Cathodic Stripping Voltammetry of Thioamides on a Rotating Silver Disk Electrode.

Abstract

Cathodic stripping voltammetry at a rotating silver disc electrode has been applied for the determination of five thioamides; thioacetamide (TAA), thiourea (TU), thionicotinamide (TNA), ethionamide (ETNA), and thiosemicarbazide (TSC). Well defined oxidation waves limited by convective diffusion were found at -0.29, -0.12, -0.27, -0.15 and -0.105 V vs SCE for the five amides in a pH 9.2 borate buffer. Stripping peaks appeared at approx. -0.76 V vs SCE, approximately identical to that for S superscript 2-, which, however, produces an oxidation wave at -0.66 V vs SCE. It is suggested that the insoluble compounds formed in the electrode surface are converted to Ag2S. Linear cathodic stripping peak currents were found over a concentration range of approx. .0000001 M to .00001 M. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1984
Accession Number
ADA139200

Entities

People

  • M. Iwamoto
  • R. A. Osteryoung

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Engineering
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Diffusion Coefficient
  • Electrochemistry
  • Electrodes
  • Jet Propulsion
  • Materials
  • Materials Science
  • Military Research
  • New York
  • Physics
  • Silver Compounds
  • Square Roots
  • Sulfur Compounds
  • United States

Fields of Study

  • Chemistry

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  • Electrochemical Surface Science
  • Organic Chemistry