Radiochemical methods for selenium in biological materials

Conference · Fri Jan 01 04:00:00 EST 1988 · Transactions of the American Nuclear Society; (USA)

OSTI ID:5477730

Keydorn, K

The concentrations of selenium in many biological materials are high enough to permit determination by instrumental neutron activation analysis (INAA), so that a radiochemical separation is unnecessary. In some cases, however, a lower limit of detection or better precision may be important; in others, the highest possible accuracy is required. Here the lower standard deviations and elimination of interference that can be achieved by radiochemical methods justify the additional effort needed. Radiochemical separation of selenium may be based on: volatilization, precipitation, solvent extraction, adsorption, ion exchange, and other processes or combinations of these methods. In a comprehensive neutron activation analysis with chemical yield determination, the radiochemical separation must be preceded by a total sample decomposition in order that complete carrier equilibration can be ascertained. At the trace level of selenium concentration where both instrumental and radiochemical methods of analysis may give adequate precision, systematic differences between results are found for some matrices.

• OSTI ID: 5477730
• Report Number(s): CONF-880601--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400700 -- Radiochemistry & Nuclear Chemistry
550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
ACCURACY
ACTIVATION ANALYSIS
BIOLOGICAL MATERIALS
CHEMICAL ANALYSIS
CHEMISTRY
ELEMENTS
ION EXCHANGE
IRRADIATION
MATERIALS
QUANTITY RATIO
RADIOCHEMISTRY
RETENTION
SELENIUM
SEMIMETALS
SEPARATION PROCESSES