Characterization and Analytical Applications of a Coenzyme-AChemically Modified Gold Electrode
Articolo
Data di Pubblicazione:
2012
Abstract:
A gold electrode modified by chemisorption of Coenzyme A (CoA-CME) has been prepared. Exploiting its complexation
properties towards heavy metal ions usually present in natural waters, it was shown that CoA has a stronger
interaction with Cu than with the Pb and Cd; the complexation constants of bounded CoA with these ions were
calculated by a novel approach. The metal ions can be determined in natural waters at the CoA-CME by open circuit
preconcentration followed by medium exchange in citrate buffer before the anodic stripping voltammetry. The
presence in solution of competing ligands and important aspects regarding the complexation were investigated.
properties towards heavy metal ions usually present in natural waters, it was shown that CoA has a stronger
interaction with Cu than with the Pb and Cd; the complexation constants of bounded CoA with these ions were
calculated by a novel approach. The metal ions can be determined in natural waters at the CoA-CME by open circuit
preconcentration followed by medium exchange in citrate buffer before the anodic stripping voltammetry. The
presence in solution of competing ligands and important aspects regarding the complexation were investigated.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Chemically modified electrode (CME); Coenzyme A; Copper; Cadmium; Lead
Elenco autori:
Merli, Daniele; Francesca, Zavarise; Tredici, ILENIA GIUSEPPINA; Pesavento, Maria; Profumo, Antonella
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