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Sensors 2004, 4(9), 147-155; doi:10.3390/s40900147
Article

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

, ,  and *
Schools of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
* Author to whom correspondence should be addressed.
Received: 15 March 2004 / Accepted: 28 August 2004 / Published: 1 October 2004
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Abstract

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).
Keywords: Silver nanoparticles; modified electrode; thiocyanate determination Silver nanoparticles; modified electrode; thiocyanate determination
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Wang, G.-F.; Li, M.-G.; Gao, Y.-C.; Fang, B. Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode. Sensors 2004, 4, 147-155.

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