Hi John
A colleague showed me the attached Llovet et al 2023 paper and I am not understanding the explanation for Ni. I understand the increases from fluorescence for the Ti, Ca, and Al, but am missing how Ni can decrease. The explanation in the paper is "the decrease is explained by the lower bremsstrahlung fluorescence emitted from the sample as compared to that emitted from the
standard." Can you explain this? How is the Ni standard (the authors don't say what standard was used, which is annoying) affecting the outcome as you move incrementally toward the olivine/melt boundary? Aren't the standard effects essentially hidden since you are dividing any point in the sample by the standard to get the final concentration. Is the difference really between sample and standard or is it position on sample relative the boundary?
Perplexed....Joe