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Electrochemical Sensor Based on Fe Doped Hydroxyapatite-Carbon Nanotubes Composite for L-Dopa Detection in the Presence of Uric Acid
被引:12
|作者:
Kanchana, P.
[1
]
Radhakrishnan, S.
[1
]
Navaneethan, M.
[2
]
Arivanandhan, M.
[2
]
Hayakawa, Y.
[2
]
Sekar, C.
[1
]
机构:
[1] Alagappa Univ, Dept Bioelect & Biosensors, Karaikkudi 630003, Tamil Nadu, India
[2] Shizuoka Univ, Res Inst Elect, Hamamatsu, Shizuoka 4328011, Japan
关键词:
Fe Doped Hydroxyapatite;
CNTs;
Composites;
Electrochemical Sensor;
L-Dopa;
MODIFIED ELECTRODE;
DRUG;
NANOPARTICLES;
IMMUNOSENSOR;
CARBIDOPA;
LEVODOPA;
FILM;
D O I:
10.1166/jnn.2016.11645
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
A novel amperometric sensor based on iron doped hydroxyapatite (Fe-HA) and multiwalled carbon nanotubes (CNT) composite immobilized on a glassy carbon electrode (GCE) has been fabricated. The hybrid composite made of Fe-HA nanoparticles and CNT promotes electron transfer kinetics between the analyte levodopa (L-dopa) and the modified GC electrode. Under optimum conditions, the fabricated sensor gave a linear response range of 1.0x10(-7)-1.1x10(-6) M with the detection limit as low as 62 nM. The Fe-HA/CNT modified electrode showed good selectivity towards the determination of L-dopa in the presence of ascorbic acid (AA), uric acid (UA) and other common interferents. The sensor displays a high sensitivity, good reproducibility and long-term stability and it was successfully applied for the detection of L-dopa in pharmaceutical and medicinal plant samples.
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页码:6185 / 6192
页数:8
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