Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode

Ultra-trace levels of Hg2+ have been quantified by undertaking linear sweep voltammetry with silver nanoparticle-modified glassy carbon electrode (AgNP-GCE) in aqueous solutions containing Hg2+. This is achieved by monitoring the change in the silver stripping peak with Hg2+ concentration resulting...

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Asıl Yazarlar: Suherman, A, Ngamchuea, K, Tanner, E, Sokolov, S, Holter, J, Young, N, Compton, R
Materyal Türü: Journal article
Dil:English
Baskı/Yayın Bilgisi: American Chemical Society 2017
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author Suherman, A
Ngamchuea, K
Tanner, E
Sokolov, S
Holter, J
Young, N
Compton, R
author_facet Suherman, A
Ngamchuea, K
Tanner, E
Sokolov, S
Holter, J
Young, N
Compton, R
author_sort Suherman, A
collection OXFORD
description Ultra-trace levels of Hg2+ have been quantified by undertaking linear sweep voltammetry with silver nanoparticle-modified glassy carbon electrode (AgNP-GCE) in aqueous solutions containing Hg2+. This is achieved by monitoring the change in the silver stripping peak with Hg2+ concentration resulting from the galvanic displacement of silver by mercury: Ag(np) + ½ Hg2+ (aq) → Ag+ (aq) + ½ Hg(l). This facile and reproducible detection method exhibits an excellent linear dynamic range of 100.0 pM-10.0 nM Hg2+ concentration with R2 = 0.982. The limit of detection (LoD) based on 3σ is 28 pM Hg2+, whilst the lowest detectable level for quantification purposes is 100.0 pM. This method is appropriate for routine environmental monitoring and drinking water quality assessment since the guideline value set by the US Environmental Protection Agency (EPA) for inorganic mercury in drinking water is 0.002 mg L-1 (10 nM).
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spelling oxford-uuid:fce5dadd-752c-4ed2-8562-37f415a1f6b32022-03-27T13:24:40ZElectrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrodeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fce5dadd-752c-4ed2-8562-37f415a1f6b3EnglishSymplectic Elements at OxfordAmerican Chemical Society2017Suherman, ANgamchuea, KTanner, ESokolov, SHolter, JYoung, NCompton, RUltra-trace levels of Hg2+ have been quantified by undertaking linear sweep voltammetry with silver nanoparticle-modified glassy carbon electrode (AgNP-GCE) in aqueous solutions containing Hg2+. This is achieved by monitoring the change in the silver stripping peak with Hg2+ concentration resulting from the galvanic displacement of silver by mercury: Ag(np) + ½ Hg2+ (aq) → Ag+ (aq) + ½ Hg(l). This facile and reproducible detection method exhibits an excellent linear dynamic range of 100.0 pM-10.0 nM Hg2+ concentration with R2 = 0.982. The limit of detection (LoD) based on 3σ is 28 pM Hg2+, whilst the lowest detectable level for quantification purposes is 100.0 pM. This method is appropriate for routine environmental monitoring and drinking water quality assessment since the guideline value set by the US Environmental Protection Agency (EPA) for inorganic mercury in drinking water is 0.002 mg L-1 (10 nM).
spellingShingle Suherman, A
Ngamchuea, K
Tanner, E
Sokolov, S
Holter, J
Young, N
Compton, R
Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode
title Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode
title_full Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode
title_fullStr Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode
title_full_unstemmed Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode
title_short Electrochemical detection of ultra-trace (pico-molar) levels of Hg(2+) using a silver nanoparticle-modified glassy carbon electrode
title_sort electrochemical detection of ultra trace pico molar levels of hg 2 using a silver nanoparticle modified glassy carbon electrode
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