New electrode material GCE/AgNPs-D3 as an electrochemical sensor used for the detection of thallium ions |
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| Authors: | Anna Modrzejewska-Sikorska Emilia Konował Bożena Karbowska Dominika Szatkowska |
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| Affiliation: | Poznan University of Technology, Faculty of Chemical Technology, Institute of Chemistry and Technical Electrochemistry, Berdychowo 4, 60-965 Poznan, Poland |
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| Abstract: | Optimal working parameters for the innovative electrode GCE/AgNPs-D3 were determined and the selectivity was assessed. The stripping anodic peak current of thallium characterized in linearity over range from 4.9 ⋅ 10−8 to 4.9 ⋅ 10−7 mol ⋅ dm−3, with LOD = 7.16 ppb (3.5 ⋅ 10−8 mol ⋅ dm−3). Furthermore, the new electrode showed more than sevenfold improvement in the thallium current signal compared to the unmodified electrode GCE. High selectivity was achieved using EDTA disodium salt as a complexing agent for other metals. |
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| Keywords: | biopolymers differential-pulse anodic stripping voltammetry electrode modification silver nanoparticles starch derivatives thallium |
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