Method for performing particle source analysis by using single-particle aerosol mass spectrometer

A single-particle mass spectrometry and single-particle technology, which is applied in particle suspension analysis, particle and sedimentation analysis, particle size analysis, etc., can solve problems such as difficulty in solving secondary source contributions, insufficient utilization of single-particle mass spectrum characteristics of pollution sources, etc., and is easy to promote Applied effect

Inactive Publication Date: 2018-10-19
NANKAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current single particle source apportionment algorithm does not fully utilize the single particle mass spectrum characteristics of pollution sources, and it is difficult to solve the problem of secondary source contribution. Based on the KNN classifier and the CMB model, a new single particle source apportionment is proposed algorithm

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  • Method for performing particle source analysis by using single-particle aerosol mass spectrometer
  • Method for performing particle source analysis by using single-particle aerosol mass spectrometer
  • Method for performing particle source analysis by using single-particle aerosol mass spectrometer

Examples

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Effect test

Embodiment 1

[0055] In this example, the environmental receptor single particle data collected in January 2017 and the pollution source mass spectrometry data collected by a single particle aerosol mass spectrometer were used to analyze the source contribution of the environmental receptor using the KNNCMB model, and combined with meteorological conditions (relatively humidity, wind speed) and pollution level (PM 2.5 concentration) to evaluate the feasibility and scientific validity of the method. figure 1 For the technical roadmap, the specific steps are as follows:

[0056] 1. Construct a comprehensive spectrum library of single particle mass spectrometry of pollution sources. The comprehensive spectrum library of single particle mass spectra of pollution sources includes a library of single particle mass spectra of pollution sources and a library of characteristic mass spectra of pollution sources.

[0057] (1) Construction of single particle mass spectrum library of pollution sources...

Embodiment 2

[0067] In this example, the single particle data of environmental receptors collected from June 10 to 20, 2017 and the mass spectrometry data of pollution sources collected by single particle aerosol mass spectrometer were used to analyze the source contribution of environmental receptors by using the KNNCMB model. Combining meteorological conditions (relative humidity, wind speed) and pollution levels (PM 2.5 concentration) to evaluate the feasibility and scientific validity of the method. See attached figure 1 The technical roadmap, the specific steps are as follows:

[0068] 1. Construct a comprehensive spectrum library of single particle mass spectrometry of pollution sources. The comprehensive spectrum library of single particle mass spectra of pollution sources includes a library of single particle mass spectra of pollution sources and a library of characteristic mass spectra of pollution sources. Same as Case 1.

[0069] 2. Use the SPAMS single particle aerosol mass...

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Abstract

The invention provides a method for performing particle source analysis by using a single-particle aerosol mass spectrometer and relates to the field of atmospheric particle source analysis. Accordingto the method, a KNN (K Nearest Neighbor) classifier and a CMB (Cosmic Microwave Background) source analysis model are combined, single-particle mass spectrometry information of the pollution sourceas well as environmental receptor single-particle mass spectrometry characteristic and particle size information are fully utilized, the contribution of the primary emission source and secondary emission source of the particles on single environmental receptor particle can be rapidly solved, and refined source analysis results with high time resolution and high particle size resolution can be obtained. The method has excellent popularization and application prospects.

Description

technical field [0001] The invention relates to the field of source analysis of atmospheric particles, in particular to a method for fine source analysis of atmospheric particles using a single-particle aerosol mass spectrometer. Background technique [0002] The increase in the concentration of particulate matter is the main internal factor of pollution processes such as haze. Under unfavorable meteorological conditions, the PM 2.5 Some regional heavy haze caused by pollution can last for several days (5-10 days), and the continuous heavy pollution process has also become a major threat to urban ambient air quality, atmospheric visibility, and residents' human health. For heavily polluted weather, the formulation of emergency plans should be based on scientific analysis and analysis of pollution sources to identify the root causes and key links of urban heavy pollution. This requires us to quickly and accurately analyze the causes of heavy pollution and quickly and accurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01N15/06G06K9/62
CPCG01N15/0266G01N15/0656G06F18/23213G06F18/22
Inventor 冯银厂徐娇史国良王玮
Owner NANKAI UNIV
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