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

Sensors

Guang-Feng Wang¹  Mao-Guo Li¹  Ying-Chun Gao¹ 

[1] id="af1-sensors-04-00147">Schools of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China, Fax: [phone], Tel: [phone]

关键词: Silver nanoparticles;    modified electrode;    thiocyanate determination;   

DOI  :  10.3390/s40900147

来源: mdpi

【 摘 要 】

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).

【 授权许可】

Unknown   
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