Atmosphere on-line mercury analyzing instrument with light trap assembly

Abstract

The invention relates to an atmosphere on-line mercury analyzing instrument with a light trap assembly. The atmosphere on-line mercury analyzing instrument with the light trap assembly is characterized by comprising a light source, a light source cavity, an entrance lens, an entrance slit, a light cavity, a photoelectric detector seat and a light trap, wherein the light source is longitudinally fixedly arranged in the light source cavity; light emitted from the light source is spread in the light source cavity and is transmitted to the entrance lens which is fixedly connected to one side of the light source cavity; light exiting from the entrance lens is transmitted to the light cavity via the entrance slit; an air inlet and an air outlet are respectively correspondingly formed in the top and the bottom of the light cavity; a fluorescent window is formed in one side of the light cavity; a light filter is fixedly arranged on the fluorescent window; the photoelectric detector seat for placing a photoelectric detector is arranged at a light exiting position corresponding to the fluorescent window; the photoelectric detector is used for detecting atomic fluorescence which is generated by stimulating a gaseous mercury sample through a light source; and incident light exiting from the light cavity enters the light trap and is absorbed. The atmosphere on-line mercury analyzing instrument with the light trap assembly can be widely used for monitoring the total concentration of gaseous mercury in atmosphere.

Description

technical field [0001] The invention relates to an atmospheric online mercury analysis instrument with an optical trap component for long-term monitoring of the concentration of total gaseous mercury (TGM) in the atmosphere, and relates to the technical field of atmospheric monitoring. Background technique [0002] Mercury and its compounds are a kind of elemental gas with biological toxicity, and the main composition form is gaseous elemental mercury (TGM) in the atmosphere. Mercury pollutants in the atmosphere have physical properties such as inertness, insolubility, and volatilization again after sedimentation. They can stay in the atmosphere for more than one year, and are prone to long-distance transmission and cross-border pollution. At the same time, they have relatively high biological toxicity. It deserves strong attention. Quantitative analysis of gaseous mercury in the atmosphere is mainly divided into enrichment and analysis. The enrichment method mainly adopts...

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Problems solved by technology

At present, although these instruments can achieve the same accuracy as offline observation, but because their main focus is on fixed-point observation of the environment, most of the instruments are relatively large and heavy in terms of volume and weight, which is not convenient for mobile observation. Commercial Instruments for Observing Atmospheric Mercury

[0004] At present, the research on the monitoring of atmospheric gaseous mercury mainly focuses on fixed-point monitoring and emission source monitoring. Concentration observation largely relies on the selection of sampling sites, and can only do research on fixed-point time series changes. For the study of spatial distribution changes, Due to the limitations of the size, weight and conditions of use of the current observation instruments, it is still difficult to carry out similar work

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