On-line analyzer and analysis method of heavy metal in water quality based on X-ray fluorescence technology

Abstract

An X-ray fluorescence technology-based on-line analyzer for heavy metals in water quality and an analysis method belong to the technical field of environmental monitoring. Water quality heavy metal online analyzer includes: water sample atomization system, sample enrichment system, detection system, filter belt transmission system and control collection system. The atomized sample produced by the water sample atomization system is transmitted to the sample enrichment system through the silicone tube or metal tube. After the sample enrichment is completed, the filter belt transmission system transmits the enriched spots to the detection system. The control of the above systems and the data collection The acquisition is automatically coordinated by the control acquisition system through the built-in intelligent software. The water sample atomization system, sample enrichment system, filter belt drive system and detection system are connected to the control acquisition system through data lines. Analysis methods include: water sample collection, atomization and sample enrichment, water sample discharge, and sample detection. The advantage is that it has an ultra-low detection limit and can realize the simultaneous determination of multiple heavy metal elements in water quality. Moreover, 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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