[ExI] Ants to spike
eugen at leitl.org
Wed Oct 21 16:02:36 UTC 2009
On Wed, Oct 21, 2009 at 11:47:29AM -0400, Brent Neal wrote:
> Clearly, you've never used an XRF. :) Less than 2 minutes of sample
I have. I just don't have one in the house right now. Can I borrow yours?
> prep (load powder or flak into PP vial) and about 2 minutes of scan
> time. Look for lead peak. Done. XRF is widely used in industry for
> quick assay, especially in environmental analyses. Just cause its
> "instrumentation" doesn't make it complicated! Spectroscopy is well-
> accessible to a citizen scientist.
> Also, you need more than eye for lead chromate, because how will you
> tell it from other blue pigments?
That's because if it's an old house with oil paint which looks
like this http://images.google.com/images?q=lead chromate
there aren't too many options.
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org
8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE
More information about the extropy-chat