[ExI] Ants to spike

Eugen Leitl 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
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