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Strongly acidic, 0.1\u2005M HCl, in the presence of 0.1\u2005mM Cu(II), as well as alkaline, 0.1\u2005M NaOH, solution permit successful measurement of individual amino acids, clearer separation between oxidation of Cu and Cu\u2010complexes 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.<\/jats:p>","DOI":"10.1002\/elan.201100733","type":"journal-article","created":{"date-parts":[[2012,4,20]],"date-time":"2012-04-20T11:49:59Z","timestamp":1334922599000},"page":"1047-1055","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Voltammetric Sensing of Amino Acids in the Presence of Cu(II) in Acidic and Alkaline Solutions"],"prefix":"10.1002","volume":"24","author":[{"given":"Rasa","family":"Pauliukaite","sequence":"first","affiliation":[]},{"given":"Edilson M.","family":"Pinto","sequence":"additional","affiliation":[]},{"given":"Aziz","family":"Amine","sequence":"additional","affiliation":[]},{"given":"Christopher M. 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