Laser-induced test method for heavy metal chromium element in soil

Abstract

The present invention specifically relates to a laser-induced test method for soil heavy metal chromium, the steps of which are as follows: step 1, configure a gradient concentration of chromium chloride solution, then weigh a plurality of standard soils of the same quality as a mixture, and mix chromium chloride with The standard soil is mixed to obtain multiple gradient standard soils; step 2, using laser induction technology to test the iron element spectral intensity and chromium element spectral intensity of the gradient standard soil, and the chromium element concentration and iron element concentration in the standard soil; step 3, using laser induction Technically test the soil to be tested to obtain the spectral intensity of iron element, spectral intensity of chromium element and the intensity ratio of chromium element to iron element; step 4, mix the standard soil with the soil to be tested to obtain a mixed soil, and use laser induction technology to test the iron element The spectral intensity and the spectral intensity of the chromium element; step 5, the spectral intensity of the chromium element in the soil to be measured is obtained through comparison and calculation. The detection method provided by the invention is simple and fast, has high accuracy and small error.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a laser-induced test method for soil heavy metal chromium. Background technique [0002] At present, heavy metals are "a class of pollutants" in the environment. With the rapid development of social economy, the degree of pollution and the area of ​​pollution are increasing year by year. Once the soil is polluted by heavy metals, it will be enriched and magnified through the food chain and ultimately affect human health. Therefore, both domestic and foreign countries are very concerned about the monitoring and treatment of heavy metal pollution in soil. [0003] There are various types of soil heavy metal elements, and their background values ​​in the environment and the critical values ​​stipulated in the "China Soil Environmental Quality Standards" are different. It is very difficult to analyze soil heavy metals at the same time using traditional methods, and usually...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art, the present invention provides a laser-induced test method for heavy metal chromium in soil, which is simple and fast, has high accuracy and small error, and solves the problem of poor stability of laser detection at present

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