Facile Synthesis of Mn2O3 for Highly Active Catalytic Oxidation and Reduction of Organic Substances and Electrochemical Determination of L-Methionine
International Journal of Electrochemical Science
This paper reports the electrochemical determination of L-Methionine (L-Met) in phosphate buffer solution (pH = 7.0) utilizing the Mn 2 O 3 on screen-printed carbon electrode (Mn 2 O 3 /SPCE) and Mn 2 O 3 catalyst display excellent activity for catalytic reduction of p-Nitrophenol. Initially, as-prepared Mn 2 O 3 were characterized by various analytical methods. From the electrochemical studies bare SPCE showed an ill-defined oxidation peak around 1.214 (0.02) V for L-Met whereas Mn 2 O 3
... ereas Mn 2 O 3 /SPCE showed a well-defined oxidation peak at 1.173 (0.02) V. Under optimum conditions, the Mn 2 O 3 /SPCE showed a linear range of L-Met concentrations of 1.0 x 10 -6 to 6.1 x 10 -4 M. The limit of detection is about 1.0 x 10 -9 M (S/N = 3). The presently modified working electrode has also been effectively applied for the determination of L-Met in real sea food samples. The Mn 2 O 3 signifies user-friendly, strong and high sensitive with real applications for electrochemical determination of amino acids as well as catalytic reduction of p-Nitrophenol.