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The electrocatalytic effect of the newly developed modified CPE towards oxidation of CySH was evaluated by comparing cyclic and differential pulse voltammograms in the presence of cysteine at bare, CoSal, SiW<jats:sub>12<\/jats:sub> and CoSal\/SiW<jats:sub>12<\/jats:sub> modified CPE. The differential pulse voltammetry method was applied as a sensitive method for quantitative detection of CySH trace amounts, the experimental conditions being optimized in order to evaluate the best analytical parameters of the sensor. Reproducibility and stability studies were also performed and the sensor was applied for the determination of CySH in a pharmaceutical sample and in human blood serum and urine samples.<\/jats:p>","DOI":"10.1002\/elan.201300235","type":"journal-article","created":{"date-parts":[[2013,7,24]],"date-time":"2013-07-24T06:13:19Z","timestamp":1374646399000},"page":"2100-2108","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["<b>Electrocatalytic Oxidation of Cysteine at a CoSalophen\/ <i>n<\/i>\u2010(butyl)<sub>4<\/sub>SiW<sub>12<\/sub>O<sub>40<\/sub> Carbon Paste Electrode<\/b>"],"prefix":"10.1002","volume":"25","author":[{"given":"Somayeh","family":"Kakhki","sequence":"first","affiliation":[]},{"given":"Esmaeil","family":"Shams","sequence":"additional","affiliation":[]},{"given":"Madalina 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