Highly Sensitive Electrochemical Determination of Dopamine with an Overoxidized Polypyrrole Nanofiber Pencil Graphite Electrode

被引：29
作者：
Koyun, Ozge [1 ]
Gursu, Hurmus [1 ,2 ]
Gorduk, Semih [1 ]
Sahin, Yucel [1 ]
机构：
[1] Yildiz Tech Univ, Fac Arts & Sci, Dept Chem, TR-34210 Istanbul, Turkey
[2] HMY Chem & Energy Ltd Co, TR-34220 Istanbul, Turkey
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2017年 / 12卷 / 07期
关键词：
Dopamine; Polypyrrole; Electropolymerization; Pencil Graphite Electrode; Sensor; GLASSY-CARBON ELECTRODE; ASCORBIC-ACID; URIC-ACID; GRAPHENE OXIDE; SELECTIVE DETERMINATION; PASTE ELECTRODE; GOLD ELECTRODE; SERUM SAMPLES; NANOTUBES; SENSOR;
D O I：
10.20964/2017.07.41
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We investigated the use of an overoxidized nanofiber polypyrrole (OONfPPy) modified pencil graphite electrode (PGE) as a sensor for the determination of dopamine (DA) in this work. The performance of the modified electrode was studied using differential pulse voltammetric method. The surface of the modified electrode was characterized by an electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). The calculated electroactive areas of the bare electrode and OO(10)NfPPy(5)PGE were found to be 4.54 x 10(-8) cm(2) and 1.05 x 10(-6) cm(2), respectively. The sensor (OO(10)NfPPy(5)PGE) showed a high selectivity to DA with a detection limit of 6.95 x 10(-9) M (S/N= 3). To demonstrate the validity of the sensor for the determination of DA, pharmaceutical and human serum samples were performed.
引用
收藏
页码：6428 / 6444
页数：17
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