Electrochemical Detection of Cadmium and Lead in Rice on Manganese dioxide Reinforced Carboxylated Graphene Oxide Nanofilm

Authors : İlknur ÜSTÜNDAĞ, Aslı ERKAL, Zafer ÜSTÜNDAĞ, Ali Osman SOLAK

Pages : 96-109

View : 23 | Download : 16

Publication Date : 2018-12-24

Article Type : Research Paper

Abstract :Manganese dioxide decorated carboxylated graphene oxide insert ignore into journalissuearticles values(Mn-GO-COOH); attached onto the glassy carbon insert ignore into journalissuearticles values(GC); electrode to develop a new method for the simultaneous determination of Cd 2+ and Pb 2+ ions in rice samples. Graphene oxide insert ignore into journalissuearticles values(GO); was attached on 4-aminophenyl covalently modified glassy carbon surface via amide reaction. As-prepared modified material was characterized with XPS, SEM and electrochemical methods. A novel differential pulse anodic stripping voltammetric insert ignore into journalissuearticles values(DPASV); method was developed for the simultaneous determination of Cd 2+ and Pb 2+ on the GC/Mn-GO-COOH nanoplatform electrode. A linear response was found for the heavy metals in the range from 5 to 100 m g/L. The limit of detections insert ignore into journalissuearticles values(LODs); of Cd 2+ and Pb 2+ were 0.04 m g/L and 0.08 m g/L respectively. Manganese dioxide decorated carboxylated graphene oxide electrode was applied to the detection of Cd 2+ and Pb 2+ present in different rice samples by developed voltammetric method, and the accessed results were found to be in accordance with that of ICP-OES.
Keywords : Heavy metals, food analysis, differential pulse anodic stripping voltammetry