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Proceedings 2018, 2(13), 1518; https://doi.org/10.3390/proceedings2131518

Microfabricated Au-Film Sensors for the Voltammetric Determination of Hg(II)

Laboratory of Analytical Chemistry, Department of Chemistry, University of Athens, Athens 15771, Greece
Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.
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Published: 7 December 2018
PDF [330 KB, uploaded 7 December 2018]

Abstract

In this work, a microfabricated Au-film sensor was designed and fabricated for the
voltammmetric determination of Hg(II). The electrode was fabricated on a silicon chip with a
standard microengineering approach utilizing photolithography for patterning the electrode shape
and sputtering for deposition of thin Cr and Au films on the surface of the sensors. The sensors
were used for the determination of trace Hg(II) with anodic stripping voltammetry (ASV): initially
Hg(II) in the sample was accumulated on the Au working electrode surface by reduction and
formation of an Au(Hg) amalgam followed by oxidation of the preconcentrated metallic Hg using a
square wave voltammetric scan. The limit of detection was 1.5μgL−1 and the coefficient of variation
of 10 consecutive measurements was 3.1%.
Keywords: anodic stripping voltammetry; Hg(II); microfabrication; gold electrodes anodic stripping voltammetry; Hg(II); microfabrication; gold electrodes
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Tsetsoni, M.; Roditi, E.; Kokkinos, C.; Economou, A. Microfabricated Au-Film Sensors for the Voltammetric Determination of Hg(II). Proceedings 2018, 2, 1518.

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