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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 occurre...
| Autores principales: | , , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Molecular Diversity Preservation International (MDPI)
2004
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4008873/ http://dx.doi.org/10.3390/s040900147 |
| Sumario: | 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 NaH(2)PO(4)-Na(2)HPO(4) 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). |
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