Method and device for pre-processing X-ray fluorescence spectrum

Abstract

The invention provides a method and a device for pre-processing an X-ray fluorescence spectrum. The method comprises the following steps: acquiring target spectrum information of soil samples with preset number, wherein the target spectrum information is X-ray fluorescence spectrum information and comprises the absorbance of each wavelength; calculating ideal spectrum information according to eachabsorbance; calculating regression coefficient corresponding to each soil sample according to the ideal spectrum information and the target spectrum information of each soil sample; calculating the absorbance of each soil sample after correction according to the target spectrum information of each soil sample and the regression coefficient corresponding to each soil sample, and determining that the absorbance of each soil sample after correction is the target spectrum information of each soil sample after pre-processing. The X-ray fluorescence spectrum is pre-processed by the method providedby the invention, so that denoising of the spectrum, baseline drift and correction of light scattering can be realized, and the precision and the stability of modeling are improved conveniently.

Description

technical field [0001] The invention relates to the technical field of preprocessing, in particular to a preprocessing method and device for X-ray fluorescence spectrum. Background technique [0002] Soil is the root that provides the nutrients needed for the growth of all things. It is the most important natural resource for agricultural production. At the same time, it is also an important element of the natural environment. It is caused by various ways such as dust deposition and landfills entering the soil. Because heavy metals cannot be degraded by microorganisms and can be absorbed into the food chain through plants, they not only cause serious pollution to the soil, but also cause hidden dangers to the quality and safety of agricultural products, and also threaten human health. Therefore, the monitoring of heavy metals in farmland has become an important task for environmental protection and safe production of agricultural products. [0003] At present, the commonly...

AI Technical Summary

Problems solved by technology

There are still relatively few studies on the pretreatment of soil heavy metal XRF at home and abroad. If the soil heavy metal spectrum is used as the research object, the noise and scattering of the soil heavy metal spectrum are preprocessed before modeling, and the accuracy of the model is expected to be further improved.

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