Sampling method and device for atmospheric micro-particles

Abstract

Disclosed is a sampling method for atmospheric micro-particles. The method comprises the following specific steps of pretreating a sampler; adopting the sampler for collecting data, and conducting preliminary analysis on the sampled data to obtain the initial mass concentration C1 of the micro-particles; analyzing the sample by adopting a thermo-optical carbon analyzer and applying an IMPROVE thermo-optical reflection method to obtain organic carbon (OC) data and elemental carbon (EC) data; adopting an ion chromatograph for analyzing water-soluble ions to obtain the contents of Na+, NH+4, K+,Mg2+, Ca2+, F-, Cl-, NO-3 and SO2-; reconstructing the mass concentration C2 of the micro-particles according to an IMPROVE empirical formula; correcting the data to obtain a final result. According to the sampling method, the data is obtained by the sampler, the initial mass concentration C1 of the micro-particles is obtained by dividing the mass difference by the volume, the detection result isobtained through the thermo-optical carbon analyzer and the ion chromatograph, the mass concentration C2 of the micro-particles is obtained according to the empirical formula, the data is corrected toreduce errors, and the obtained result is more accurate.

Description

technical field [0001] The invention relates to the technical field of microparticle sampling, in particular to a sampling method and device for atmospheric microparticles. Background technique [0002] Fine particles are also called fine particles, fine particles, and microparticles. Fine particulate matter refers to particulate matter in the ambient air with an aerodynamic equivalent diameter less than or equal to 2.5 microns. It can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution. Although particulate matter is only a small component of the earth's atmospheric composition, it has an important impact on air quality and visibility. Compared with coarser atmospheric particles, micro-particles have small particle size, large area, strong activity, are easy to carry toxic and harmful substances (such as heavy metals, microorganisms, etc.), and have a long residence time in the atmosphere and a long tran...

AI Technical Summary

Problems solved by technology

Compared with coarser atmospheric particles, micro-particles have small particle size, large area, strong activity, are easy to carry toxic and harmful substances (such as heavy metals, microorganisms, etc.), and have a long residence time in the atmosphere and a long transportation distance. It has a greater impact on human health and the quality of the atmospheric environment; the detection of particulate matter helps to understand the concentration and composition of pollutants in the region; analysis of the causes of pollution in order to implement reasonable methods to reduce pollution; and the detection of general particulate matter Method accuracy angle, large error

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