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Detecting low levels of radionuclides in fluids

United States Patent

October 3, 2000
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
An apparatus and method for detecting low levels of one or more radionuclides in a fluid sample uses a substrate that includes an ion exchange resin or other sorbent material to collect the radionuclides. A collecting apparatus includes a collecting chamber that exposes the substrate to a measured amount of the fluid sample such that radionuclides in the fluid sample are collected by the ion exchange resin. A drying apparatus, which can include a drying chamber, then dries the substrate. A measuring apparatus measures emissions from radionuclides collected on the substrate. The substrate is positioned in a measuring chamber proximate to a detector, which provides a signal in response to emissions from the radionuclides. Other analysis methods can be used to detect non-radioactive analytes, which can be collected with other types of sorbent materials.
Patch; Keith D. (Lexington, MA), Morgan; Dean T. (Sudbury, MA)
Thermo Power Corporation (Waltham, MA)
08/ 902,341
July 29, 1997
This invention was made with Government support under Contracts No. DE-AC05-91OR21949 and No. DE-AR21-95MC32088, both awarded by the Department of Energy. The Government has certain rights in this invention.