Atmospheric heavy-metal on-line analyzer

Abstract

The invention discloses an atmospheric heavy-metal on-line analyzer. The analyzer comprises a casing, a particle separating section, a particle collecting section, a sample transmitting section, an XRF detecting section and a processor, wherein the particle separating section is fixed to the casing and partially passes through the casing, and the particle separating section is used for separating particles in air; the particle collecting section is disposed in the casing and communicates with the particle separating section, and the particle collecting section is used for enriching sample carriers with the particles in a constant-flow work environment; the sample transmitting section is disposed in the casing and used for transmitting the sample carriers; the XRF detecting section is disposed in the casing and used for detecting the sample carriers transmitted by the sample transmitting section to the XRF detecting section; and the processor outputs analysis data according to detection results of the XRF detecting section. According to the invention, the atmospheric heavy-metal on-line analyzer is advantageous in that the analyzer overcomes a disadvantage that detection and measurement are divided into two steps in the prior art; the analyzer can complete atmospheric particle automatic monitoring tasks in fixed sites or unattended field sites; continuous, on-line, automatic monitoring is achieved; and samples needs no pretreatment.

Description

technical field [0001] The invention relates to the technical field of automatic ambient air monitoring equipment, in particular to an online analyzer for heavy metals in the atmosphere that can continuously collect heavy metals in particulate matter in the atmospheric environment online and accurately analyze the concentration of heavy metals in the particulate matter. Background technique [0002] There are two types of heavy metal pollution in the atmosphere: natural sources and man-made sources. Some heavy metal elements entering the atmosphere due to cosmic celestial bodies and various geological processes on the earth belong to natural sources. Heavy metals from man-made sources are mainly industrial production and automobile exhaust emissions. And a large amount of harmful gas and dust containing heavy metals produced by the wear of automobile tires, etc., they are mainly distributed around industrial mines and on both sides of roads and railways. The proportions of t...

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Problems solved by technology

[0004] At present, the known detection of atmospheric heavy metals adopts the method of separating the collection and measurement of heavy metals in atmospheric particles. This method, whether it is sampling or laboratory chemical analysis, has a large workload, low degree of automation, and is not suitable for long-distance detection, and if the daily average value needs to be continuously sampled for more than 12 hours, it cannot reflect the continuous time change of heavy metals, and cannot reflect the changes in severe weather such as sandstorms in real time; laboratory analysis methods require a large number of collected samples, and the samples are chemically analyzed After being destroyed, follow-up research cannot be carried out. At the same time, due to the limitation of the types of heavy metal (or metalloid) elements monitored, the collected samples can only be analyzed for one or several elements.

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