I have taken EDXRF data NiZn ferrite. Oxygen is not detected due to detector limitations.Will the sum of atomic percentage of other elements be 100%?

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Irakli Javakhishvili

Dear Arpita,

The sum of concentration in XRF analysis rarely is 100%. And it depends on many reasons - standards, sample type, sample preparation quality, program, algorithm etc. If you try to detect only three elements and you have standards only on these elements and the sample "contains only (!) these elements", maybe you would get 100%.

Best regards,

Irakli

Santu Maity

Calculation of XRF and even in EDX has been done taking 100%, the element found in the detector.

Jun Kawai

Dear Arpita Sarker

You must make a guess as aFe2O3+bNiO+cZnO=100% or some other relation. Then from the XRF analysis of Fe, Ni, and Zn, you can get Fe, Ni, Zn, and O ratio, but you must include matrix effect in such a way that Ni fluorescence can excite Fe, and thus Ni intensity observed is attenuated than its true concentration, and Fe is enhanced than its true concentration, in case Ni concentration is high enough. Zn is similar.

In case you must consider aFe2O3+bNiO+cZnO+dFeO=100% , it will be much complicated. You need one more relation a:(b+c+d) ratio or some other relation.

The difference between FeNiZn ferrite and FeNiZn alloy is the presence/absence of the Compton peak of X-ray tube. If oxide, Compton is stronger, and you can estimate the oxygen concentration from the Compton intensity.

The above complicated calulation is automatically done if you select "oxide quantitative analysis" menue of a commercially available XRF spectrometer.