One more thing I should point out: the WDS simulation in PFE makes a new composition whenever a new standard is selected. However, if the sample setup does not change, the program will utilize the same composition for unknowns and wavescans.
But, only if the sample setup has *not* changed. This means that not only must the keV be the same, but also the WDS elements and any specified (non-analyzed) elements. If the sample setup has changed, the program will synthesize a random composition based on the current WDS elements.
For example, in the above zircon standard, I added Zr as a specified element to the unknown (and wavescan) sample setups, because it is present in the composition, but is not one of the WDS elements being analyzed in the simulation.
That way, once the zircon standard has run, I simply create a new unknown (or wavescan), with the previously specified element Zr, and the program does not create a random unknown (or wavescan) composition for simulation, but instead utilizes the previous standard composition.
I hope that makes sense, please let me know if not.
john