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β ‐Cyclodextrin Incorporated Carbon Nanotube Paste Electrode as Electrochemical Sensor for Nifedipine
Author(s) -
Kor Kamalodin,
Zarei Kobra
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200652
Subject(s) - carbon paste electrode , electrode , cyclic voltammetry , electrochemical gas sensor , dielectric spectroscopy , carbon nanotube , differential pulse voltammetry , materials science , electrochemistry , detection limit , nifedipine , calibration curve , analytical chemistry (journal) , chemistry , nuclear chemistry , inorganic chemistry , chromatography , nanotechnology , calcium , metallurgy
In this work a carbon paste electrode modified with multiwalled carbon nanotubes/β‐cyclodextrin (MWCNTs/β‐CD) was constructed and applied to the determination of nifedipine. The electrochemical behavior of nifedipine at this electrode was investigated using cyclic voltammetry and differential pulse voltammetry. Characterization of the modified electrode was conducted with electrochemical impedance spectroscopy and scanning electron microscopy. After adsorption of nifedipine on the MWCNTs/β‐CD paste electrode at 0.0 V for 6 min, a well defined reduction peak was produced in sodium hydroxide of 0.05 M. The calibration curve was linear from 7.0×10 −8 to 1.5×10 −5 M. The detection limit was obtained as 2.5×10 −8 M. The results demonstrated that this electrochemical sensor has excellent sensitivity and selectivity. This sensor was applied for determination of nifedipine in drug dosage and blood serum with excellent recoveries.