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Method for measuring chemical oxygen demand and total organic carbon by mode of oxidizing floating injected ozone

A chemical oxygen demand and ozone oxidation technology, applied in the field of environmental chemical monitoring, can solve problems such as long analysis duration, complicated analysis process, and harsh conditions, and achieve the effects of long service life, strong environmental adaptability, and high ozone concentration

Inactive Publication Date: 2007-07-25
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0010] In order to solve the deficiencies of the prior art, the present invention provides a method for measuring chemical oxygen demand and total organic carbon by means of flow injection ozone oxidation, which can solve the problems of the prior art, such as long analysis duration, complicated analysis process and harsh conditions , high energy consumption, especially secondary pollution and other issues

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  • Method for measuring chemical oxygen demand and total organic carbon by mode of oxidizing floating injected ozone

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Embodiment Construction

[0044] The inventive method comprises the following steps:

[0045] (1). Utilize electrolytic type ozone generator 2 to produce the ozone solution of stable concentration, the concentration of ozone is 10mg / l, circulates ozone solution balance chamber 21 under 0.05ml / min flow rate by peristaltic pump 7.

[0046] (2). After the ozone solution flows through the dynamic balance pipe 6 of the ozone solution, it is first mixed with the water sample delivered by the peristaltic pump 8, and an oxidation reaction occurs during the mixing flow, and the flow rate of the water sample is 0.5ml / min.

[0047] (3). The mixed reaction solution is mixed with the sodium bicarbonate solution delivered by the peristaltic pump 10 after flowing a section of the pipeline. Sodium bicarbonate rapidly consumes the remaining hydroxyl radicals in the solution as a capture agent for hydroxyl radicals, because the hydroxyl radicals are free The base energy oxidizes luminol to produce chemiluminescence, whi...

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Abstract

A method for measuring COD and total organic carbon by utilizing flow injection mode includes obtaining ozone with known concentration, carrying out oxidation reaction by mixing ozone solution with water sample then mixing obtained mixture with sodium acid carbonate solution and luminal solution as well as cobalt ion solution, using photoelectric multiplier tube to detect generated chemical luminous signal and calculating out COD and total organic carbon of water sample.

Description

technical field [0001] The invention relates to the technical field of environmental chemical monitoring, specifically based on the phenomenon that luminol can be oxidized by ozone and hydroxyl radicals produced by ozone decomposition to produce chemiluminescence, and utilize flow injection technology to pass blank solution (double distilled water) The method of measuring the chemical oxygen demand (COD) and total organic carbon (TOC) of the water body by the difference of the chemiluminescent intensity produced by the tested water sample. Background technique [0002] At present, the domestic method of measuring the chemical oxygen demand (COD) of water is basically the analysis method of potassium dichromate or permanganate oxidation titration. The method lasts for a long time, the analysis process is complicated, the conditions are harsh, the reagent consumption is large, and the secondary Secondary pollution, etc. For complex and changeable environments, for example: the...

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Application Information

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IPC IPC(8): G01N21/76G01N1/44G01N31/00
Inventor 王军成刘岩孙继昌侯广利杜立彬尤小华白强
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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