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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
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