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Gold/Mining/Energy : International Precious Metals (IPMCF) -- Ignore unavailable to you. Want to Upgrade?


To: go4it who wrote (24138)11/3/1997 11:28:00 PM
From: E. Charters  Read Replies (1) | Respond to of 35569
 
not true.. its the boron in the sands that kills it. but that is only if you do a direct nuclear reactor neutron bath assay on the dirt. If you do an extraction with NiS then it don't matter. radio species in the dirt are likely polonium forming as dust from radon. Mme. Curie's ghost.



To: go4it who wrote (24138)11/4/1997 6:27:00 AM
From: Aurum  Read Replies (1) | Respond to of 35569
 
Chuck, the dirt would have to be extremely "hot" to cause any problems, in which case there would be enormous environmental problems in mining the stuff. If the background radiation did interfer (and I can't see how it could) there are various standard analytical chemistry techniques which would correct nearly all interferences. Such techniques are: blank samples, standard additions.



To: go4it who wrote (24138)11/4/1997 8:45:00 AM
From: Zeev Hed  Read Replies (1) | Respond to of 35569
 
Chuck: Neutron activation gives you a very specific wavelength gama ray for each nucleous activated, unless the background is extremely high, even minute (sub PPM) concentrations are detectable. When you want to detect even lower level you can increase the neutron flux and the exposure time to get even higher sensitivity.

Zeev