Rapid detection method for hexavalent chromium in water environment based on machine learning

Abstract

The invention relates to a method for quickly detecting Cr < 6 + > in a water environment based on machine learning. The method comprises the steps of preparing a series of Cr < 6 + > standard solutions with concentration gradients in an acid medium; preparing a DPCI solution by taking DPCI as a color developing agent; selecting a plurality of groups of Cr < 6 + > solutions from the Cr < 6 + > standard solution to respectively react with the DPCI solution, measuring the absorbance, and determining the linear range of color development; preparing Cr < 6 + > solutions with corresponding concentrations on the basis of the obtained linear ranges, subjecting all the solutions to color development reaction with the DPCI solution, and after color development is stable, placing the solutions in adark box to take a plurality of pictures; based on the obtained pictures, obtaining multiple types of picture sample sets corresponding to the concentrations so as to establish a regression model forprediction; and based on the established regression model, carrying out Cr < 6 + > concentration detection on a to-be-detected sample solution. The method is beneficial to simply and quickly detecting the concentration of Cr < 6 + > in an unknown sample solution.

Description

technical field [0001] The invention belongs to the field of environmental detection, in particular to a machine learning-based detection of Cr in a water environment 6+ rapid detection method. Background technique [0002] Industrial pollution is mostly discharged into the environment through waste residue, waste water, and waste gas. Hexavalent chromium in the water environment will be continuously enriched through the food chain and eventually enter the body of humans and animals, thereby causing great harm to the environment and human health. Many studies have confirmed that hexavalent chromium compounds are toxic, carcinogenic and induce gene mutation. Chromium compounds can damage the synthesis of deoxyribonucleic acid, among which potassium dichromate is particularly prominent. Chromium compounds also have carcinogenic, mutagenic and cytogenetic effects. Toxicity; hexavalent chromium can precipitate certain proteins in human blood, causing anemia, nephritis, neuritis...

AI Technical Summary

Problems solved by technology

[0003] Traditional methods for detecting hexavalent chromium include: flow injection spectrometry, fluorescence spectrometry, atomic absorption spectrometry, etc. These methods have the characteristics of high sensitivity and good reproducibility, but due to factors such as expensive instruments and the need for professionals to operate, they are not Facilitate on-site real-time monitoring

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