Abstract
The article describes a nonlinear theory of how the presence of third elements affects the results of analyzing the elemental composition of substances by means of atomic emission spectroscopy. The theory is based on the assumption that there is an arbitrary relationship between the intensity of the analytical line of the analyte and the concentration of impurities and alloying elements. The theory has been tested on a simulation problem using commercially available equipment (the SPAS-05 spark spectrometer). By comparing the proposed algorithm with the traditional one, which assumes that there is a linear relationship between the intensity of the analytical line of the analyte and the intensities of the spectral lines (or concentrations) in the substance, it was revealed that there is a severalfold decrease in the deviations of nominal impurity concentrations from the measured ones. The results of this study allow for reducing the number of analytical procedures used in analyzing materials that have different compositions and the same matrix element. For instance, it becomes possible to determine the composition of iron-based alloys (low-alloy and carbon steels; high-speed steels; high-alloy, and heat-resistant steels) using one calibration curve within the framework of a universal analytical method.
Highlights
Atomic emission spectroscopy (AES) is one of the most common methods for determining the elemental composition of materials, which largely influences their physicochemical properties, and their performance characteristics [1–5].The basic principle of AES consists of atomizing the substance being analyzed by one method or another and promoting the resulting atoms to an excited state
It was assumed that the relationship between the effects produced by these elements and the intensities of their analytical lines could be described as a Gaussian function
This assumption is justified by the fact that we foundation for the proposed theory: considered a case of samples with small amounts of impurities, which makes it
Summary
Atomic emission spectroscopy (AES) is one of the most common methods for determining the elemental composition of materials, which largely influences their physicochemical properties, and their performance characteristics [1–5]. The basic principle of AES consists of atomizing the substance being analyzed by one method or another and promoting the resulting atoms (or ions) to an excited state. By measuring the intensities of the spectral lines of various elements, one can find their concentrations in the substance. The relative intensity of the analytical line is determined to eliminate the effect of the variability in the parameters of the spectrometer system on measurements. Various types of atomic emission spectrometers have been developed and are commercially available.
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