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1-3nm monodisperse aerosol generating system

An aerosol generation and monodisperse technology, applied in material separation, material analysis, colloid chemistry, etc., can solve the problems of inability to obtain strictly monodisperse aerosol, inability to obtain aerosol with uniform diameter, inability to generate aerosol, etc.

Active Publication Date: 2014-07-23
TSINGHUA UNIV
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Problems solved by technology

[0002] Existing aerosol generation systems cannot produce strictly monodisperse aerosols, which is inconvenient for research on aerosol chemical and physical properties and aerosol instrument calibration
For example, the Chinese invention patent aerosol generator (publication number CN101352661A) utilizes the principle of cloud condensation to generate submicron aerosols, but this method cannot obtain strictly monodisperse aerosols with uniform diameters; Method quasi-monodisperse submicron aerosol generator (publication number CN101284220A) and a submicron solid sodium chloride aerosol generation method and its device (publication number CN1974387A) generate aerosol particle size distribution obeying logarithmic normal distribution, The geometric standard deviations are 1.3 and 1.85 respectively, that is, a strictly monodisperse standard aerosol cannot be obtained
[0003] In addition, existing aerosol generating devices and systems cannot generate aerosols with a particle size range of 1-3nm

Method used

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Embodiment Construction

[0021] The present invention provides a 1-3nm monodisperse aerosol generating system. The principle, working process and specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0022] figure 1 It is a schematic diagram of a 1-3nm monodisperse aerosol generating system, which is mainly composed of an electrospray generator, a high-resolution differential mobility analyzer (HRDMA) 8 and an aerosol electrometer 12 . Among them, the structure of the electrospray generator is as follows figure 2 shown.

[0023] The 50mL syringe 1 and its syringe valve 2 are connected through a hose, the syringe valve 2 and the electrospray generator are connected to the electrospray connection chamber 3 through the syringe connection port 22, and the electrospray needle 19 can be adjusted by using the syringe 1 and the syringe valve 2. solution flow rate. The electrospray connection chamber 3 (18mm×25mm×20mm) is made of p...

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Abstract

The invention belongs to the technical field of environment aerosol, and particularly relates to a 1-3nm monodisperse aerosol generating system. The 1-3nm monodisperse aerosol generating system mainly comprises an electrospray generator, a high-resolution difference electromobility analyzer and an aerosol electrometer. A series of standard ions are screened by the high-resolution difference electromobility analyzer so as to obtain the required monodisperse aerosol; the aerosol is measured by the aerosol electrometer with the efficiency no less than 99%, and the measurement accuracy is ensured; the monodisperse nano aerosol is obtained by the system; aerosol with severe monodispersity at the geometric particle size range of 0.7-3nm can be obtained by utilizing an organic solution of tera alkyl ammonium halide and a water solution of ammonium acetate, and the obtained standard positive and negative ion aerosol concentrations are respectively within the concentration ranges of 10<6>-10<7> piece / cm<3> and 10<5>-10<6> piece / cm<3>.

Description

technical field [0001] The invention belongs to the technical field of environmental aerosols, in particular to a 1-3nm monodisperse aerosol generating system. Background technique [0002] Existing aerosol generation systems cannot produce strictly monodisperse aerosols, which is inconvenient for research on aerosol chemical and physical properties and aerosol instrument calibration. For example, the Chinese invention patent aerosol generator (publication number CN101352661A) utilizes the principle of cloud condensation to generate submicron aerosols, but this method cannot obtain strictly monodisperse aerosols with uniform diameters; Method quasi-monodisperse submicron aerosol generating device (publication number CN101284220A) and a submicron-level solid sodium chloride aerosol generating method and device (publication number CN1974387A) generate aerosol particle size distribution obeying logarithmic normal distribution, The geometric standard deviations are 1.3 and 1.85...

Claims

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Application Information

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IPC IPC(8): B01J13/00G01N30/06B05B5/00
Inventor 蒋靖坤麦华俊张强郝吉明
Owner TSINGHUA UNIV
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