time is small, secondary pollution is not caused, and the monitor is suitable for site and on-line monitoring and can be used for laboratory analysis.

Description

technical field [0001] The invention belongs to the field of on-line monitoring of environmental water bodies, in particular to an automatic on-line monitor using a high-power ultraviolet LED lamp as a light source. Background technique [0002] Chemical Oxygen Demand (COD) is the amount of oxidant consumed when a certain oxidant is used to treat water samples under certain conditions, which is converted into the concentration of oxygen required by the water body (mg / L). It is an indicator of the degree of water pollution by reducing substances. It is a must-test indicator for water body monitoring in countries all over the world. [0003] At present, the detection of COD in water bodies at home and abroad is mainly chromium method (GB11914-1989), manganese method (GB11892-1989) and ultraviolet-visible spectrophotometry (HJ / T399 2007). The chromium method is mainly used in the detection of highly polluted water and industrial wastewater, and the manganese method and ultrav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
CPCG01N27/416
Inventor 赵真真范开喜石威
Owner 江苏国技聚能环境科技有限公司
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