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Cathodic Stripping Voltammetry of Uracil. Experimental and Theoretical Study Under Conditions of Square‐Wave Voltammetry
Author(s) -
Mirčeski Valentin,
Skrzypek Sławomira,
Lovrić Milivoj
Publication year - 2009
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.200804392
Subject(s) - cathodic stripping voltammetry , hanging mercury drop electrode , voltammetry , electrode , square wave , chemistry , cathodic protection , adsorption , stripping (fiber) , inorganic chemistry , analytical chemistry (journal) , electrochemistry , uracil , materials science , organic chemistry , composite material , dna , biochemistry , physics , quantum mechanics , voltage
The electrode mechanism of uracil at a hanging mercury drop electrode (HMDE) is studied under cathodic stripping square‐wave voltammetric mode owing to the cathodic dissolution of a sparingly soluble compound formed between the electrode material and uracil. The experimental results can be partly explained in the light of the recent theory for cathodic stripping processes of insoluble salts under conditions of square‐wave voltammetry. It is established that the electrode reaction is complicated by attractive interactions between the deposited species of the insoluble compound. To elucidate the electrode mechanism completely a novel theoretical model is developed considering adsorption of the reacting analyte and lateral interactions between species of the insoluble compound. With the help of numerical simulations the effect of interactions is studied in detail, emphasizing the properties of the response that can be used as diagnostic criteria for recognition of the type of interaction forces. Theoretically predicted voltammetric properties agree well with the experimental results enabling clarification of the complex electrode mechanism of uracil at HMDE.