How is spectral analysis of metals and alloys carried out?
Spectral analysis is intended to determine the elemental composition of materials. It is used to control the quality of metallurgical production. In addition, spectral analysis of metals and alloys used in scientific research to study the properties of new materials and develop technologies for their production. In the automotive industry, this procedure is necessary to check the quality of parts used in critical components and mechanisms, which guarantees their reliability and durability.
Research methods
- Emission spectrometry. It is based on analysis of the spectrum of radiation emitted by excited atoms of the sample. The source of their awakening can be an electric arc, a spark, or a laser. Each element has a unique emission spectrum, which makes it possible to determine and quantify its content.
- Absorption spectrometry. The sample is first sprayed into a graphite cell, and then light of a specific wavelength is passed through it. The amount of absorption is proportional to the concentration of the element.
- X-ray fluorescence analysis. Uses x-rays to excite atoms in a sample. Returning to the ground state, they emit secondary radiation, the spectrum of which is also unique for each element. This method allows for non-destructive testing of solid samples, which is especially valuable in many applications.
Directly metal spectral analysis includes sample preparation, excitation or sputtering of the sample, recording and studying the spectrum, as well as processing the obtained data to determine the elemental composition. Important factors influencing the results are the choice of optimal excitation conditions, calibration of the instrument using standard samples, and correction of matrix effects.
