Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode

A novel electrode modified with silver nanoparticles was fabricated. It is found that the reducibility of silver nanoparticles is higher than for bulk silver by comparing a silver nanoparticles modified electrode with a silver micro-disk electrode. When SCN- was added, a new oxidation peak occurred...

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Published in:Sensors (Basel, Switzerland) Switzerland), 2004-10, Vol.4 (9), p.147-155
Main Authors: Wang, Guang-Feng, Li, Mao-Guo, Gao, Ying-Chun, Fang, Bin
Format: Article
Language:English
Subjects:
Electrodes
Electrons
Investigations
modified electrode
Nanoparticles
Oxidation
Reagents
Sensors
Silver
Silver nanoparticles
thiocyanate determination
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cited_by cdi_FETCH-LOGICAL-c358t-6a9be7ce9a9061dde1400f43888743fc4d7e1ff23a7f4e638804c1a640de60ec3
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creator Wang, Guang-Feng
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description A novel electrode modified with silver nanoparticles was fabricated. It is found that the reducibility of silver nanoparticles is higher than for bulk silver by comparing a silver nanoparticles modified electrode with a silver micro-disk electrode. When SCN- was added, a new oxidation peak occurred and the anodic peak current of silver nanoparticles decreased. The new anodic peak current is proportional to the thiocyanate concentration in the range of 5.0×10-7~4.0×10-4 mol/L in pH 6.0 NaH2PO4-Na2HPO4 buffer solutions (PBS). The detection limit (S/N=3) is 4×10-8 mol/L. This method has been applied to the determination of saliva (smoker and non-smoker).
doi_str_mv 10.3390/s40900147
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subjects Electrodes
Electrons
Investigations
modified electrode
Nanoparticles
Oxidation
Reagents
Sensors
Silver
Silver nanoparticles
thiocyanate determination
title Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode
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