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Development and application of a routine robust graphite/poly(lactic acid) composite electrode for the fast simultaneous determination of Pb2+ and Cd2+ in bijou by square wave anodic stripping voltammetry

Abstract

A handcrafted, low cost sustainable electrochemical sensor based on graphite/PLA was developed and proposed for the simultaneous quantification of Pb2+ and Cd2+ in bijou (metallic ores) on the basis of square-wave anodic stripping voltammetry (SWASV). The proposed electrode was characterized by different complementary strategies such as cyclic voltammetry (CV), thermogravimetric analysis (TGA), Raman spectroscopy, X-ray Micro Computed Tomography (µCT), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Experimental results show that the developed electrode exhibited excellent electrochemical performance, with accurate and well-resolved voltammetric responses for the analytes assessed. Under optimized conditions, experiments leaded to linear ranges from 0.9 to 35.0 µg L–1 for Cd2+, and from 1.2 to 35.0 µg L–1 for Pb2+, with detection limits estimated in 0.3 µg L–1 and 0.4 µg L–1, respectively. The fabricated electrode was successfully applied to the fast simultaneous quantification of Pb2+ and Cd2+ in bijou samples, being the findings in agreement to those reached by graphite furnace atomic absorption spectrometry (GF AAS).

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Publication details

The article was received on 13 Jul 2018, accepted on 01 Oct 2018 and first published on 01 Oct 2018


Article type: Paper
DOI: 10.1039/C8NJ03501F
Citation: New J. Chem., 2018, Accepted Manuscript
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    Development and application of a routine robust graphite/poly(lactic acid) composite electrode for the fast simultaneous determination of Pb2+ and Cd2+ in bijou by square wave anodic stripping voltammetry

    A. L. Silva, M. M. Correa, G. C. de Oliveira, R. C. MIchel, F. S. Semaan and E. A. Ponzio, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ03501F

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