Making method of reaction film and ammonia nitrogen detection device and method based on reaction film

Abstract

The invention relates to the technical field of ammonia nitrogen detection, in particular to a making method of a reaction film and an ammonia nitrogen detection device and method based on the reaction film. The making method includes: preparing a polyvinylidene chloride-bromothymol blue solution for coating, and coating optical fiber to form the reaction film on the surface of the covering of theinclined fiber Bragg grating. The ammonia nitrogen detection device comprises a light source, signal-mode optical fiber, an inclined fiber Bragg grating, a sample pool and a spectrograph, and the reaction film is plated on a covering of the inclined fiber Bragg grating. Light is adopted as a signal carrier, so that the ammonia nitrogen detection method has the advantage of high speed. The reaction film is simple in preparation process and low in cost. The ammonia nitrogen detection device is simple in structure, needless of a complex sample pool reaction system and high in detection accuracy.

Description

technical field [0001] The invention relates to the technical field of ammonia nitrogen detection, in particular to a production method of a reaction membrane and an ammonia nitrogen detection device and method based on the reaction membrane. Background technique [0002] Sewage treatment is a difficult problem that our country is currently facing. With the increasing population, the discharge of domestic sewage and industrial development sewage has caused serious pollution to water resources. One of the common components in sewage is ammonia nitrogen. Accurate and rapid detection of ammonia nitrogen concentration in aqueous solution has become a necessary requirement for sewage treatment. [0003] Traditional measurement methods include pH sensors, ammonia nitrogen sensors and test paper detection methods. PH sensor and ammonia nitrogen sensor are commonly used measurement methods, but they are easily affected by the surrounding environment. The signal returned by the sens...

AI Technical Summary

Problems solved by technology

PH sensor and ammonia nitrogen sensor are commonly used measurement methods, but they are easily affected by the surrounding environment. The signal returned by the sensor is easily mixed with other signal interference, resulting in signal drift. The common one is temperature drift, that is, the change of uncertain signal is It is the result of the change of temperature or the change of ammonia nitrogen concentration. At the same time, the traditional method of using test paper to detect ammonia nitrogen is based on the change of test paper color and compared with the standard color chart to determine the concentration of ammonium ions. Insensitive to small changes, it is difficult to give an accurate judgment

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