Compton suppression spectrometry for analysis of short-lived neutron activation products in foods |
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Authors: | D L Anderson W C Cunningham |
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Institution: | (1) Elemental Research Branch (HFS-338), U. S. Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740-3835, USA |
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Abstract: | Compton suppression spectrometry was used to analyze foods for elements with short-lived neutron activation products (half-lives
of about 2 minutes to 1.5 days). Analysis conditions were optimized to provide quality assurance analyses for iodine in FDA’s
Total Diet Study. Iodine mass fractions (0.075 to 2.03 mg/kg) were measured in 19 of 42 foods analyzed, with limits of detection
(LODs) ranging from 0.03 to 1.4 mg/kg, mostly depending on NaCl content. LODs were lowered by up to a factor of 2 for 16 elements.
Suppression factors ranged from about 2 to 8 over the energy range 400 to 3200 keV. |
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Keywords: | |
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