Accession Number : ADA139200

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

Descriptive Note : Technical rept.,

Corporate Author : STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY

Personal Author(s) : Iwamoto,M ; Osteryoung,R A

PDF Url : ADA139200

Report Date : Jan 1984

Pagination or Media Count : 43

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)

Descriptors :   *Electrochemistry, *Voltammetry, *Amides, *Electrodes, Cathodes, Silver, Thiourea, Acetamides, Oxidation, Waves, Convection, Diffusion, Surfaces, Concentration(Chemistry), Reaction kinetics

Subject Categories : Physical Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE