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About Neutron Activation Analysis (NAA)
NAA is a physical technique that is based on nuclear reactions. Samples are not pretreated - they are packaged and then irradiated in a research reactor. The samples become radioactive when neutrons interact with the nuclei of the elements’ atoms. Radioisotopes are formed and subsequently decay by emitting gamma rays that are unique in half-life and energy. These distinct energy-signatures provide positive  identification of the targeted elements present, while their intensity is proportional to the concentration of the element in the sample.
Advantages of NAA as an analytical method include:
- Sensitivity to parts-per-billion for specific elements.
- Acknowledged "referee method" - generally free of matrix effects and contamination from laboratory chemicals.
- Cost effective, timely analysis.
- High-sample volume capability.
- One simple method can analyze 30+ separate elements.
- Analysis can be customized to your precise needs.
- Processing of large (up to 40 gram) samples where sub-sampling is a concern.
- Milligram-sample analysis; where samples are precious or limited.
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Why Use NAA?
"Neutron Activation analysis is perfectly suited for routine QC, trace level contaminants as well as complete elemental characterization. It's a great alternative for matrices that don't work with other methods and also for a secondary verification of results generated by other techniques."
Dr. D. Craig Stuart, Ph.D
Sr. Scientist |
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