Evaluation of a Reduced Graphene Oxide-Sb Nanoparticles Electrochemical Sensor for the Detection of Cadmium and Lead in Chamomile Tea

Author(s)

Nunes, Erik W. ; Silva, Martin K. L. ; Cesarino, Ivana

• Document type: Journal article
• Source: CHEMOSENSORS; v. 8, n. 3, p. 12-pg., 2020-09-01.

Abstract

The development of electroanalytical sensors for heavy metals detection in complex matrices holds great interest. Herein, a sensor based on a reduced graphene oxide (rGO) modified with antimony nanoparticles (Sb) was developed for the electrochemical detection of divalent cadmium ions (Cd2+) and lead ions (Pb2+). The simultaneous determination of both metals covered a range of 0.1 to 3.0 mu mol L-1, with limits of detection (LOD) of 70.03 and 45.50 nmol L(-1)for Cd(2+)and Pb2+, respectively. For the individual detection, LOD of 20.50 nmol L-1(Cd2+) and 2.01 nmol L-1(Pb2+) were found. The analytical performance of this new sensor in detecting both metals in chamomile tea samples was satisfactorily evaluated. (AU)

• FAPESP's process: 18/09053-3 - Evaluation of the electrochemical sensor based on reduced graphene oxide and antimony nanoparticles for the determination of lead and cadmium in tea samples
• Grantee: Erik Weber Nunes
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 17/24274-3 - Development of glucose biosensor as an analytical tool aiming the optimization of second-generation ethanol production from pineapple residues
• Grantee: Ivana Cesarino
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants