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Analytically useful stripping voltammetric behavior of technetium at a thenoyltrifluoroacetone‐modified carbon paste electrode
Author(s) -
Dick Renate,
Ruf Heinz,
Ache Hans J.
Publication year - 1989
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140010113
Subject(s) - thenoyltrifluoroacetone , electrode , stripping (fiber) , chemistry , technetium , inorganic chemistry , anodic stripping voltammetry , electrolysis , voltammetry , analytical chemistry (journal) , electrochemistry , nuclear chemistry , materials science , chromatography , extraction (chemistry) , solvent extraction , electrolyte , composite material
The preconcentration voltammetric behavior of technetium at a carbon paste electrode modified with thenoyltrifluoroacetone (TTA) has been investigated. It is demonstrated that enrichment of technetium on the electrode surface by complex formation with TTA is possible. Deposition of Tc(IV) takes place due to a purely chemical reaction resulting probably Tc(TTA) 4 . Enhanced accumulation occurs if a reductive electrode potential of −0.4 V is applied, which presumably causes fixation in the form of Tc(TTA) 3 . In the subsequent voltammetric scan a characteristic peak at about −40 and +40 mV, respectively, is obtained. Tc(VII) is not deposited, unless a reduction potential of at least −0.6 V is applied, with the pH of the solution optimally chosen at 3.5. Therefore, it is possible to discriminate between Tc(IV) and Tc(VII).