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Atomic Absorption Spectroscopy: Lab

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Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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Gamma self-shielding correction factors calculation for aqueous bulk sample analysis by PGNAA technique.

M N Nasrabadi1, A Mohammadi, M Jalali

  • 1Department of Nuclear Engineering, Faculty of Modern Sciences & Technologies, University of Isfahan, Isfahan 81746-73441, Iran. mnnasrabadi@ast.ui.ac.ir

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|March 31, 2009
PubMed
Summary

This study introduces a method for elemental analysis of aqueous samples using bulk sample prompt gamma neutron activation analysis (BSPGNAA). It details estimating the gamma self-shielding coefficient for accurate elemental concentration determination in unknown samples.

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Area of Science:

  • Analytical Chemistry
  • Nuclear Chemistry

Background:

  • Accurate elemental analysis of aqueous samples is crucial in various scientific fields.
  • Bulk Sample Prompt Gamma Neutron Activation Analysis (BSPGNAA) is a powerful technique for elemental determination.
  • A key challenge in BSPGNAA is accounting for gamma self-shielding effects within the sample.

Purpose of the Study:

  • To develop and validate a methodology for elemental analysis of unknown aqueous samples using BSPGNAA.
  • To accurately determine the gamma self-shielding coefficient for aqueous samples in BSPGNAA.
  • To enable precise elemental concentration measurements in bulk aqueous samples.

Main Methods:

  • Application of bulk sample prompt gamma neutron activation analysis (BSPGNAA) to aqueous samples.
  • Utilizing a relative method for elemental analysis.
  • Estimation of the gamma self-shielding coefficient through experimental measurements.
  • Estimation of the gamma self-shielding coefficient using MCNP code calculations.

Main Results:

  • A reliable method for estimating the gamma self-shielding coefficient of unknown aqueous samples was established.
  • The proposed methodology demonstrated the feasibility of elemental concentration determination by BSPGNAA for aqueous samples.
  • Validation of both experimental and MCNP code calculation methods for gamma self-shielding coefficient estimation.

Conclusions:

  • The developed methodology effectively addresses the challenge of gamma self-shielding in BSPGNAA for aqueous samples.
  • Accurate determination of elemental concentrations in unknown aqueous samples is achievable with this approach.
  • This work provides a valuable tool for researchers requiring precise elemental analysis of aqueous matrices.