Determination of sampling constants for selenium by cyclic INAA

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

OSTI ID:5546554

Chatt, A; Jayawickreme, C K ^[1]

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1. Dalhousie Univ. (Canada)

Biological reference materials of natural origin and certified elemental composition play an important role in not only evaluating the reliability of a new method but also assuring the quality of data produced in routine analysis. In fact, it has become a common practice to include an appropriate certified reference material (CRM) in every batch of samples analyzed for the purpose of quality assurance. One of the most important properties of a CRM or reference material (RM) should be its degree of homogeneity. For biological materials, inhomogeneity is inherently associated with their intricate structures. In order to justify the usage of a CRM or RM at a mass lower than that recommended by the issuing agency, is necessary to evaluate the homogeneity at lower mass ranges and to determine the sampling constant for the element of interest. The objectives of the present work are to investigate the homogeneity and to calculate the sampling constants for selenium in several biological CRM and RM that are frequently used to evaluate the accuracy of measurements.

• OSTI ID: 5546554
• 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
ACTIVATION ANALYSIS
BIOLOGICAL MATERIALS
CHEMICAL ANALYSIS
ELEMENTS
MATERIALS
METABOLISM
QUALITY ASSURANCE
RELIABILITY
SAMPLE PREPARATION
SAMPLING
SELENIUM
SEMIMETALS