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Detection method suitable for sewage with high chlorine and high COD (chemical oxygen demand)

A detection method and technology for sewage, which can be used in testing water, measuring devices, material inspection products, etc., can solve problems such as inaccurate COD detection results, and achieve the effect of wide application, reduced error and small error.

Active Publication Date: 2018-12-11
CHONGQING TECH & BUSINESS UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a detection method suitable for sewage with high chlorine and high COD, so as to solve the problem that the COD detection result in sewage is inaccurate when the content of chloride ions in sewage is high

Method used

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  • Detection method suitable for sewage with high chlorine and high COD (chemical oxygen demand)
  • Detection method suitable for sewage with high chlorine and high COD (chemical oxygen demand)
  • Detection method suitable for sewage with high chlorine and high COD (chemical oxygen demand)

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Embodiment 1

[0026] A kind of detection method applicable to the sewage of high chlorine and high COD, comprises the following steps:

[0027] (1) The detection needs to determine the mass concentration of chloride ions in the COD solution;

[0028] (2) prepare the mercuric sulfate solution of multiple mass concentration, make the mass concentration of mercuric sulfate solution and the mass concentration of chloride ion become gradient ratio, the scope of mass ratio is: greater than or equal to 25:1;

[0029] (3) 5-10ml of the solution in step (1) is taken, and the amount taken in this embodiment is preferably 10ml;

[0030] (4) in the solution of step (2), add the mercuric sulfate solution in step (3) and carry out complexation to chloride ion;

[0031] (5) Detect the COD of the solution in step (4), and calculate the relative error.

[0032] Use pot belly pipette and quantitative pipetting device when getting solution in step (3), as figure 1 As shown, the quantitative liquid pipettin...

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Abstract

The invention belongs to the technical field of sewage detection, and particularly discloses a detection method suitable for sewage with high chlorine and high COD (chemical oxygen demand). The methodcomprises the following steps: (1) detecting a chloride ion mass concentration in a COD solution which needs measuring; (2) preparing a mercury sulfate solution with multiple kinds of mass concentrations so as to enable the mass concentration of the mercury sulfate solution and the mass concentration of chloride ions to be in a gradient ratio, wherein the range of a mass ratio is (25 to 30) to 1;(3) taking 5-10ml of the solution in the step (1); (4) adding the mercury sulfate solution in the step (3) into the solution in the step (2) and carrying out complexing on chloride ions; and (5) detecting the COD in the solution in the step (4), and calculating a relative error. The detection method is mainly used for measuring the COD in high-chlorine sewage, and the problem that the detection result of the COD in the sewage is not accurate when the content of the chloride ions in the sewage is high is solved.

Description

technical field [0001] The invention belongs to the technical field of sewage detection, and specifically discloses a detection method suitable for high chlorine and high COD sewage. Background technique [0002] With the continuous improvement of the industrial level and the continuous increase of the urban population, while achieving rapid economic development, it also has a certain impact on the quality of urban life. At present, my country's urban sewage has caused certain disturbances to the living environment and quality of life. The reason has a lot to do with the construction of urban sewage treatment pipe network and the weak awareness of environmental protection. Because sewage contains a large amount of harmful substances such as ammonia and chlorine, living in this environment for a long time will bury hidden dangers to people's health. Most of these toxic substances have an unpleasant smell. It has an impact on the quality of life, and it is imperative to impr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18G01N21/82
CPCG01N21/82G01N33/1806G01N33/182G01N2021/825
Inventor 申渝杨虹燕高旭王建辉齐高相尹文洁
Owner CHONGQING TECH & BUSINESS UNIV
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