Assaying, Microscopy, Mineralogy & XRF/XRD

Assaying, Microscopy, Mineralogy & XRF/XRD 2017-03-23T09:37:54+00:00
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XRF AND MINERALOGY (5 replies)

Tobi
5 months ago
Tobi 5 months ago

How best can one determine the total elemental composition of a substance/sample after been roasted?

rgardila
5 months ago
rgardila 5 months ago

One good idea is trohugh ICP (Inductively coupled plasma mass spectrometry). 

dicksonp63
5 months ago
dicksonp63 5 months ago

For elemental analyses - agree total digestion of solids then ICP, AA, ICP-MS (any of these)

If you want to know the mineralogy/crystal structures, etc then QEMSCAN can't be beat.  The labs who perform this work typically also do XRD as a back up/check.

Sugar Watkins
5 months ago
Sugar Watkins 5 months ago
max skinner
5 months ago
max skinner 5 months ago

For total elements and percentage, ICP is tough to beat. I can do a reasonable job with my hand held XRF gun. For the actual minerals involved a person well versed with the use of a electron microscope can do a great job of mineral identification. 

inOr
5 months ago
inOr 5 months ago
1 like by Adamfocus

My understanding is that XRF is a semi-quantitative  technique.  Measurements of concentrations of elements are not very precise, so low concentrations give meaningless results.  You don't say which elements are of interest to you.  Elements with low molecular weights are indetectable.  XRF is more suited to field use, hence the market for hand-helds.  ICP and related methods are much more precise, and commercial laboratories with the proper instrumentation and expertise are commonplace.  

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