MULTIELEMENT ANALYSIS OF BIOLOGICAL MATERIAL BY NEUTRON ACTIVATION AND DIRECT INSTRUMENTAL TECHNIQUES. Page: 4 of 15
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greater care in sample aquisition, sample preparation and analysis to-
gether with a very sensitive analytical method.
A great deal can be learned regarding the metabolic role of a trace
element having a known biological function. Also, from the large elemental
variations which have been observed within an organism [hJ, it is evident
that the.concentration of the intra-related trace elements should be
Neutron activation analysis has provided a praccical.means.of solving
many environmental and biomedical problems which require trace element
sensitivities beyond the capability of other techniques. Previous work
has been mainly concerned with the instrumental determination of a few
specific elements or extensive multielement determinations involving
radiochemical separations prior to gamma-ray analysis [5).
The objectives of this work have been to develop and apply com-
parative methods of neutron activation analysis which permit the direct
instrumental measurement of some 20 trace elements in biological materials.
These include a large number of the biologically important elements to-
gether with several elements which have unknown biological functions.
The method involves a minimum of pre-irradiation handling, requiring
only that the sample be freeze dried prior to neutron irradiation.
Apparatus and reagents. Two irradiation facilities were employed in
this investigation. The first, the heavy water moderated PJ.utoni.um
Recycle Test Reactor (PRTR), has a rabbit system with a delivery time
of about 10 seconds, and a neutron flux of about 2x1013 n/cm2-sec with
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Rancitelli, L.A.; Cooper, J.A. & Perkins, R.W. MULTIELEMENT ANALYSIS OF BIOLOGICAL MATERIAL BY NEUTRON ACTIVATION AND DIRECT INSTRUMENTAL TECHNIQUES., report, January 1, 1968; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1033111/m1/4/: accessed April 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.