Online detection system and method for soluble brown carbon of atmosphere

A detection system and soluble technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of poor time resolution, complex processing of soluble brown carbon, and only single measurement, to achieve the effect of expanding understanding

Active Publication Date: 2019-08-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

[0006] In view of the above analysis, the embodiment of the present invention aims to provide an online detection system and detection method for atmospheric soluble brown carbon, which is used to solve the problem of complex pre-processing, poor time resolution, and low accuracy of existing soluble brown carbon detection, which can only be detected separately. Measurement technical issues

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  • Online detection system and method for soluble brown carbon of atmosphere

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Embodiment 1

[0034] The invention discloses an online detection system for atmospheric soluble brown carbon, which includes a first detection subsystem, a pump group and a flow control unit; the first detection subsystem includes a first sampling unit, a first diffusion erosion unit, a second An aerosol particle collection unit, a first optical property detection unit 9 and a total organic carbon analyzer 10; the first sampling unit is used to transport air samples; the first diffusion and erosion unit is used to absorb gas molecules in the air samples; the first The optical property detection unit 9 is used to detect the optical properties of the solution in the ultraviolet-visible band; the concentration detection unit is used to detect the concentration of organic carbon; the first aerosol particle collection unit is connected to the ultrapure water inlet pipeline 13, and the first optical Both the property detection unit 9 and the total organic carbon analyzer 10 are connected with a da...

Embodiment 2

[0057] This embodiment provides an online detection method for atmospheric soluble brown carbon, using the online detection system for atmospheric soluble brown carbon provided in Example 1, wherein:

[0058] (1) When the first detection subsystem is adopted, the online detection method comprises the following steps:

[0059] Step S1. The air sample enters the first diffusion erosion unit through the first sampling unit, the absorption liquid in the first diffusion erosion unit absorbs the gas part in the air sample, and the aerosol particles in the air sample enter the first aerosol particle collection unit middle;

[0060] Step S2. The supersaturated water vapor in the first aerosol particle collection unit is mixed with the aerosol particles, and the resulting solution passes through the first liquid filter microporous filter membrane 8 and enters the first optical property detection unit 9 and the total organic carbon analyzer 10.

[0061] (2) When the second detection s...

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Abstract

The invention relates to an online detection system and method for soluble brown carbon of atmosphere, belongs to the technical field of environment monitoring, and solves the problem that an offlinesoluble organic carbon detection system in the prior art is complex in pre-treatment, low in time resolution, low in accuracy and incapable of dependent measurement. The system comprises a first detection subsystem and a second detection subsystem, the first detection subsystem comprises a first sample feeding unit, a first diffusion corrosion unit, a first aerosol particle collection unit, a first optical property detection unit and a master organic carbon analyzer connected successively, the first aerosol particle collection unit is connected with a ultrapure water inlet pipe, and the firstoptical property detection unit and the master organic carbon analyzer are both connected with a data processing unit. The system and method can be used to detect the optical properties of soluble brown carbon in the atmosphere aerosol particles online in real time, outfield observation can be realized, and the real-time change and spatial distribution of the optical properties of the soluble brown carbon can be researched.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to an online detection system and method for atmospheric soluble brown carbon. Background technique [0002] Brown carbon is an important class of organic aerosols with light-absorbing properties, and its light-absorbing intensity increases exponentially as the wavelength becomes shorter, especially in the ultraviolet band where the photoreaction is active, the light-absorbing ability of brown carbon increases sharply. Brown carbon can affect the global radiation balance and change global radiative forcing; it can also act as cloud condensation nuclei to change the light absorption properties of clouds, thereby affecting climate; brown carbon has a complex composition and can also have negative effects on human health. [0003] The sources of brown carbon are complex, including primary emissions such as coal combustion, biomass combustion, and motor vehicle emission...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33
CPCG01N21/33
Inventor 王炜罡张文玉廉超凡葛茂发
Owner INST OF CHEM CHINESE ACAD OF SCI
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