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  • 1 University of Illinois, 214 Nuclear Engineering Laboratory Department of Nuclear Engineering 103 South Goodwin Ave. 61801-2984 Urbana Illinois USA
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Non-destructive neutron activation analysis was employed to determine zinc in ten biological standard reference materials from the National Bureau of Standards and the National Research Council of Canada. The use of a 4 h. irradiation at a medium neutron flux allows excellent accuracies, precision and sensitivities to be attained for all the samples analyzed. It is suggested that neutron activation analysis be one of the benchmark methods for the determination of zinc in biological reference materials for concentrations as low as the one part per million level.