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
CN102798629BInactive Publication Date: 2014-07-02OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
Publication Date
2014-07-02
Estimated Expiration
Not applicable · inactive patent

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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.
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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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