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dc.contributor.authorWasiewska, Luiza Adela
dc.contributor.authorSeymour, Ian
dc.contributor.authorPatella, Bernardo
dc.contributor.authorBurgess, Catherine
dc.contributor.authorDuffy, Geraldine
dc.contributor.authorO'Riordan, Alan
dc.date.accessioned2024-02-18T13:32:20Z
dc.date.available2024-02-18T13:32:20Z
dc.date.issued2020-07-10
dc.identifier.citationLuiza A. Wasiewska, Ian Seymour, Bernardo Patella, Rosalinda Inguanta, Catherine M. Burgess, Geraldine Duffy, Alan O'Riordan, Reagent free electrochemical-based detection of silver ions at interdigitated microelectrodes using in-situ pH control, Sensors and Actuators B: Chemical, Volume 333, 2021, 129531, ISSN 0925-4005, https://doi.org/10.1016/j.snb.2021.129531.en_US
dc.identifier.urihttp://hdl.handle.net/11019/3599
dc.descriptionpeer-revieweden_US
dc.description.abstractHerein we report on the development of an electrochemical sensor for silver ions detection in tap water using anodic sweep voltammetry with in-situ pH control; enabled by closely spaced interdigitated electrode arrays. The in-situ pH control approach allowed the pH of a test solution to be tailored to pH 3 (experimentally determined as the optimal pH) by applying 1.65 V to a protonator electrode with the subsequent production of protons, arising from water electrolysis, dropping the local pH value. Using this approach, an initial proof-of-concept study for silver detection in sodium acetate was undertaken where 1.25 V was applied during deposition (to compensate for oxygen production) and 1.65 V during stripping. Using these conditions, calibration between 0.2 and 10 μM was established with the silver stripping peak ∼0.3 V. The calculated limit of detection was 13 nM. For the final application in tap water, 1.65 V was applied to a protonator electrode for both deposition and stripping of silver. The chloride ions, present in tap water (as a consequence of adding chlorine during the disinfection process) facilitated silver detection and caused the striping peak to shift catholically to ∼0.2 V. The combination of the complexation of silver ions with chloride and in-situ pH control resulted in a linear calibration range between 0.25 and 2 μM in tap water and a calculated limit of detection of 106 nM without the need to add acid or supporting electrolytes.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofseriesSensors and Actuators B: Chemical;Vol 333
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.subjectSilver ionsen_US
dc.subjectTap wateren_US
dc.subjectSquare wave voltammetryen_US
dc.subjectLocal pH controlen_US
dc.subjectInterdigitated gold microband electrodesen_US
dc.titleReagent Free Electrochemical-Based Detection of Silver Ions at Interdigitated Micro Electrodes Using in Situ pH Controlen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1016/j.snb.2021.129531
dc.contributor.sponsorTeagasc Walsh Scholarshipen_US
dc.contributor.sponsorScience Foundation Ireland (SFI)en_US
dc.contributor.sponsorDepartment of Agriculture, Food and Marineen_US
dc.contributor.sponsorGrantNumber2016024en_US
dc.contributor.sponsorGrantNumber16/RC/3835en_US
refterms.dateFOA2024-02-18T13:32:22Z


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