Kurumun Atıf Alan Makalesi
Atıf Alan Yayın
An electrochemical biosensor based on human serum albumin/graphene oxide/3-aminopropyltriethoxysilane modified ITO electrode for the enantioselective discrimination of d- and l-tryptophan
Scopus
Toplam 120 atıf DOI
A new electrochemical biosensor based on the human serum albumin/graphene oxide/3-aminopropyltriethoxysilane modified indium tin oxide electrode (ITO/APTES/GO/HSA) has been developed for the discrimination of tryptophan (Trp) enantiomers. The electrode has been characterized by scanning electron microscopy (SEM) and electrochemical techniques. The electrochemical behaviors of the enantiomeric pairs (d- and l-Trp) at the ITO/APTES/GO/HSA electrode have been investigated by cyclic voltammetry in the concentration range of 0.10-1.0. mM. A clear separation between the oxidation peak potentials of d- and l-Trp, at 0.86 and 1.26. V, respectively, has suggested that the ITO/APTES/GO/HSA electrode can be used as an electrochemical biosensor for the discrimination of Trp enantiomers. In order to find the percentage of an enantiomeric form of tryptophan in a mixture, the ITO/APTES/GO/HSA electrode is used for the simultaneous detection of d- and l-Trp which showed that the percentage of one enantiomeric form can be easily measured in the presence of the other. © 2012 Elsevier B.V.
Atıf Kaynağı
Atıf Yapan Yayın
Voltammetric discrimination of mandelic acid enantiomers
Scopus
Havuzumuzda 22 atıf almış
We report a novel electrochemical biosensor for direct discrimination of d- and l-mandelic acid (d- and l-MA) in aqueous medium. The glassy carbon electrode (GCE) surface was modified with reduced graphene oxide (rGO) and γ-globulin (GLOB). Electrochemical characterization of the modified electrodes was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The modified electrode surfaces were also characterized by scanning electron microscopy. Electrochemical response of the prepared electrode (GCE/rGO/GLOB) for discrimination of d- and l-MA enantiomers was investigated by cyclic voltammetry and was compared with bare GCE in the concentration range of 2 to 10 mM. Whereas the bare GCE showed no electrochemical response for the MA enantiomers, the GCE/rGO/GLOB electrode exhibited direct and selective discrimination with different oxidation potential values of 1.47 and 1.71 V and weak reduction peaks at potential values of -1.37 and -1.48 V, respectively. In addition, electrochemical performance of the modified electrode was investigated in mixed solution of d- and l-MA. The results show that the produced electrode can be used as electrochemical chiral biosensor for MA. © 2013 Elsevier B.V. All rights reserved.
Atıf Yapan Makale Bilgileri
Kurumlar (2)
Necmettin Erbakan Üniversitesi
Meram, Turkey
Selçuk Üniversitesi
Selçuklu, Turkey