Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV

With the ever-increasing influence of heavy metal ions in environmental pollution, it is highly desirable to develop facile, rapid, and low-cost methods for the multiplexed detection of heavy metal ions in aqueous media sensitively and quantitatively. In this study, we report a facile electrochemica...

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Autores principales:	Dongmin Shi, Wenzhan Wu, Xiaoyuan Li
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Multiplexed detection Heavy metal ions Mercury\|graphene film modified electrode Differential pulse anodic stripping voltammetry Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/5450f50811cd45efb3208a5d8414288d
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spelling	oai:doaj.org-article:5450f50811cd45efb3208a5d8414288d2021-11-26T04:29:28ZMultiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV2214-180410.1016/j.sbsr.2021.100464https://doaj.org/article/5450f50811cd45efb3208a5d8414288d2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214180421000696https://doaj.org/toc/2214-1804With the ever-increasing influence of heavy metal ions in environmental pollution, it is highly desirable to develop facile, rapid, and low-cost methods for the multiplexed detection of heavy metal ions in aqueous media sensitively and quantitatively. In this study, we report a facile electrochemical method for the selective, quantitative and multiplexed detection of cadmium (Cd2+), lead (Pb2+), and copper (Cu2+) ions in aqueous media. In this method, a glassy carbon electrode (GCE) is modified first with reduced graphene oxide(rGO) microflaks followed by the controlled in situ electro-deposition of a very thin mercury film. The final working electrode, denoted as (Hg\|rGO)film\|GCE, was employed as the detector for reported multiplexed detection of multi-ions, taking advantages of the well-established polaragraphic principles. The rGO layer was known to be capable of significantly increasing the heterogeneous interface electron-transfer rate and therefore the detection sensitivity, while the highly dispersed over-potentials of heavy metal ions on mercury allowed the multiplexed detection of several heavy metals ions at different working potentials. The differential pulse anodic stripping voltammetry (DPASV) was employed as the detection mode to further boost up the detection sensitivity. Very good quantitative relationships were observed between the peak current in DPASV and the concentration of the ions being detected. The cross-interference in the multiplexed detection was found negligible. The limit of detections (LODs) of Cd2+, Pb2+, and Cu2+ ions in aqueous phase at the (Hg/rGO)film/GCE working electrode were found to be 0.17, 0.18 and 0.69 μg/L, respectively.Dongmin ShiWenzhan WuXiaoyuan LiElsevierarticleMultiplexed detectionHeavy metal ionsMercury\|graphene film modified electrodeDifferential pulse anodic stripping voltammetryEngineering (General). Civil engineering (General)TA1-2040ENSensing and Bio-Sensing Research, Vol 34, Iss , Pp 100464- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Multiplexed detection Heavy metal ions Mercury\|graphene film modified electrode Differential pulse anodic stripping voltammetry Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Multiplexed detection Heavy metal ions Mercury\|graphene film modified electrode Differential pulse anodic stripping voltammetry Engineering (General). Civil engineering (General) TA1-2040 Dongmin Shi Wenzhan Wu Xiaoyuan Li Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV
description	With the ever-increasing influence of heavy metal ions in environmental pollution, it is highly desirable to develop facile, rapid, and low-cost methods for the multiplexed detection of heavy metal ions in aqueous media sensitively and quantitatively. In this study, we report a facile electrochemical method for the selective, quantitative and multiplexed detection of cadmium (Cd2+), lead (Pb2+), and copper (Cu2+) ions in aqueous media. In this method, a glassy carbon electrode (GCE) is modified first with reduced graphene oxide(rGO) microflaks followed by the controlled in situ electro-deposition of a very thin mercury film. The final working electrode, denoted as (Hg\|rGO)film\|GCE, was employed as the detector for reported multiplexed detection of multi-ions, taking advantages of the well-established polaragraphic principles. The rGO layer was known to be capable of significantly increasing the heterogeneous interface electron-transfer rate and therefore the detection sensitivity, while the highly dispersed over-potentials of heavy metal ions on mercury allowed the multiplexed detection of several heavy metals ions at different working potentials. The differential pulse anodic stripping voltammetry (DPASV) was employed as the detection mode to further boost up the detection sensitivity. Very good quantitative relationships were observed between the peak current in DPASV and the concentration of the ions being detected. The cross-interference in the multiplexed detection was found negligible. The limit of detections (LODs) of Cd2+, Pb2+, and Cu2+ ions in aqueous phase at the (Hg/rGO)film/GCE working electrode were found to be 0.17, 0.18 and 0.69 μg/L, respectively.
format	article
author	Dongmin Shi Wenzhan Wu Xiaoyuan Li
author_facet	Dongmin Shi Wenzhan Wu Xiaoyuan Li
author_sort	Dongmin Shi
title	Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV
title_short	Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV
title_full	Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV
title_fullStr	Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV
title_full_unstemmed	Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV
title_sort	multiplexed detection of aqueous cd2+, pb2+ and cu2+ ions at mercury-on-graphene film modified electrode by dpasv
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/5450f50811cd45efb3208a5d8414288d
work_keys_str_mv	AT dongminshi multiplexeddetectionofaqueouscd2pb2andcu2ionsatmercuryongraphenefilmmodifiedelectrodebydpasv AT wenzhanwu multiplexeddetectionofaqueouscd2pb2andcu2ionsatmercuryongraphenefilmmodifiedelectrodebydpasv AT xiaoyuanli multiplexeddetectionofaqueouscd2pb2andcu2ionsatmercuryongraphenefilmmodifiedelectrodebydpasv
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Multiplexed detection of aqueous Cd2+, Pb2+ and Cu2+ ions at mercury-on-graphene film modified electrode by DPASV

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