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Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode
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
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
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Cite This Article
MDPI and ACS Style
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.
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(9):147-155.
Wang, Guang-Feng; Li, Mao-Guo; Gao, Ying-Chun; Fang, Bin. 2004. "Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode." Sensors 4, no. 9: 147-155.