Dear Mengling,
I suppose you should contact beamline responsible and ask about beamline limitations (intensity of the beam at Tl edge, detector sensitivity, etc). Normally it is done before sending the project... Sample preparation for fluorescence, in your case should be, in general, to condense your sample as much as possible (I didnt look at your xls file!) in respect to the minerals you have...
What do you want to calculate using Hephaestus?
best regards
kicaj

W dniu 11-09-29 16:39, Mengling Yi Stuckman pisze:
Dear Ifeffit Community,
I am currently working on project "Evaluating Speciation of Thallium in Coal Fly Ash". The project was accepted by APS and we will conduct our measurement on beamline 5-BM-D.
My fly ash sample has Tl concentration ranging from 0.5ppm to 13ppm. How can I know whether the sample can generate enough photon counts if using fluorescence mode? what would be the appropriate sample preparation procedure I should follow? Is there any interference I should pay attention to?
I understand that I should use Hephaestus, but I don't know how to do that if my sample contains lots of different oxides. I attached the elemental composition in this email. Most metals should be in form of oxides, or sulfates.
Any input would be highly appreciated,
Mengling





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