Hi Jools,
In the past we've obtained alumina for use as an internal standard from
this company:
Metallurgical Supply Co.
P.O. Box 12493
Houston, TX 77017
713-645-6631
http://metlabsupply.com/abrasive-powders/high-purity-alumina-powders
You can check your material against an NIST standard before use, and
evaluate it for purity. Stay away from the very fine particle sizes, as
they are not pure alpha-alumina.
Best wishes,
Dave
On 10/8/2015 6:58 PM, Matthew Rowles wrote:
Hi Jools
As for a source, I can't remember now, but the guys at CSIRO in
Melbourne just got a few kilos of a nice alumina. They might respond
to this, or I might find the emails first.
As for NIST, what I've done in the past is to calibrate my material
against the NIST material by the external standard approach. I get
most of the benefit of the standard without much of the cost.
Matthew
On 9 Oct 2015 1:30 am, "Julian Richard Tolchard"
<julianrichard.tolch...@sintef.no
<mailto:julianrichard.tolch...@sintef.no>> wrote:
Hi all,
I've been asked to do some quantification on some samples which
are predominantly silica, which means a reasonable amorphous
component is pretty much inevitable. I'm thus looking for a
suitable internal standard for spiking, but as this could be quite
a big project moving forwards i don't think the NIST standards are
financially viable. Does anyone have any good sources for spikes
to use with such light materials?
Regards,
jools
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Department of Geological Sciences
Indiana University
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812-855-2039
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