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Enhanced sensitivity for the determination of selenium by INAA
1IAEA Laboratories Seibersdorf, International Atomic Energy Agency, Vienna, Austria.
Biological Trace Element Research
|January 1, 1994
Summary
This study presents a new analytical method for determining selenium using instrumental neutron activation analysis (INAA) and gamma spectrometry. The method offers efficient and reliable selenium measurements, suitable for various applications.
Area of Science:
- Analytical Chemistry
- Nuclear Chemistry
- Environmental Science
Background:
- Accurate selenium determination is crucial for environmental monitoring and biological studies.
- Instrumental Neutron Activation Analysis (INAA) is a sensitive technique for elemental analysis.
Purpose of the Study:
- To develop and validate a robust analytical procedure for selenium determination.
- To utilize gamma spectrometry with a germanium well-type detector for enhanced sensitivity.
Main Methods:
- Instrumental Neutron Activation Analysis (INAA).
- Gamma spectrometry utilizing the 400.7 keV spectral line.
- Energy summing in true coincidence of cascade photons.
Main Results:
- The developed method provides high efficiency and interference-free selenium results.
- Potential challenges include increased count rates, pile-up losses, decreased resolution, and geometric sensitivity.
- Successful application in reference material certification, biomonitoring, and protein analysis.
Conclusions:
- The INAA method with gamma spectrometry is a reliable technique for selenium quantification.
- The method's advantages outweigh its drawbacks for specific analytical challenges.
- This procedure is applicable to diverse fields requiring precise selenium measurements.