Method for detecting content of nitrogen dioxide in air

Abstract

The invention relates to the technical field of nitrogen dioxide detection, and discloses a method for detecting the content of nitrogen dioxide in the air. The method comprises the following steps: S1, sampling: taking three identical test tubes, collecting the same volume of air in the air, sealing the tubes and putting the test tubes which complete the collection in a cool and dry place for detection. According to the method for detecting the content of nitrogen dioxide in the air, nitrogen oxide in the air is introduced into water and heated; when the temperature is higher than 150 DEG C,decomposition is started, and when the temperature reaches 650 DEG C, the nitrogen dioxide is completely decomposed into nitric oxide and oxygen; the nitrogen oxide reacts with the water to generate nitric acid and nitric oxide, thereby realizing detection and reaction collection of the nitrogen oxide in the air; the decomposed nitric oxide and oxygen facilitate concentration detection of the nitrogen oxide more conveniently; and reaction decomposition treatment of the nitrogen oxide is achieved while the nitrogen oxide in the air is detected, thereby realizing integration of treatment and detection.

Description

technical field [0001] The invention relates to the technical field of nitrogen dioxide, in particular to a method for detecting nitrogen dioxide content in air. Background technique [0002] Nitrogen dioxide refers to brown-red toxic gas at high temperature. At room temperature (0~21.5°C), nitrogen dioxide and dinitrogen tetroxide coexist. Toxic and irritating. Dissolved in concentrated nitric acid to produce fuming nitric acid. It can be folded into dinitrogen tetroxide. React with water to form nitric acid and nitric oxide. It reacts with alkali to generate nitrate. It can react violently with many organic compounds, and nitrogen dioxide plays an important role in the formation of ozone. Man-made nitrogen dioxide mainly comes from the release of high-temperature combustion processes, such as vehicle exhaust and boiler exhaust emissions. Nitrogen dioxide is also a cause of acid rain, which has a variety of environmental effects, including: effects on competition and...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for detecting the content of nitrogen dioxide in the air, which has the advantages of being convenient for detecting the content of nitrogen dioxide in the air, and solves the problem that the content of nitrogen dioxide in the air cannot be effectively detected