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Nanometer aerosol hygroscopicity measurement system and method

A measurement system and aerosol technology, applied in the direction of measurement devices, particle and sedimentation analysis, particle size analysis, etc., can solve the problem of low measurement accuracy, achieve the effect of facilitating experiments and improving accuracy

Inactive Publication Date: 2019-08-16
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Therefore, an embodiment of the present invention provides a nano-aerosol hygroscopicity measurement system and method to solve the problem of low measurement accuracy in the prior art

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  • Nanometer aerosol hygroscopicity measurement system and method

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[0048] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] This application proposes a nano-aerosol hygroscopicity measurement system, see attached figure 1 The schematic diagram of the nano-aerosol hygroscopicity measurement system shown, the system includes: an aerosol selection unit 101, an aerosol humidification unit 102, a cache unit 103, a particle size distribution measurement unit 104 and a calculation unit 105 connected in sequence;

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Abstract

The embodiment of the invention relates to the technical field of the atmospheric measurement, and specifically relates to a nanometer aerosol hygroscopicity measurement system and method. The nanometer aerosol hygroscopicity measurement system comprises an aerosol selection unit, an aerosol humidification unit, a particle size distribution measurement unit and a computation unit which are connected in order; the aerosol selection unit is used for selecting to-be-measured aerosol particle with predetermined diameter; the aerosol humidification unit is used for humidifying the selected to-be-measured aerosol particle with predetermined diameter so as to reach the predetermined humidity; a buffering unit is used for temporarily storing the humidified to-be-measured aerosol particle; the particle size distribution measurement unit is used for measuring the to-be-measured aerosol particle passing through the buffering unit; and the computation unit is used for computing a moisture absorption growth factor corresponding to the humidity for any humidity. The buffering unit buffers the to-be-measured aerosol particle so as to better reach water vapor equilibrium, especially for the aerosol particle with small particle size, the subsequent measurement precision can be improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of atmospheric measurement, and in particular to a nano-aerosol hygroscopicity measurement system and method. Background technique [0002] Atmospheric aerosols refer to liquid and solid particle systems suspended in the atmosphere with an aerodynamic diameter of 0.001-100 μm. Hygroscopicity is one of the main properties of aerosols, which refers to the water absorption capacity of aerosols when the relative humidity (RH) of the surrounding environment increases, and is related to particle size and chemical composition. So far, although the hygroscopicity of pure inorganic salts or salt mixtures with a particle size greater than 100nm has been extensively studied, the measurement accuracy is low. Recent studies have shown that these nuclear-mode fine particles are widely observed, whether in continental boundary layers, polluted urban areas, industrial plumes, or in convective clou...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/02
Inventor 胡长进李彪周家成
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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