标题：A method based on electrodeposition of reduced graphene oxide on glassy carbon electrode for sensitive detection of theophylline
作者：Cui, F.;Zhang, X.
作者机构：[Cui, F] School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;[ Zhang, X] School of Chemistry and Chemical Engineeri 更多
通讯作者地址：[Zhang, XL]Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.
来源：Journal of solid state electrochemistry
摘要：Graphene nanosheets were directly electrodeposited onto a glassy carbon electrode (GCE) from the electrolyte solution containing graphene oxide (GO); the resulting electrode (ED-GO/GCE) was characterized with scanning electron microscopy. A simple and rapid electrochemical method was developed for the determination of theophylline (TP), based on the excellent properties of ED-GO film. The result indicated that ED-GO film-modified GCE exhibited efficient electrocatalytic oxidation for TP with relatively high sensitivity and stability. The electrochemical behavior of TP at ED-GO/GCE was investigated in detail. Under the optimized conditions, the oxidation peak current was proportional to the TP concentration in the range of 8.0 × 10~(-7) to 6.0 × 10~(-5) mol L~(-1) with the detection limit of 1.0 × 10~(-7) mol L~(-1) (S/N = 3). The proposed method was successfully applied to green tea samples with satisfactory results.