>Magister Scientiae - MSc / This work reports the use of a pencil graphite electrode (PGE) as inexpensive and sensitive
electrochemical sensing platform fabricated by using electrochemically reduced graphene oxide
(ERGO) in conjunction with an in-situ plated thin mercury film. For the first time the ERGOHgF-PGE sensor is proposed for simultaneous detection of cadmium (Cd2+), copper (Cu2+), lead
(Pb2+) and zinc (Zn2+) using N-Nitroso-N-phenylhydroxylamine (cupferron) as complexing agent
by square-wave adsorptive cathodic stripping voltammetry (SW-AdCSV). The technique is
based on the adsorption of cupferron- metal ion complexes onto the surface of the ERGO-HgFPGE at 0.1 V for 60 s carried out in 0.1 M acetate buffer solution (pH 4.6). The synthesized
graphene oxide (GO) and graphene nanosheets (GNs) were characterized using different
analytical techniques such as FT-IR which confirms the presence of oxygen moieties embedded
in the graphitic structure and further demonstrated by UV-Vis, validating the synthesis of GO / 2023
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uwc/oai:etd.uwc.ac.za:11394/7718 |
| Date | January 2020 |
| Creators | Sanga, Nelia Abraham |
| Contributors | Jahed, Nazeem, Iwuoha, Emmanuel. I., Pokpas, Keagan |
| Publisher | University of Western Cape |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Rights | University of Western Cape |
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