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* Hi Brian, 

we would also map for Cl, which is typical epoxy component. Unless your C-rich areas are also rich in Cl, you should be able to identify epoxy by high Cl signal.
Cheers,
Sergei

On Tue, Jun 12, 2012 at 9:30 PM, Brian Joy <[log in to unmask]> wrote:
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Electron Microprobe Lab, University of Minnesota

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*

Hi everyone,

I am working on an X-ray mapping project and would like to identify epoxy
that has infiltrated pore spaces and fractures in shale.  The
complications are 1) the pore spaces are typically no more than a few
microns across and 2) carbonaceous material is abundant within the
samples.  The carbonaceous material always contains some amount of sulfur,
and so it can often be distinguished by this means.  However, I would like
to unambiguously identify epoxy that has infiltrated the sample (or verify
that it hasn't infiltrated).  Does anyone have experience with adding a
tracer element (as a solute?) to epoxy for this purpose?  The
concentration of the element would need to be great enough that it could
be detected via EDS (SDD) in micron-scale pore spaces while using a
relatively short dwell time (not much longer than 20 ms, with probe
current not exceeding 100 nA).  I'd appreciate any advice.

Brian

--
Brian Joy
Electron Microprobe and ESEM Lab
Queen's Facility for Isotope Research
Department of Geological Sciences and Geological Engineering
Queen's University
36 Union Street
Kingston, Ontario K7L 3N6

cell phone: 530-220-0434
lab phone: 613-533-2595
fax: 613-533-6592

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