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Determination of heavy metals at the electrochemically reduced graphene oxide mercury film electrode (ERGO-HgF-PGE) using adsorptive stripping voltammetry

>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

Identiferoai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uwc/oai:etd.uwc.ac.za:11394/7718
Date January 2020
CreatorsSanga, Nelia Abraham
ContributorsJahed, Nazeem, Iwuoha, Emmanuel. I., Pokpas, Keagan
PublisherUniversity of Western Cape
Source SetsSouth African National ETD Portal
LanguageEnglish
Detected LanguageEnglish
RightsUniversity of Western Cape

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