Sensitive voltammetric sensor based on polyoxometalate/reduced graphene oxide nanomaterial: Application to the simultaneous determination of L-tyrosine and L-tryptophan
Yazarlar (6)
Özlem Aktaş Yokuş
Kafkas Üniversitesi, Türkiye
Faruk Kardaş Erzincan Binali Yıldırım Üniversitesi, Türkiye
Doç. Dr. Onur AKYILDIRIM Kafkas Üniversitesi, Türkiye
Tanju Eren Pamukkale Üniversitesi, Türkiye
Necip Atar Pamukkale Üniversitesi, Türkiye
Mehmet Lütfi Yola İskenderun Teknik Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Sensors and Actuators B Chemical
Dergi ISSN 0925-4005 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce Basım Tarihi 10-2016
Cilt / Sayı / Sayfa 233 / 1 / 47–54 DOI 10.1016/j.snb.2016.04.050
Özet
In this report, a novel voltammetric sensor based on polyoxometalate (H3PW12O40, POM) functionalized reduced graphene oxide (rGO) modified glassy carbon electrode (GCE) was presented for simultaneous determination of l-tyrosine (l-Tyr) and l-tryptophan (l-Trp). The nanocomposites were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The electrochemical determination of l-Tyr and l-Trp has been studied using square wave voltammetry (SWV) on GCE modified with POM-rGO composite (POM-rGO/GCE). The developed method was also applied successfully for the simultaneous determination of l-Tyr and l-Trp in spiked serum sample and the linearity range of l-Tyr and l-Trp was 1.0 × 10−11 − 1.0 × 10−9 M with the detection limit of 2.0 × 10−12 M.
Anahtar Kelimeler
l-Tryptophan | l-Tyrosine | Polyoxometalate | Reduced graphene oxide | Sensor