Method for judging heavy metal detection type of portable X-ray fluorescence spectrometry

Abstract

The invention discloses a method for judging the heavy metal detection type of a portable X-ray fluorescence spectrometry, wherein the method is mainly designed to judge the metal detection type when heavy metals in soil are detected by using PXRF. The method comprises the following steps: (1) respectively using the portable X-ray fluorescence spectrometry and a standard method for measuring the content of the heavy metals in the soil to obtain a rapid measurement value and a standard method measurement value; (2) calculating evaluation parameters according to the rapid measurement value and the standard method measurement value of the heavy metals obtained in step (1), if the calculated evaluation parameters are in a predetermined threshold range, determining that the heavy metals can be detected directly by the portable X-ray fluorescence spectrometry within a detection range; if the calculated evaluation parameters are not in the predetermined threshold range, determining that the heavy metals cannot be detected directly by the portable X-ray fluorescence spectrometry beyond the detection range.

Description

technical field [0001] The invention relates to the fields of agriculture and environment, in particular to an evaluation method for rapid detection data of heavy metal content in soil. Background technique [0002] Soil is the material basis for sustainable economic and social development, and it is related to the health of the people and the construction of ecological civilization. Heavy metals are major soil pollutants, and their hazards are well known due to their toxicity, non-biodegradability and persistence. Heavy metals can also be absorbed by plants and enter the food chain, thereby endangering human health. Therefore, rapid and effective detection of heavy metals in soil is of great significance for timely understanding of land pollution status, evaluation of remediation effects and risk assessment. [0003] However, although traditional standard soil heavy metal detection and analysis methods such as atomic absorption (AAS), atomic fluorescence (AFS), and plasma...

AI Technical Summary

Problems solved by technology

Through the miniaturization of the instrument, the application of portable X-ray fluorescence spectrometry (PXRF) detection in the monitoring of heavy metal pollution in soil is in the ascendant, but the method is not yet perfect

Compared with alloys and plastics, the sample composition of soil is more complex, and the physical state of the sample and the matrix composed of elements other than the analyzed elements have great interference on the measurement

In actual research and engineering projects, PXRF has been directly used for the determination of soil heavy metals, but for the accuracy of heavy metal detection data in the test results (that is, when using PXRF to directly detect heavy metals in soil in a certain area, what kind of heavy metals are obtained? The detection data is accurate and can be directly detected by PXRF) There is no complete and standardized judgment method

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