Voltammetric Sensing of Amino Acids in the Presence of Cu(II) in Acidic and Alkaline Solutions
| Autor: | Rasa Pauliukaite, Christopher M.A. Brett, Aziz Amine, Edilson M. Pinto |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Hydrolyzed protein 010401 analytical chemistry Inorganic chemistry chemistry.chemical_element Electrolyte 010402 general chemistry Electrochemistry 01 natural sciences Copper Decomposition 6. Clean water 0104 chemical sciences Analytical Chemistry Amino acid chemistry Electrode Linear sweep voltammetry |
| Zdroj: | Electroanalysis. 24:1047-1055 |
| ISSN: | 1040-0397 |
| DOI: | 10.1002/elan.201100733 |
| Popis: | A number of amino acids have been determined at carbon film electrodes in the presence of copper. Strongly acidic, 0.1 M HCl, in the presence of 0.1 mM Cu(II), as well as alkaline, 0.1 M NaOH, solution permit successful measurement of individual amino acids, clearer separation between oxidation of Cu and Cu-complexes occurring in alkaline solution. Electrochemical impedance showed that Cu(II) facilitates charge transfer, particularly in alkaline medium. Square wave voltammetry with preconcentration increased the response compared to linear sweep voltammetry. Protein hydrolysis rates were monitored through determination of amino acids produced by decomposition, injecting samples into alkaline electrolyte solution. |
| Databáze: | OpenAIRE |
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