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
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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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