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Gold Nanoparticle Modified Screen Printed Electrodes for the Trace Sensing of Arsenic(III) in the Presence of Copper(II)
Author(s) -
Khairy Mohamed,
Kampouris Dimitrios K.,
Kadara Rashid O.,
Banks Craig E.
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000226
Subject(s) - arsenic , colloidal gold , anodic stripping voltammetry , copper , detection limit , stripping (fiber) , aqueous solution , chemistry , voltammetry , electrode , trace amounts , nanoparticle , inorganic chemistry , analytical chemistry (journal) , materials science , electrochemistry , nanotechnology , chromatography , organic chemistry , composite material , medicine , alternative medicine , pathology
Abstract Gold ensembles for the trace level sensing of arsenic(III) in the presence of copper(II) are reported. The gold ensembles are fabricated using citrate capped gold nanoparticles which are chemically synthesised in an aqueous solution with an aliquot of this simply cast onto an economical and disposable screen printed electrode. After drying at room temperature, the gold ensembles are ready for use. The gold ensembles are explored towards the sensing of arsenic(III) in the presence of copper(II) using anodic stripping voltammetry where the corresponding stripping peaks are well resolved and using this protocol it is possible to readily detect 3 µg L −1 (3 ppb) with a detection limit of 0.4 µg L −1 (0.4 ppb). Proof‐of‐concept is also shown for the sensing of arsenic(III) in a canal water sample. Given the low cost of the sensor and ease of fabrication, the gold ensembles hold promise for the sensing of arsenic(III) in water samples where copper(II) may be present.