Re: Flourimeter

["Elizabeth M. Brackett" <brackett@bright.net>]

This technique gives you a mass concentration, not activity.  Some DOE
sites were still using this method a few years ago; I'm not sure if that's
still the case.  ANSI N13.22-1995, Bioassay Programs for Uranium, discusses
this method briefly in an appendix and references some documents that might
contain more details:
Sedlat, J. Emergency bioassay methods, in: Lanzl,LH; Pingel, JH; Rust, JH,
eds. Radiation accidents and emergencies in medicine, research and
industry. Springfield, IL: Charles C. Thomas; 1965: 70-81.
Sedlat, J.; Fariman, WD; Robinson, JJ.  Rapid methods of determining
internal radioactive contamination, in: Personnel dosimetry for radiation
accidents.  Vienna, Austria  IAEA STI/PUB/99, 1965: 395-411.
Gautier, MA, ed. Radiobioassay chemistry analytical techniques. LANL, 1993.

You might also try contacting the labs at Paducah or Portsmouth.

Liz Brackett

At 10:33 AM 3/31/2000 -0600, you wrote:
>
>I don't know anything about this technique, but isn't it the other way
around.
>I.e., the results tell you the activity concentration, but without isotopic
>ratios you don't know the mass concentration?
>
>Brian R. Gaulke, CHP
>Brian_Gaulke@hc-sc.gc.ca
>
>
>"Tony Harrison" <laharris@smtpgate.dphe.state.co.us> on 2000/03/31 10:23:33
>
>Subject:  Re: Flourimeter
>
>Uranium by fluorimetry works very well down to approximately 3 micrograms per
>liter.  The drawback for HP types is that it works for total uranium, by
which I
>mean that no isotopic info is available.  To convert to activity you have to
>know (or assume) something of the isotopic ratios.
>

******************************
  Elizabeth M. Brackett, CHP 
     Sr. Health Physicist     
     MJW Corporation, Inc.       
       (330) 644-3757        
  mailto:brackett@bright.net 
******************************
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