Electrocatalytic measurement of methionine concentration with a carbon nanotube paste electrode modified with benzoylferrocene
作者： Hadi BEITOLLAHI , Alireza MOHADESI , Farzaneh GHORBANI , Hassan KARIMI MALEH , Mehdi BAGHAYERI
DOI: 10.1016/S1872-2067(12)60582-8
关键词: Electrocatalyst 、 Voltammetry 、 Detection limit 、 Chronoamperometry 、 Analytical chemistry 、 Cyclic voltammetry 、 Square wave 、 Chemically modified electrode 、 Electrode 、 Chemistry
摘要: Abstract A benzoylferrocene modified multi-wall carbon nanotube paste electrode for the measurement of methionine (MET) concentration is described. MET electrochemical response characteristics in a phosphate buffer solution pH 7.0 were investigated by cyclic voltammetry, square wave and chronoamperometry. Under optimized conditions, voltammetric peak current increased linearly with range 1.0 × 10−7 to 2.0 ×10−4 mol/L. The detection limit was 58.0 nmol/L MET. diffusion coefficient (D = 5.62 10−6 cm2/s) electron transfer (α 0.4) oxidation also determined. sensor successfully applied human urine.
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