化学
循环伏安法
咖啡酸
玻璃碳
介电谱
电极
检出限
电化学
核化学
化学修饰电极
伏安法
分析化学(期刊)
色谱法
工作电极
有机化学
物理化学
抗氧化剂
作者
Tianbao Li,Juan Xu,Lei Zhao,Shaofei Shen,Mao‐Sen Yuan,Wenming Liu,Qin Tu,Ruijin Yu,Jinyi Wang
出处
期刊:Talanta
[Elsevier]
日期:2016-10-01
卷期号:159: 356-364
被引量:39
标识
DOI:10.1016/j.talanta.2016.06.044
摘要
An Au nanoparticles/poly(caffeic acid) (AuNPs/PCA) composite modified glassy carbon (GC) electrode was prepared by successively potentiostatic technique in pH 7.4 phosphate buffer solution containing 0.02mM caffeic acid and 1.0mM HAuCl4. Electrochemical characterization of the AuNPs/PCA-GC electrode was investigated by electrochemical impedance spectroscopy and cyclic voltammetry. The electrochemical behavior of acetaminophen (AP) at the AuNPs/PCA-GC electrode was also studied by cyclic voltammetry. Compared with bare GC and poly(caffeic acid) modified GC electrode, the AuNPs/PCA-GC electrode was exhibited excellent electrocatalytic activity toward the oxidation of AP. The plot of catalytic current versus AP concentration showed two linear segments in the concentration ranges 0.2-20µM and 50-1000µM. The detection limit of 14 nM was obtained by using the first range of the calibration plot. The AuNPs/PCA-GC electrode has been successfully applied and validated by analyzing AP in blood, urine and pharmaceutical samples.
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