Accurate detection method of copper content in soil coexisting with nickel and copper by EDXRF

Abstract

The application provides a method for accurately detecting the content of Cu in soil coexisting with Ni, and belongs to the technical field of heavy metal detection of soil.The application prepares standard soil samples with different Cu contents by using soil with low Ni content, establishes a quantitative relationship model between the net peak intensity of the Cu K alpha spectrum peak and the high full width of 3 / 4, 1 / 2 and 1 / 4, respectively, realizes the 3 / 4, 1 / 2 and 1 / 4 high full width of the Cu K alpha spectrum peak and the corresponding right point information of the 3 / 4, 1 / 2 and 1 / 4 peak intensity of the soil to be detected, carries out interpolation on the spectrum information before the right 3 / 4 peak value point, obtains the complete spectrum information of the Cu K alpha characteristic spectrum peak, and realizes the accurate inversion of the Cu content in the soil to be detected by using the Cu content quantitative inversion model established based on the standard sample.The application can realize the accurate EDXRF detection of the Cu content in the soil coexisting with Ni without changing the shape of the Cu spectrum peak.

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