Electrodeposition as an alternate method for preparation of environmental samples for iodide by AMS

Journal Article · Wed Mar 25 00:00:00 EDT 2015 · Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms

DOI:https://doi.org/10.1016/j.nimb.2015.03.015· OSTI ID:1294410

Adamic, M. L. ^[1]; Lister, T. E. ^[1]; Dufek, E. J. ^[1]; Jenson, D. D. ^[1]; Olson, J. E. ^[1]; Vockenhuber, C. ^[2]; Watrous, M. G. ^[1]

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1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
2. ETH Zurich, Zurich (Switzerland)

This paper presents an evaluation of an alternate method for preparing environmental samples for ¹²⁹I analysis by accelerator mass spectrometry (AMS) at Idaho National Laboratory. The optimal sample preparation method is characterized by ease of preparation, capability of processing very small quantities of iodide, and ease of loading into a cathode. Electrodeposition of iodide on a silver wire was evaluated using these criteria. This study indicates that the electrochemically-formed silver iodide deposits produce ion currents similar to those from precipitated silver iodide for the same sample mass. Furthermore, precipitated silver iodide samples are usually mixed with niobium or silver powder prior to loading in a cathode. Using electrodeposition, the silver is already mixed with the sample and can simply be picked up with tweezers, placed in the sample die, and pressed into a cathode. The major advantage of this method is that the silver wire/electrodeposited silver iodide is much easier to load into a cathode.

• Research Organization: Idaho National Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: IN13-AMS255-PD3TE
• OSTI ID: 1294410
• Alternate ID(s): OSTI ID: 1246205
• Report Number(s): INL/JOU-14-31377; PII: S0168583X15002153
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, Vol. 361, Issue C; ISSN 0168-583X
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
radioiodine
accelerator mass spectrometry
AMS
electrodeposition
129I-AMS sample preparation
129I