Atmospheric aerosol collection and ion detection device and method

Abstract

The invention discloses an atmospheric aerosol collection and ion detection device and method. The device comprises a PM2.5 cutting head, a corrosion device, an absorption liquid bottle, a first ion chromatography, a second ion chromatography, an aerosol inlet, an aerosol diluting and growing cavity and an aerosol collision collector, an air inlet connected with the PM2.5 cutting head and an air outlet connected with the aerosol inlet are formed in the front end and the rear end of the corrosion device respectively, and an absorption liquid inlet connected with the absorption liquid bottle and an absorption liquid outlet connected with the first ion chromatography are formed in the two sides of the lower end of the corrosion device respectively; the aerosol inlet is simultaneously connected with the steam nozzle, the aerosol inlet, the aerosol diluting and growing cavity, the aerosol collision collector and the second ion chromatography are sequentially connected, the aerosol diluting and growing cavity is of a two-section type, and condensation pipes are wound on the outer walls of the two ends of the aerosol diluting and growing cavity respectively. The device is simple in structure and easy and convenient to operate, and can rapidly and accurately analyze the concentration of ion components in atmospheric gaseous and particulate pollutants at the same time.

Description

technical field [0001] The invention relates to the technical field of air pollutant detection devices, in particular to an atmospheric aerosol collection and ion detection device and method. Background technique [0002] Atmospheric aerosol refers to a stable mixed system composed of solid particles and liquid particles uniformly dispersed in the atmosphere. They can serve as condensation nuclei for water droplets and ice crystals, absorbers and scatterers of solar radiation, and play an important role in balancing marine and terrestrial ecosystems, regulating environmental factors, and promoting nutrient cycling. It provides an important reaction medium for atmospheric heterogeneous reactions and is an important part of the atmosphere. Atmospheric aerosols are small in particle size, rich in a large amount of toxic and harmful substances, stay in the atmosphere for a long time, and have long transmission distances. Therefore, the impact on human health and the quality of ...

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Problems solved by technology

This sampling-analysis method has many significant disadvantages: (1) The pretreatment and sampling process of membrane sampling will consume a lot of labor costs, and the experimenter will lose the sampling membrane due to various irresistible factors during the experiment; (2) During the frozen storage process of the sampling film, the total mass of the atmospheric aerosol on the surface of the film will be more or less lost as the external environmental conditions change, and its physical and chemical components will also change; (3) Off-line analysis During the process, due to factors such as personnel operation and system error, there is a certain error between the measurement result and the actual result.

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