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Method for measuring water sulfide concentration through flow injection chemiluminescence

A chemiluminescence and sulfide technology, which is applied in the direction of chemiluminescence/bioluminescence, and analysis through chemical reactions of materials, can solve the problems of inability to detect in real time on site, long analysis duration, complicated analysis process, etc., and achieve the degree of automation High, reproducible, and obvious advantages

Inactive Publication Date: 2014-07-02
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the deficiencies of the prior art, the present invention proposes a method for measuring the concentration of sulfide in water by flow injection chemiluminescence. Harsh, high energy consumption, especially secondary pollution and other issues

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  • Method for measuring water sulfide concentration through flow injection chemiluminescence

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Embodiment Construction

[0030] Method of the present invention comprises the following steps:

[0031] (1) The water sample to be tested is input into the water sample reaction chamber of the reaction chamber by the water sample peristaltic pump A. After the water sample reaction chamber of the reaction chamber is filled with water samples, the sample injection is stopped. The flow rate of the water sample peristaltic pump A is 1.0ml / min ;

[0032] (2) Use the ozone generator to generate ozone, the concentration range of ozone is 1.0-3.0mg / l, and send it into the ozone chamber of the reaction chamber by the ozone pump at a flow rate of 100-200ml / min, and the ozone passes through the gas disperser Enter the reaction chamber, react in the gas-liquid phase for 30-50s in the reaction chamber, and oxidize the sulfide in the water sample with ozone to generate sulfur dioxide;

[0033] (3) Deliver the fully reacted water solution to be tested through the water sample peristaltic pump B, with a flow rate of...

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Abstract

The invention provides a method for measuring a water sulfide concentration through flow injection chemiluminescence. The method is performed according to the following steps of: 1. inputting a measured water sample into a water sample reaction chamber in a reaction chamber; 2. delivering ozone into the water sample reaction chamber in the reaction chamber, performing a gas-liquid phase reaction for 30-50s, carrying out ozone oxidation to the sulfide in the water sample so as to generate sulfur dioxide; 3. transporting the completely reacted measured water sample solution, which is mixed with phosphoric acid in a phosphoric acid pipeline; 4. then mixing the mixed solution mixed with the phosphoric acid with a potassium permanganate solution, and letting a photomultiplier tube detect a chemiluminescent signal generated during oxidation of the sulfur dioxide by potassium permanganate in the solution; and 5. allowing the photomultiplier tube to collect and amplify an optical signal emitted by a solution flowing through, converting the signal into an electric signal, which is then sent into a microcomputer data processing system, then quantizing the signal, and calculating the concentration of the sulfide in the water. The invention has the advantages of high sensitivity, wide linear range, rapidity, good reproducibility, as well as high degree of automation, etc.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical monitoring, specifically, based on the phenomenon of chemiluminescence generated during the oxidation of sulfur dioxide by potassium permanganate, using flow injection technology to form sulfur dioxide by oxidizing sulfide with ozone, and using potassium permanganate to oxidize sulfur dioxide to produce A method for measuring the concentration of sulfide in water bodies by the difference in chemiluminescent intensity. Background technique [0002] Sulfide is an important indicator of water pollution. When sulfides are detected in environmental water, it indicates that the water quality has been seriously polluted. Therefore, when monitoring water bodies, the content of sulfide is an important indicator, and it is of great significance to closely monitor it. [0003] Commonly used methods for determining sulfide content in water include iodometric method, ion selective electrode me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/76
Inventor 任国兴刘岩张颖颖马然张述伟褚东志刘东彦张颖石小梅邹涛范萍萍吕靖高杨张婷曹璐王洪亮曹煊赵斌汤永佐程岩侯广利
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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