Few-layer binder free graphene modified mercury film electrode for trace metal analysis by square wave anodic stripping voltammetry

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dc.contributor.advisor
dc.contributor.authorZbeda, Salma
dc.contributor.authorPokpas, Keagan
dc.contributor.authorTitinchi, Salam J.J.
dc.contributor.authorJahed, Nazeem
dc.contributor.authorBaker, Priscilla
dc.contributor.authorIwuoha, Emmanuel I.
dc.date.accessioned2017-06-13T02:24:24Z
dc.date.available2017-06-13T02:24:24Z
dc.date.issued2013
dc.description.abstractA binding agent free graphene modified glassy carbon electrode in combination with an in situ plated mercury film electrode (Gr-GC-HgFE) was used as a highly sensitive electrochemical platform for the determination of Zn2+, Cd2+ and Pb2+ in 0.1 M acetate buffer (pH 4.6) by square-wave anodic stripping voltammetry (SWASV). Instrumental parameters such as deposition potential, deposition time and electrode rotation speed were optimized. The Gr-GC-HgFE sensing platform exhibited improved sensitivity for metal ion detection, in addition to well defined, reproducible and sharp stripping signals. Two linear calibration curves ranging from 0 –10 μg L−1 and 0 – 60 μg L−1 were identified yielding detection limits of 0.08 μg L−1, 0.05 μg L−1 and 0.14 μg L−1 for Zn2+, Cd2+ and Pb2+, respectively, for simultaneous analysis and 0.04 μg L−1, 0.11 μg L−1 and 0.14 μg L−1 for Zn2+, Cd2+ and Pb2+, respectively, for individual analysis when using a deposition time of 120 s. For practical applications recovery studies using tap water samples spiked with target metal ions gave recoveries within 10% of the spiked amount. Much better recoveries were obtained for the individual analysis in comparison with simultaneous analysis.en_US
dc.description.accreditationWeb of Science
dc.identifier.citationZbeda, S. et al. (2013). Few-layer binder free graphene modified mercury film electrode for trace metal analysis by square wave anodic stripping voltammetry. International Journal of Electrochemical Science, 8: 11125-11141en_US
dc.identifier.issn1452-3981
dc.identifier.urihttp://hdl.handle.net/10566/2974
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherESGen_US
dc.rightsnternational Journal of Electrochemical Science is an international peer-reviewed and open access journal that publishes original research articles, short communications as well as review articles in the field of electrochemistry.
dc.status.ispeerreviewedTRUE
dc.subjectGrapheneen_US
dc.subjectModified mercury filmen_US
dc.subjectSquare wave anodic stripping voltammetryen_US
dc.subjectHeavy metalsen_US
dc.titleFew-layer binder free graphene modified mercury film electrode for trace metal analysis by square wave anodic stripping voltammetryen_US
dc.typeArticleen_US

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