Laser breakdown spectrographic detection method and system for metal pollutants in water body

Abstract

The water body metal pollution laser optical spectral penetration uses short pulse laser accumulation to generate high temperature ion on the water surface, excited atom, icon and molecule emitting lines of generated element component feature, through plasma spectrochemistry of the water sample to make strength analysis of the particular element line to decide the element content. The laser coupled to the emitting optical fiber through coupling lens, which receives the laser plasma signal, which is transmitted to optical spectrometer for light splitting, making photoelectric signal conversion by the CCD detector, coming into data collection and settlement system for treatment. It can be used for timely monitoring of poisonous metals.

Description

Technical field [0001] The invention belongs to environmental water pollution monitoring technology, in particular to a laser spectrum detection method and system for metal pollutants in water bodies. Background technique [0002] Heavy metals and toxic metal pollutants in water bodies are a type of typical pollutants that are easy to accumulate in sediments. They can accumulate in organisms, affect the ecological environment and affect human health through the food chain. At present, metal pollutants in environmental water bodies in my country are still mainly based on on-site sampling and laboratory analysis, and there are limited element analysis items at a time. It is impossible to analyze the content of metal elements and metal pollutants in polluted water in real time and in situ, let alone achieve it. Automatic and continuous monitoring of polluted water bodies; in harsh environments, because on-site sampling is not possible, real-time monitoring of metal element content i...

AI Technical Summary

Problems solved by technology

At present, the metal pollutants in my country's environmental water bodies are still based on on-site sampling and laboratory analysis, and there are limited items for one-time analysis of elements. Automatic and continuous monitoring of polluted water bodies; in harsh environments, real-time monitoring of metal element content is even more difficult or even impossible due to the impossibility of on-site sampling

[0003] In the monitoring of water body metal pollutants (including cadmium, chromium, lead, mercury, silver, gold, copper, zinc, iron, etc.), the content of heavy metal elements in water is mostly determined by atomic absorption method and atomic absorption photometry. The analysis procedure is complicated and time-consuming; the collection, storage, transportation and determination of samples have strict requirements, and errors in any link can cause deviations in measurement results and easily cause secondary pollution of samples, which is necessary Environmental water quality monitoring and management bring false information

In terms of the monitoring of organometallic compounds (such as organic mercury, organic cadmium, etc.), there is still no effective monitoring method at present. Therefore, it is imperative to develop fast and real-time monitoring technology and systems

Images