Journal of Radioanalytical Chemistry

, Volume 20, Issue 1, pp 17–26 | Cite as

Neutron activation analysis of traces of gold in pure silver using sulfur as a preconcentration agent

  • A. Hirose
  • D. Ishii
Article

Abstract

In this method for the determination of traces of gold in silver, the sulfur produced by decomposition of silver (matrix) sulfide precipitate with nitric acid was used as a preirradiation concentration agent. As the activated sulfur does not interfere with the γ-ray spectrometry, the γ-radioactivity of198Au in the activated sulfur sample was counted directly with a Ge(Li) detector without post-irradiation chemical treatment. The chemical yield of gold was more than 99%, and the concentration factor was 5–6·103. The analytical results of gold in 99.9 and 99.999% silver were 1.6–2.5 and 0.015–0.024 ppm, respectively.

Keywords

Nitric Acid Neutron Activation Analysis Concentration Factor Chemical Yield Lead Sulfide 

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Copyright information

© Akadémiai Kiadó 1974

Authors and Affiliations

  • A. Hirose
    • 1
  • D. Ishii
    • 1
  1. 1.Department of Applied Chemistry, Faculty of EngineeringNagoya UniversityNagoyaJapan

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