Nitrogen dioxide and ozone combined online detection device and method

Abstract

The invention discloses a nitrogen dioxide and ozone combined online detection device and method. The device comprises a detection system, a liquid path system, a gas path system and a main control system. The method utilizes the device to realize nitrogen dioxide and ozone combined online detection. The method utilizes a high detection sensitivity gas-liquid phase chemiluminescence principle, realizes combined online detection of conventional pollutant gas such as nitrogen dioxide and ozone in air, eliminates mutual interference between two types of gas, improves the detection result accuracy, reduces the detection cost, has a simple structure, a small size and light weight, is easy to carry and can be easily used in field of field emergency detection.

Description

technical field [0001] The invention relates to the technical field of gas detection, and more specifically relates to a combined online detection device and method for nitrogen dioxide and ozone. Background technique [0002] Ozone is a kind of photochemical pollution gas, which has strong oxidizing properties, and high concentration of ozone has great harm to human body and plants. Nitrogen dioxide is also an important air pollutant and the only chemical source of ozone in the tropospheric atmosphere. At present, countries all over the world use nitrogen dioxide and ozone as the main detection indicators for environmental monitoring. [0003] At present, in the field of fixed-point monitoring, the gas phase chemiluminescence method is generally used for the detection of nitrogen dioxide, and the ultraviolet absorption photometry is generally used for the detection of ozone. Therefore, for the detection of the two gases, the detection methods and detection equipment are c...

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Problems solved by technology

This results in higher equipment costs, higher testing and maintenance costs

At the same time, the gas-phase chemiluminescence method itself converts nitrogen dioxide into nitric oxide for detection, and the interference of other nitrogen-containing gases will be introduced during the reduction conversion process; while the sensitivity of the ultraviolet absorption photometry i

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