Chemistry: analytical and immunological testing – Metal or metal containing – Zn – cd – hg – sc – y – or actinides – or lanthanides
Patent
1998-05-18
1999-08-31
Bos, Steven
Chemistry: analytical and immunological testing
Metal or metal containing
Zn, cd, hg, sc, y, or actinides, or lanthanides
423 7, 423 20, 423 211, 423 215, 423 63, 423 68, 423 53, 423 54, 423 49, 423139, 423100, 423109, 423 89, 423 98, 436 82, 436 83, 436 84, 436161, 436175, 20415743, G01N 3320, G01N 100, G01N 3002, C22B 5900
Patent
active
059453427
ABSTRACT:
The present invention relates to methods for digesting diphosphonic acid substituted cation exchange resins that have become loaded with actinides, rare earth metals, or heavy metals, in a way that allows for downstream chromatographic analysis of the adsorbed species without damage to or inadequate elution from the downstream chromatographic resins. The methods of the present invention involve contacting the loaded diphosphonic acid resin with concentrated oxidizing acid in a closed vessel, and irradiating this mixture with microwave radiation. This efficiently increases the temperature of the mixture to a level suitable for digestion of the resin without the use of dehydrating acids that can damage downstream analytical resins. In order to ensure more complete digestion, the irradiated mixture can be mixed with hydrogen peroxide or other oxidant, and reirradiated with microwave radiation.
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Maxwell, III Sherrod L.
Nichols Sheldon T.
Bos Steven
Gray Bruce D.
Russell Dean W.
Westinghouse Savannah River Company
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