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Title
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Electrocatalytic measurement of methionine concentration with a carbon nanotube paste electrode modified with benzoylferrocene
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Type
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JournalPaper
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Keywords
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Methionine Electrocatalysis Carbon nanotube Chemically modified electrode Voltammetry Benzoylferrocene
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Abstract
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A benzoylferrocene modified multi‐wall carbon nanotube paste electrode for the measurement of methionine (MET) concentration is described. MET electrochemical response characteristics of the modified electrode in a phosphate buffer solution of pH 7.0 were investigated by cyclic voltamme‐ try, square wave voltammetry, and chronoamperometry. Under optimized conditions, the square wave voltammetric peak current of MET increased linearly with MET concentration in the range of 1.0 × 10−7 to 2.0 ×10−4 mol/L. The detection limit was 58.0 nmol/L MET. The diffusion coefficient (D = 5.62 × 10−6 cm2/s) and electron transfer coefficient (α = 0.4) for MET oxidation were also deter‐ mined. The sensor was successfully applied for the measurement of MET concentration in human urine.
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Researchers
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Rahman Hosseinzadeh (Not In First Six Researchers), Mehdi Baghayeri (Fifth Researcher), Hassan Karimimaleh (Fourth Researcher), Farzaneh Ghorbani (Third Researcher), Alireza Mohadesi (Second Researcher), Hadi Beitollahi (First Researcher)
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