Electrochemical Detection of Melamine by Using Reduced Graphene Oxide-Copper Nanoflowers Modified Glassy Carbon Electrode

Mahbuba Daizy; Chaitaly Tarafder; Md Rashid Al-Mamun; Xiuhua Liu; Mohamed Aly Saad Aly; Md Zaved H Khan

doi:10.1021/acsomega.9b02827

Electrochemical Detection of Melamine by Using Reduced Graphene Oxide-Copper Nanoflowers Modified Glassy Carbon Electrode

ACS Omega. 2019 Nov 19;4(23):20324-20329. doi: 10.1021/acsomega.9b02827. eCollection 2019 Dec 3.

Authors

Mahbuba Daizy¹, Chaitaly Tarafder¹, Md Rashid Al-Mamun¹, Xiuhua Liu², Mohamed Aly Saad Aly³, Md Zaved H Khan¹

Affiliations

¹ Department of Chemical Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh.
² College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
³ Department of Electronics and Information Science, Miami College of Henan University, Kaifeng 475000, China.

Abstract

In this work, a robust and reliable electrochemical sensor was developed for sensitive detection of non-electroactive melamine (MEL) using a modified glassy carbon electrode with ascorbic acid (AA) as the active recognition element. To increase the current signal of AA, the working electrode was successively modified with l-arginine (l-Arg) and reduced graphene oxide-copper nanoflower composite. The voltammetry measurements denoted that the hydrogen bonding was formed between AA and MEL. Using the optimum conditions, the proposed enhanced sensor can detect MEL concentrations ranging from 10 × 10^-9 to 9.0 × 10^-8 M with a detection limit of 5.0 × 10^-9 M that is proportional to the decrease of AA in the anodic peak current. Finally, the proposed sensor was successfully applied for the determination of MEL in commercial infant milk samples and good recovery values were obtained.