Environmental aerosol direct sampling gathering sample injecting device and quantitative analysis method

Abstract

The invention discloses an environmental aerosol direct sampling gathering sample injecting device and a quantitative analysis method. The environmental aerosol direct sampling gathering sample injecting device comprises an environmental aerosol sampling module, an aerosol atomization dissolving generation module, an aerosol condensation growing up module, an aerosol number concentration gathering module and a base body gas removing module. The environmental aerosol sampling module comprises a sampling port, a sampling pump and a connection pipeline, preferably, the sampling pump is a membrane pump; the aerosol atomization dissolving generation module comprises an atomizer, a fog chamber, a drying device and a connection pipeline, the atomizer is used for atomizing a standard solution to generate fog drops, the fog room is used for removing large fog drops and the drying device is used for dissolving the fog drops output from the fog room and removing steam contained in the fog drops. Due to the mode that the environmental aerosol direct sampling gathering sample injecting device serves as an aerosol sample injection system and is used in cooperation with an ICP-MS, quality sample injection rate of an element to be measured in environmental aerosol can be measured quantitatively, and then sample injection volume flow of the environmental aerosol is divided by the quality sample injection rate to acquire the quality volume concentration of the element to be measured.

Description

technical field [0001] The invention belongs to the intersecting field of mass spectrometer and aerosol analysis technology, and specifically relates to an environmental aerosol direct sampling and enrichment sampling device and a quantitative analysis method, which can be used as an aerosol sampling system for an inductively coupled plasma mass spectrometer. Rapid, sensitive and accurate online quantitative monitoring of aerosols. Background technique [0002] Aerosol refers to solid or liquid particles that are stably suspended in gas, and plays an important role in the fields of environmental climate, medicine and health, semiconductor electronics, national security, etc. Monitoring the composition, concentration and change trend of aerosol is an important Basis for research and control. Inductively coupled plasma mass spectrometer (ICP-MS) is a powerful aerosol monitoring analysis method, which can be used for aerosol offline monitoring and online monitoring. When perf...

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Problems solved by technology

[0006] 1) In order to ensure the ventilation effect, the flow rate of aerosol flowing through a single set of gas displacer should not be greater than 250ml / min. If the sampling flow rate of ambient aerosol is 1L / min, at least four sets of gas displacers should be connected in parallel. increased complexity;

[0007] 2) Since the metal gas or atomized de-dissolved aerosol is introduced into the pipeline from the downstream outlet of the gas displacer, the transmission loss of the aerosol in the displacer cannot be corrected, and the quantitative analysis cannot be fully realized. The online monitoring results are better than the offline sampling monitoring results low

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