[ RadSafe ] Depleted Uranium Found In Urine 20 Years Later

[Arvic Harms]

More information on the U-234/U-238 capabilities of various forms of mass spectrometry (and alpha spectrometry!) can be found in the REIMEP 18 interlaboratory comparison report:

http://www.irmm.jrc.be/html/interlaboratory_comparisons/reimep/reimep-18/index.htm

Arvic Harms
National Physical Laboratory, UK

> -----Original Message-----
> From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl]On
> Behalf Of Brennan, Mike (DOH)
> Sent: 01 November 2007 16:08
> To: radsafe at radlab.nl
> Subject: RE: [ RadSafe ] Depleted Uranium Found In Urine 20 
> Years Later
> 
> 
> Mass spec is not my thing, so I admit to only a basic knowledge  How
> would MS, in any of its forms, differentiate between U234 and Th234? 
> 
> -----Original Message-----
> From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
> Behalf Of Olsson Mattias :MSO
> Sent: Tuesday, October 30, 2007 11:26 PM
> To: radsafe at radlab.nl
> Subject: SV: [ RadSafe ] Depleted Uranium Found In Urine 20 
> Years Later
> 
> That comment about the "old-fashioned" alpha sceptroscopy was weird.
> Disregarding the VAST dependence on the half-life of the 
> nuclide. A more
> sensitive MS should move the limit for when the MS is a better choice
> (towards shorter half-lives) but that comment smells more to me like
> arguments such as "wind power is better than old-fashioned nuclear".
> 
> /Mattias Olsson, Sweden
> 
> -----Ursprungligt meddelande-----
> 
> At 10:59 PM 10/28/2007, Roger Helbig wrote:
> >I rather wonder if the test proves that DU is there or that 
> uranium is 
> >there -- I have asked Dr Parrish what steps he has taken to preclude 
> >natural uranium being reported as being DU.  The "aerosol"
> >comment makes it sound like Parrish was not particularly 
> unbiased when 
> >he began this testing.
> ******************************
> October 29, 2007
> 
> The sector field - inductively coupled plasma - mass spectrometry
> (SF-ICP-MS) and multiple collector - inductively coupled plasma - mass
> spectrometry (MC-ICP-MS) can provide incredibly accurate 
> measurements of
> all uranium isotopes in urine including U-234, U-235, U-236, U-238. [I
> think that this method has also been applied to to plutonium isotopes,
> and it is far more accurate and precise that old-fashioned alpha
> particle energy spectra counting.]
> 
> ...
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