By the way, we are actually analysing Slag and slag inclusions (iron
metallurgy) with our XRF and µXRF set up on our rotating anode generator and
we would like to test some references.
Does anyone kow where I can find
- iron slags references (for trace elements (about 10 - 100 ppm))
- iron slag references for small beams (about 10 x 10 µm2) ???
Philippe Dillmann
-----Message d'origine-----
De : Arch-Metals Group [mailto:[log in to unmask]] De la part de
Aaron Shugar
Envoyé : lundi 19 septembre 2005 19:14
À : [log in to unmask]
Objet : Re: Handheld XRF
Rob,
This is a bit more difficult to answer. As David said, detection is element
dependent so the limits will vary. I have a few papers on the limits of the
different machines if you are interested I can send you a copy of them.
There are different setting that these machines can be set for. In their
bulk
chemical analysis they function very much as David describes, as a
metal sorter
classifying metal types (i.e. 1010 iron, 304/303 Stainless steel, Ni rich Cu
etc) In This setting your results are normalized to 100%. But the
machines can
also be programed for thin film, or trace element analysis (soil
analysis). In
this setting the machine is calibrated with standards and can read very low
levels accurately (i.e. reported detection limit for As 15PPM for Pb 25PPM
on
the Oxford Instruments model). Again, a word of caution, portable XRF's are
wonderful tools, but are not the Saviour for quantitative analysis. They are
wonderful for doing survey scans of a large number of similar objects to
identify oddities, but not ideal as your only chemical analytical tool for
quantitaive, or even semi-quant work.
Aaron
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