Atmospheric pollutant real-time sampling and analysis device and method

A real-time sampling technology for air pollutants, applied in sampling devices, measuring devices, analysis materials, etc., can solve problems such as poor versatility, reduced instrument sensitivity, and high temperature resistance

CN110186998APending Publication Date: 2019-08-30INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-08-30

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Abstract

The invention provides an atmospheric pollutant real-time sampling and analysis device and a method. The device comprises a particulate matters online sampling unit, an environment gas component sampling unit, a soft ionization device and a mass spectrometer; the particulate matters online sampling unit comprises an atmosphere intake pipeline, a rotary table component, a first gas guiding flexiblepipe, a sucking pump, a film heating component, a first three-way valve and a nitrogen high pressure bottle. The device and the method provided by the invention have the following advantages: (1) reactive ions with relatively high reaction activity are generated through plasmas, the reactive ions react with a compound desorbed from a sampling film, thus, analyzable sample range of the device is expanded, and method sensitivity is improved; a sample is enabled to pass through a plasma generation device, contact area and time between the sample and the plasmas can be improved, and efficiency isimproved; (2) a plurality of particulate matters sampling films are mounted on the rotary table, thus, frequency of halting and changing the films is reduced, sample collection efficiency is improved, and operation steps are simplified; (3) the particulate matters sampling films are directly heated through a honeycomb window, and particulate state sample thermal desorption efficiency is improved.
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Description

technical field

[0001] The invention belongs to the technical field of air pollution detection, and in particular relates to a device and method for real-time sampling and analysis of air pollutants. Background technique

[0002] Chemical analysis of complex compounds in air pollutants requires powerful tools. Mass spectrometry is a method for identifying the elemental composition of a compound by measuring its molecular weight, and then analyzing its structure. It has the characteristics of high sensitivity and universality, so it is especially suitable for the analysis of air pollutants. For particulate pollutants, the off-line mass spectrometry method based on membrane sampling is widely used now, that is, the particulate matter is collected on the filter membrane for 12-24 hours, the soluble matter is extracted with a solvent, and then undergoes complex pretreatment, and finally passes through chromatography. - Analyzed by mass spectrometry. Although this method can de...

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Embodiment Construction

[0052] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0053] The invention provides a device and method for real-time sampling and analysis of air pollutants, which are applied in the fields of air pollution detection and the like, and can be used for real-time collection and online analysis of particulate and gaseous pollutants in the air. The invention combines the membrane sampling equipment driven by the motor with the plasma ionization source, which has the characteristics of high degree of automation, simple operation and strong versatility, and can be combined with mass spectrometry to perform qualitative and quantita...