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dc.contributor.authorPungjunun K.
dc.contributor.authorNantaphol S.
dc.contributor.authorPraphairaksit N.
dc.contributor.authorSiangproh W.
dc.contributor.authorChaiyo S.
dc.contributor.authorChailapakul O.
dc.description.abstractDue to similar properties in the electroanalysis of tin (Sn(II)) and lead (Pb(II)), the voltammograms of tin and lead overlap and it is difficult to simultaneously determine these two metals. Herein, we develop a simple fabricated sensor based on a bismuth nanoparticle-modified screen-printed graphene electrode (BiNP/SPGE) on a paper-based analytical device (PAD) for the simultaneous determination of Sn(II) and Pb(II) and combine it with a portable potentiostat. To overcome crossing interference, the use of hexadecyltrimethylammonium bromide (CTAB) can provide improved separation and enhanced sensitivity for Sn(II) and Pb(II) detection in oxalic acid as a supporting electrolyte while using square-wave anodic stripping voltammetry. Under optimal conditions, the linear range of both metals was determined to be 10–250 ng mL−1, and the calculated limit of detection (3SD/slope) was 0.26 ng mL−1 and 0.44 ng mL−1 for Sn(II) and Pb(II), respectively. This sensor was also applied to simultaneously determine Sn(II) and Pb(II) in canned food samples. The results obtained from the portable potentiostat were similar to the results obtained by a standard method. Therefore, the proposed device can be further improved for the realization of a rapid on-site detector for Sn(II) and Pb(II) detection in real samples. © 2020 Elsevier B.V.
dc.subjectAnalytic equipment
dc.subjectGraphite electrodes
dc.subjectLead compounds
dc.subjectOxalic acid
dc.subjectVoltage regulators
dc.subjectBismuth nanoparticles
dc.subjectEnhanced sensitivity
dc.subjectHexadecyltrimethylammonium bromide
dc.subjectPaper-based analytical devices
dc.subjectScreen-printed graphene electrodes
dc.subjectSimultaneous determinations
dc.subjectSquare wave anodic stripping voltammetry
dc.subjectSupporting electrolyte
dc.subjectTin compounds
dc.titleEnhanced sensitivity and separation for simultaneous determination of tin and lead using paper-based sensors combined with a portable potentiostat
dc.identifier.bibliograpycitationSensors and Actuators, B: Chemical. Vol 318, (2020)
Appears in Collections:Scopus 1983-2021

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