Real-time online optical measurement device and measurement method for metal elements in water body

Abstract

The invention discloses a water body metallic element real-time online detecting device. In the invention, high voltage is utilized to realize gas breakdown between a water sample to be detected and a metal anode, atmosphere pressure plasma is produced, metallic elements in the water sample enters into the plasma and are excitated to a high energy level under the action of high energy particles of the plasma and emit respective characteristic atomic spectrums in a process of transiting to a ground state from the high energy level, and selection of the metallic element characteristic atomic spectrums is realized by converting transmission wavelength of a narrow band pass filter. The types of the metallic elements in the water body are determined by analyzing wavelengths of spectrum lines, and information of element concentration can be obtained by analyzing intensity of the spectrum lines. In the invention, real-time online discriminant analysis on multiple metallic elements in the water body sample can be realized by adopting only one device, thus a detection analysis program is greatly shortened and detection efficiency and measuring accuracy are improved; and the water body metallic element real-time online detecting device disclosed by the invention is applicable to metallic ion detection of drinking water source, an industrial drain outlet and the like.

Description

technical field [0001] The invention relates to the detection and analysis of the water environment, in particular to a real-time on-line optical measurement device for metal elements in the water body. Background technique [0002] Water is an important basis for all life in nature and one of the essential substances for human survival and development. However, due to human activities and the development of industry and agriculture, various water pollution problems have received more and more widespread attention, and metal residues in water, especially heavy metal pollution, have become increasingly serious. Heavy metals such as mercury, chromium, cadmium, lead and other residues are gradually enriched in the water environment, and enter the body of consumers through the food chain for long-term excessive accumulation, posing a great threat to human safety. A large amount of environmental monitoring data needs to be provided during the treatment process. How to monitor an...

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Problems solved by technology

This method only needs a simple working electrode, reference electrode, electrolytic cell and recording device. It has a fast detection speed and is suitable for on-site...

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