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Method and apparatus for determining water content and moisture absorption mass increase rate of atmospheric particles

A technology for atmospheric particulate matter and moisture content, which is applied in sampling devices, material absorption and weighing, etc., can solve the problems of hygroscopic growth that has not yet been involved, and that the moisture content and mass hygroscopic growth rate of particulate matter cannot be systematically measured and insufficient.

Inactive Publication Date: 2012-10-24
INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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Problems solved by technology

At present, due to the lack of effective technical means, the research on the mass hygroscopicity of particulate matter is not sufficient, the moisture content and mass hygroscopic growth rate of particulate matter cannot be systematically measured, and the mass hygroscopic growth rate of particulate matter in urban haze days has not been involved

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  • Method and apparatus for determining water content and moisture absorption mass increase rate of atmospheric particles
  • Method and apparatus for determining water content and moisture absorption mass increase rate of atmospheric particles
  • Method and apparatus for determining water content and moisture absorption mass increase rate of atmospheric particles

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Embodiment Construction

[0024] see figure 1 and figure 2 As shown, the present invention discloses a controllable humidity filter membrane system combined with balance weighing and thermal conductivity detector\gas chromatography (GC-TCD) method and device, after water removal and purging, controlled humidification, micro balance weighing, etc. A series of steps to measure the moisture content of the collected atmospheric particulate matter itself and the moisture absorption growth rate of the mass concentration under different relative humidity.

[0025] The specific technical scheme and operation are as follows:

[0026] In the case of controlling the temperature and relative humidity, the filter membrane is weighed before and after sampling, and the increase in the mass of the filter membrane is divided by the sampled gas volume at the corresponding time to obtain the average particle mass concentration during the sampling period. The advantage of this method is that a sample can be weighed at ...

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Abstract

The invention relates to a method for determining water content and moisture absorption mass increase rate of atmospheric particles. The process comprises that: 1) an atmospheric sample passes through a filtration membrane, particles in the atmosphere are collected on the filtration membrane, and sampling is stopped after a predetermined time to obtain a sample membrane adsorbed with the atmospheric particles in a sampling time; 2) the sample membrane is subjected to dry gas purging, water content of the purged moisture is quantitatively determined; and 3) gases with different humidity are repeatedly introduced to the sample membrane to carry out moisture absorption culture, weights of the filtration membrane before and after moisture absorption are weighed, and mass increase rate of the atmospheric sample under different humidity conditions is calculated. The present invention further discloses an apparatus for performing the method. With the present invention, base data is provided for dust-haze formation mechanism, air quality, atmospheric chemistry model development research and the like, and important effects are provided for researches of cloud water chemistry and physics, artificial influence on weather, atmospheric radiation and climate, and the like.

Description

technical field [0001] The invention belongs to the field of air quality research and atmospheric particulate matter monitoring, in particular to a system for measuring the water content and moisture absorption growth rate of atmospheric particulate matter. [0002] The invention also relates to a method for measuring the water content and the moisture absorption growth rate of the atmospheric particles. Background technique [0003] Atmospheric particulate matter pollution and regional haze pollution are global climate and environmental problems. The mass concentration of particulate matter soars on hazy days, and mass concentration is one of the most important indicators for current air quality standards and particulate matter research. The mass of particulate matter can increase several times due to moisture absorption under a certain atmospheric humidity. Therefore, parameters such as hygroscopic characteristics and water content of particulate matter are important facto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N1/22
Inventor 孙扬刘全王跃思修天阳
Owner INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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