Hello, I am doing x-ray dispersive (EDX) analysis for Inconel 718 alloy. I have noticed that the elements with higher concentrations in Inconel 718 ( i.e: Nickel- 53%) is providing better accuracy than elements with lower concentration (i.e: Mo- 3%) when I compare the concentration result against available literature. From here, can I come to a conclusion that EDX provides more accurate results for elements with higher concentration in a sample? Thank you!
Hi Faiyaz,
Application of EDX study is limited. It shows the elemental composition where your probe is focused not whole of the material/alloy. From EDX, we can only conclude the different kind of elements present in the material not their composition. Though it shows some percentage of the elements, its not accurate, it may be percentage of composition at that point of the material. It can not be generalized.
To calculate exact composition, you can go for XPS or ICP analysis.
Hope it helps!
For sure; try with longer counting times and your results shall improve.
By edx you can determine the elements mostly located in the surface of the sample. If you are sure that the sample is homogeneous throughout, then this method will be more reliable.
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