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Poison-free quick COD (chemical oxygen demand) detection method

A detection method and rapid technology, applied in the field of detection, can solve the problems of increasing detection cost, endangering health, long detection time, etc., and achieve the effects of high accuracy, high degree of automation, and fast measurement speed.

Inactive Publication Date: 2017-05-10
厦门海旭东方智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used COD analysis method is the potassium dichromate method. This detection method takes a long time and requires the use of toxic reagents. The toxic reagents need to be specially collected and processed, otherwise it will endanger human health. Reagents need to be replaced frequently and detection instruments need to be calibrated, which greatly increases the cost of detection, which brings inconvenience to users

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A non-toxic and rapid COD detection method, the specific steps are as follows:

[0015] Step 1: Prepare the regeneration solution, standard solution and electrolyte, the main computer controls the action of the pump, and sends the sample, regeneration solution, standard solution and electrolyte to the measurement chamber through the pump. The electrolyte uses sodium sulfate solution, and the standard solution uses glucose solution;

[0016] Step 2: Under the overvoltage in the measurement chamber, the working electrode generates hydroxyl radicals, which oxidize organic matter and cause the electrode potential to drop. The more oxidation, the lower the electrode potential;

[0017] Step 3: In order to maintain the potential stability in the measurement chamber, a measurement current will be generated. The intensity of the measurement current is proportional to the COD value, and the COD value can be calculated by measuring the current.

Embodiment 2

[0019] A non-toxic and rapid COD detection method, the specific steps are as follows:

[0020] Step 1: prepare regeneration solution, standard solution and electrolyte, the main computer controls the action of the pump, and sends the sample, regeneration solution, standard solution and electrolyte to the measurement chamber through the pump, and the regeneration solution uses sodium sulfate solution;

[0021] Step 2: Under the overvoltage in the measurement chamber, the working electrode generates hydroxyl radicals, which oxidize organic matter and cause the electrode potential to drop. The more oxidation, the lower the electrode potential;

[0022] Step 3: In order to maintain the potential stability in the measurement chamber, a measurement current will be generated. The intensity of the measurement current is proportional to the COD value, and the COD value can be calculated by measuring the current.

Embodiment 3

[0024] A non-toxic and rapid COD detection method, the specific steps are as follows:

[0025] Step 1: Prepare the regeneration solution, standard solution and electrolyte, the main computer controls the action of the pump, and sends the sample, regeneration solution, standard solution and electrolyte to the measurement chamber through the pump. The electrolyte uses sodium sulfate solution, and the standard solution uses Glucose solution, sodium sulfate solution is used as regeneration solution;

[0026] Step 2: Under the overvoltage in the measurement chamber, the working electrode generates hydroxyl radicals, which oxidize organic matter and cause the electrode potential to drop. The more oxidation, the lower the electrode potential;

[0027] Step 3: In order to maintain the potential stability in the measurement chamber, a measurement current will be generated. The intensity of the measurement current is proportional to the COD value, and the COD value can be calculated by ...

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Abstract

The invention discloses a poison-free quick COD (chemical oxygen demand) detection method. The poison-free quick COD detection method specifically comprises the following steps of 1, preparing regeneration liquid, standard liquid and electrolyte, enabling a main computer to control the action of a pump, and sending a sample, the regeneration liquid, the standard liquid and the electrolyte into a measuring bin by the pump; 2, enabling a working electrode to generate hydroxyl radical in the measuring bin at overvoltage, and enabling the hydroxyl radical to oxidize an organic matter to degrade the electrode potential; 3, producing measuring current in the measuring bin, so as to calculate the COD value through the measuring current. The poison-free quick COD detection method has the advantages that by adopting a poison-free and pollution-free reagent, the secondary pollution is avoided, and the hazard to human body health is avoided; the measuring speed is high, a result can be measured within 3min, the main computer is used for controlling, the automation degree is high, the frequent replacing of reagent is not needed, a detection instrument does not need to be calibrated, and the use cost is reduced; the accuracy of the measuring result obtained by the method is high, the method is suitable for complicated and variable water samples, and the use effect is good.

Description

technical field [0001] The invention relates to a detection method, in particular to a nontoxic and fast COD detection method. Background technique [0002] COD is chemical oxygen demand, which is a chemical method to measure the amount of reducing substances that need to be oxidized in a water sample. COD is the oxygen equivalent of substances (generally organic matter) that can be oxidized by strong oxidants in wastewater, wastewater treatment plant effluent and polluted water. In the research of river pollution and industrial wastewater properties and the operation and management of wastewater treatment plants, COD is An important parameter of organic pollution that can be determined relatively quickly. At present, the commonly used COD analysis method is the potassium dichromate method. This detection method takes a long time and requires the use of toxic reagents. The toxic reagents need to be specially collected and processed, otherwise it will endanger human health. ...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 熊焕祈李坤曾达义熊文斌黄道星
Owner 厦门海旭东方智能科技有限公司
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