Fast batch injection analysis of H2O2 using an array of Pt-modified gold microelectrodes obtained from split electronic chips

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dc.contributor.authorPacheco B.D.
dc.contributor.authorValerio J.
dc.contributor.authorAngnes L.
dc.contributor.authorPedrotti J.J.
dc.date.accessioned2024-03-13T01:11:04Z
dc.date.available2024-03-13T01:11:04Z
dc.date.issued2011
dc.description.abstractA fast and robust analytical method for amperometric determination of hydrogen peroxide (H2O2) based on batch injection analysis (BIA) on an array of gold microelectrodes modified with platinum is proposed. The gold microelectrode array (n=14) was obtained from electronic chips developed for surface mounted device technology (SMD), whose size offers advantages to adapt them in batch cells. The effect of the dispensing rate, volume injected, distance between the platinum microelectrodes and the pipette tip, as well as the volume of solution in the cell on the analytical response were evaluated. The method allows the H2O2 amperometric determination in the concentration range from 0.8μmolL-1 to 100μmolL-1. The analytical frequency can attain 300 determinations per hour and the detection limit was estimated in 0.34μmolL-1 (3σ). The anodic current peaks obtained after a series of 23 successive injections of 50μL of 25μmolL-1 H2O2 showed an RSD<0.9%. To ensure the good selectivity to detect H2O2, its determination was performed in a differential mode, with selective destruction of the H2O2 with catalase in 10mmolL-1 phosphate buffer solution. Practical application of the analytical procedure involved H2O2 determination in rainwater of São Paulo City. A comparison of the results obtained by the proposed amperometric method with another one which combines flow injection analysis (FIA) with spectrophotometric detection showed good agreement. © 2011 Elsevier B.V.
dc.description.firstpage53
dc.description.issuenumber1-2
dc.description.lastpage58
dc.description.volume696
dc.identifier.doi10.1016/j.aca.2011.04.004
dc.identifier.issn1873-4324
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36976
dc.relation.ispartofAnalytica Chimica Acta
dc.rightsAcesso Restrito
dc.subject.otherlanguageAmperometry
dc.subject.otherlanguageBatch injection analysis
dc.subject.otherlanguageGold microelectrode arrays
dc.subject.otherlanguageHydrogen peroxide
dc.subject.otherlanguageRainwater
dc.titleFast batch injection analysis of H2O2 using an array of Pt-modified gold microelectrodes obtained from split electronic chips
dc.typeArtigo
local.scopus.citations16
local.scopus.eid2-s2.0-79957460408
local.scopus.subjectAmperometric determination
local.scopus.subjectAmperometry
local.scopus.subjectBatch-injection analysis
local.scopus.subjectGold microelectrodes
local.scopus.subjectPhosphate buffer solutions
local.scopus.subjectRainwater
local.scopus.subjectRobust analytical methods
local.scopus.subjectSpectrophotometric detection
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79957460408&origin=inward
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