Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/14722
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dc.contributor.authorApilux A.
dc.contributor.authorDungchai W.
dc.contributor.authorSiangproh W.
dc.contributor.authorPraphairaksit N.
dc.contributor.authorHenry C.S.
dc.contributor.authorChailapakul O.
dc.date.accessioned2021-04-05T03:36:46Z-
dc.date.available2021-04-05T03:36:46Z-
dc.date.issued2010
dc.identifier.issn32700
dc.identifier.other2-s2.0-77749302316
dc.identifier.urihttps://ir.swu.ac.th/jspui/handle/123456789/14722-
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-77749302316&doi=10.1021%2fac9022555&partnerID=40&md5=963317afb202846b80edc680121baf5d
dc.description.abstractA novel lab-on-paper device combining electrochemical and colorimetric detection for the rapid screening of Au(III) in the presence of a common interference, Fe(III), in industrial waste solutions is presented here. With dilute aqua regia (0.1 M HCl + 0.05 M HNO3) as the supporting electrolyte, square wave voltammetry on paper provided a well-defined reduction peak for Au(III) at ∼287 ± 12 mV vs Ag/AgCl. Under the optimized working conditions, the calibration curve showed good linearity in the concentration range of 1-200 ppm of Au(III) with a correlation coefficient of 0.997. The limit of detection (LOD) of the proposed method is 1 ppm. Interferences from various cations were also studied. Fe(III) is the only metal that affects the electrochemical determination of Au(III) when present above a 2.5-fold excess concentration of that of the Au(III). To overcome this limitation, a colorimetric method was used to simultaneously detect Fe(III) as a screening tool. The procedure was then successfully applied to determine Au(III) in gold-refining waste solutions. The results are in agreement with those obtained from inductively coupled plasma-atomic emission spectrometry (ICP-AES). © 2010 American Chemical Society.
dc.subjectAg/AgCl
dc.subjectAqua regia
dc.subjectCalibration curves
dc.subjectColorimetric detection
dc.subjectColorimetric methods
dc.subjectConcentration of
dc.subjectConcentration ranges
dc.subjectCorrelation coefficient
dc.subjectElectrochemical determination
dc.subjectInductively coupled plasma-atomic emission spectrometry
dc.subjectLimit of detection
dc.subjectRapid screening
dc.subjectReduction peak
dc.subjectScreening tool
dc.subjectSimultaneous determinations
dc.subjectSquare wave voltammetry
dc.subjectSupporting electrolyte
dc.subjectWaste solution
dc.subjectWorking conditions
dc.subjectAtomic emission spectroscopy
dc.subjectColor
dc.subjectColorimetry
dc.subjectCurve fitting
dc.subjectGold compounds
dc.subjectInductively coupled plasma
dc.subjectIron compounds
dc.subjectMetal refining
dc.subjectChemical detection
dc.subjectgold
dc.subjectiron
dc.subjectarticle
dc.subjectcolorimetry
dc.subjectelectrochemistry
dc.subjectmethodology
dc.subjectstatistical parameters
dc.subjectColorimetry
dc.subjectElectrochemistry
dc.subjectGold
dc.subjectIron
dc.subjectLimit of Detection
dc.titleLab-on-paper with dual electrochemical/ colorimetric detection for simultaneous determination of gold and iron
dc.typeArticle
dc.rights.holderScopus
dc.identifier.bibliograpycitationAnalytical Chemistry. Vol 82, No.5 (2010), p.1727-1732
dc.identifier.doi10.1021/ac9022555
Appears in Collections:Scopus 1983-2021

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