Vacuum ultraviolet ionized aerosol mass spectrometer

A vacuum ultraviolet light and aerosol technology, applied in instruments, scientific instruments, material analysis by electromagnetic means, etc., can solve the problem that instruments cannot directly inject samples, cannot directly obtain particle size and chemical composition information of single aerosol particles, It is impossible to analyze the chemical composition of complex organic aerosol particles effectively and in real time, so as to avoid fragment ions and effectively analyze and detect.

Inactive Publication Date: 2008-03-26
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

Since both aerosol mass spectrometers cause severe dissociation and ionization (i.e., many fragment ions) of organic molecules during gasification and ionization, neither of them can effectively analyze the chemical composition of complex organic aerosol particles in real time
In addition, the instrument described in the patent No. ZL 03220876.6 applied by the Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences cannot directly inject samples, nor can it directly obtain the particle size and chemical composition information of a single aerosol particle

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  • Vacuum ultraviolet ionized aerosol mass spectrometer

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specific Embodiment approach

[0009] The main part of the vacuum ultraviolet photoionization aerosol mass spectrometer is composed of four parts: a sample injection chamber (1), a particle size measurement chamber (2), an ionization chamber (3), and a reflective mass device (4). The specific implementation method is: one, the organic aerosol is directly inhaled from the atmosphere by the sample inlet (5) of 200 microns in diameter; ), the pneumatic focusing lens group (6) is made up of 6~8 pneumatic focusing lenses, and in the pneumatic focusing lens group (6), the aerosol particles are accelerated and focused to form an aerosol particle flow with a diameter of about 1 mm; Three, the aerosol Particles enter the particle size measurement chamber (2) from the small hole between the sampling chamber (1) and the particle size measurement chamber (2), and there is a rotary disk type particle size measurer (7) in the particle size measurement chamber (2) , the particle flow is cut into particle clusters by the s...

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Abstract

The invention applies a vacuum ultraviolet ionized gasoloid mass spectrograph which can analyze and detect the organic gasoloid in atmosphere continuously. The spectrograph can sample the gasoloid in natural environment by using the microhole directly; the gasoloid particle is focused to the particle beam by the air-actuated focusing lens group; the particle size can be measured by the rotating particle size measurer in measuring room; the organic gasoloid is gasified by the temperature control gasifier; the gasifying gas is ionized by the vacuum ultraviolet light and the ion is detected by the reflected spectrograph device to get the gasoloid spectrograph. So it can get the concentration, particle distribution and chemical component information of the gasoloid.

Description

Technical field [0001] The invention relates to a vacuum ultraviolet photoionization aerosol mass spectrometer, which is an instrument that can directly continuously monitor and analyze organic aerosols in the atmosphere. Background technique [0002] Aerosols are solid or liquid particles suspended in the air, and are mainly divided into two categories: inorganic and organic aerosols. This instrument mainly involves organic aerosols. Organic particulate matter (aerosol) accounts for 20-50% of the total amount of fine aerosol particles (PM2.5) in the atmosphere, and is one of the main urban particulate pollutants. They include primary organic particulate matter directly emitted from nature and human activities and produced by Secondary organic particles produced by the reaction of volatile organic compounds in the atmosphere. The chemical composition of organic aerosol particles is complex, and the main components found are: alkanes, phytanes and steranes, aliphatic and ar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N27/62
Inventor 束继年解淑霞李曜高绍凯
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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