Method and apparatus for determining active nitrogen oxide component in particle state in atmosphere particle

Abstract

A method and an apparatus for determining active nitrogen oxide components in particle state in atmosphere particles. The method mainly comprises steps: 1) an air sample treated with aerodynamic equivalent particle size cutting passes through a molybdenum converter and enters to a nitric oxide detector, so as to detect a concentration of all active nitrogen oxides both in gaseous state and particle state; 2) the air sample treated with aerodynamic equivalent particle size cutting passes through a particle filter to filter out all particles in the air sample; and then the sample passes through the molybdenum converter and enters into the nitric oxide detector, so as to obtain the concentration of active nitrogen oxides in gaseous state; and 3) the concentration of all active nitrogen oxides both in gaseous state and particle state obtained in the step 1) minus the concentration of active nitrogen oxides in gaseous state in the step 2) is a concentration of active nitrogen oxides in equivalent particle size of aerodynamics. The invention also discloses an apparatus for realizing the above method. The invention can effectively satisfy demands of on-line detection method and equipment for NOy of various particle sizes in particle state.

Description

technical field [0001] The invention relates to a method for measuring active nitrogen oxide components in the atmosphere, more particularly to a method for measuring active nitrogen oxide components in atmospheric particulate matter. [0002] The invention also relates to a device for implementing the above method. Background technique [0003] Urban air quality is an important factor that affects the health of residents and maintains the benign and sustainable development of society. Especially for major cities in China with rapid economic development, atmospheric environmental issues have attracted great attention from all over the world and people from all walks of life in the country. At present, the current situation of air quality in major cities across the country is worrying, among which the pollution of haze days has the greatest impact and is the most harmful. The main pollutants in haze days: particulate matter (PM) with an aerodynamic equivalent particle size b...

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Problems solved by technology

Foreign countries have relevant technical capabilities, but because developed countries do not have the combined atmospheric pollution and severe haze pollution that my country currently has, there is no relevant research and development demand

However, there is still a considerable gap in the research of atmospheric chemical observation methods in our country. At present, we are still in the stage of relying on imports or imitation. In many fields, the methods and equipment that meet the current situation in our country are still blank.

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