%0 Journal Article
%T Amperometric Sensor Used for Determination of Thiocyanate with a Silver Nanoparticles Modified Electrode
%A Guang-Feng Wang
%A Mao-Guo Li
%A Ying-Chun Gao
%A Bin Fang
%J Sensors
%D 2004
%I MDPI AG
%R 10.3390/s40900147
%X 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 5.0กม10-7~4.0กม10-4 mol/L in pH 6.0 NaH2PO4-Na2HPO4 buffer solutions (PBS). The detection limit (S/N=3) is 4กม10-8 mol/L. This method has been applied to the determination of saliva (smoker and non-smoker).
%K Silver nanoparticles
%K modified electrode
%K thiocyanate determination
%U http://www.mdpi.com/1424-8220/4/9/147