Evaluation of a reduced graphene oxide-Sb nanoparticles electrochemical sensor for the detection of cadmium and lead in chamomile tea

• Autor(a) principal: Nunes, Erik W. [UNESP]
• Data de Publicação: 2020
• Outros Autores: Silva, Martin K.L. [UNESP], Cesarino, Ivana [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.3390/CHEMOSENSORS8030053; http://hdl.handle.net/11449/199236
• topic: Antimony nanoparticles; Electroanalysis; Graphene; Heavy metals; Tea

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 μmol L-1, with limits of detection (LOD) of 70.03 and 45.50 nmol L-1 for Cd2+ 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.