Amperometric sensor used for determination of thiocyanate with a silver nanoparticles modified electrode

被引：44
作者：
Wang, GF
Li, MG
Gao, YC
Fang, B [1 ]
机构：
[1] Anhui Normal Univ, Sch Chem, Wuhu 241000, Peoples R China
[2] Anhui Normal Univ, Sch Mat Sci, Wuhu 241000, Peoples R China
来源：
SENSORS | 2004年 / 4卷 / 09期
关键词：
silver nanoparticles; modified electrode; thiocyanate determination;
D O I：
10.3390/s40900147
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
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 x 10(-7) similar to4.0 x 10(-4) mol/L in pH 6.0 NaH2PO4-Na2HPO4 buffer solutions (PBS). The detection limit (S/N=3) is 4 x 10(-8) mol/L. This method has been applied to the determination of saliva (smoker and non-smoker).
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页码：147 / 155
页数：9
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