Water quality heavy metal online analyzer and analysis method based on X-ray fluorescence technology

Abstract

The invention provides a water quality heavy metal online analyzer and an analysis method based on an X-ray fluorescence technology and belongs to the technical field of environment monitoring. The water quality heavy metal online analyzer comprises a water sample atomization system, a sample enrichment system, a detection system, a filter belt transmission system and a control collecting system. Atomized samples produced by the water sample atomization system are transmitted to the sample enrichment system through a silicone tube or a metal tube, the filter belt transmission system transmits enriched spots to the detection system after sample enrichment, and control of all the systems and data collection are completed automatically and coordinately through intelligent software built in the control collecting system. The water sample atomization system, the sample enrichment system, the filter belt transmission system and the detection system are connected with the control collecting system through data lines. The analysis method comprises water sample collection, atomization and sample enrichment, water sample discharge and sample test. The water quality heavy metal online analyzer and the analysis method based on the X-ray fluorescence technology have the advantages that the test limit is ultralow, and simultaneous test of multiple water quality heavy metal elements can be realized. Besides, the maintenance cost is reduced, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to an online analyzer and analysis method for heavy metals in water quality based on X-ray fluorescence technology. Background technique [0002] With the acceleration of my country's industrialization process, water pollution, especially heavy metal pollution in vast river basins, has become a major environmental problem restricting social and economic development, and it is urgent to solve it from the source. And the problem of excessive heavy metals in crops derived from it has also brought a great impact on human health. Therefore, the development of online heavy metal analyzers and analysis methods for water quality is of great significance. [0003] At present, the mainstream water quality heavy metal online analyzers on the market mainly use photometric method or anodic dissolution method. Photometric technology is relatively mature and stable. ...

AI Technical Summary

Problems solved by technology

However, the maintenance requirements of the instrument are relatively high, especially the electrode grinding maintenance, and the maintenance personnel need professional training and long-term practice to master it.

[0004] In addition, based on XRF technology, manufacturers of heavy metal detection technology in water quality currently mainly include American XOS Company, which uses X-ray single-wavelength spectroscopy technology, and can currently monitor Pb and As online, with a detection limit of 30 μg / L

However, this instrument needs to use expensive spectroscopic crystals to separate the incident X light and fluorescent signals, and is limited by spectroscopic crystals, not all elements can be detected

At the same time, the cost of the instrument is high, the optical path is relatively complicated, and the environmental adaptability is slightly poor

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