A method for measuring black carbon concentration and mixed state ratio in snow and ice samples

Abstract

A sampling processing device for measuring black carbon concentration and mixed state ratio in snow and ice samples, including a vacuum pump, a tee component, a movable adapter, a quartz freeze-drying container, a compressed air source, a cumulative flow meter and a flexible sampling bag. The vacuum pump and the compressed air source are connected to the movable adapter through a tee element. The movable adapter is provided with a first valve at one end close to the vacuum pump and the compressed air source. A cumulative flow meter is connected to the air path of the compressed air source for measuring the compressed air source. For the output air flow, the movable joint is connected to the quartz freeze-drying container. The end of the quartz freeze-drying container away from the movable joint is provided with a second valve. The quartz freeze-drying container is connected to the flexible sampling bag through the second valve. The sample processing device is connected to a single-particle black carbon photometer to detect the sample, which can retain the original form of black carbon in snow and ice and more accurately measure black carbon concentration and mixed state proportions.

Description

technical field [0001] The invention relates to a device and method for measuring particles in snow and ice samples, in particular to a device and method for measuring black carbon concentration and mixed state ratio in ice and snow samples. Background technique [0002] Atmospheric aerosol is a general term for solid and liquid particles suspended in the atmosphere. It is very light enough to be suspended in the air. At present, it mainly includes 6 categories and 7 types of aerosol particles, namely: dust aerosol, carbon aerosol ( black carbon and organic carbon aerosols), sulfate aerosols, nitrate aerosols, ammonium salt aerosols, and sea salt aerosols. Among them, black carbon is a common component in atmospheric aerosols. It is a product of incomplete combustion of carbonaceous substances, and generally accounts for about 20% of the mass concentration of aerosols in the atmosphere. It is of great significance in the fields of cloud physics, environmental science, and t...

AI Technical Summary

Problems solved by technology

Especially for particles that exist in the mixed state of black carbon and other components such as sulfate, melting, atomization and other processes may seriously damage the original state of black carbon in solid samples of snow and ice, thus seriously distorting the measurement results and ultimately leading to inaccurate evaluation Actual effects of black carbon in snow and ice

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