%0 Journal Article
%T Application of Fe3O4@SiO2/GO nanocomposite for sensitive and selective electrochemical sensing of tryptophan
%A Beitollahi
%A Hadi
%A Safaei
%A Mohadeseh
%A Shishehbore
%A Masoud Reza
%A Tajik
%A Somayeh
%J -
%D 2019
%R 10.5599/jese.576
%X Sa£¿etak A simple strategy for determination of tryptophan (TRP) based on Fe3O4@SiO2/GO nanocomposite modified graphite screen printed electrode (Fe3O4@SiO2/GO/SPE) is reported. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to characterize the performance of the sensor. The Fe3O4@SiO2/GO/SPE displayed excellent electrochemical catalytic activities. The oxidation overpotentials of tryptophan decreased significantly and its oxidation peak current increased dramatically at Fe3O4@SiO2/GO/SPE. Under the optimized experimental conditions tryptophan showed linear response over the range of 1.0-400.0 ¦ÌM. The lower detection limit was found to be 0.2 ¦ÌM for tryptophan. The practical application of the modified electrode was demonstrated by measuring the concentration of tryptophan in real samples
%K Tryptophan
%K Fe3O4@SiO2/GO nanocomposite
%K graphite screen printed electrodes
%K voltammetry
%U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=309853