application of n-4,4'-azodianiline(ferrocenyl schiff base) for electrocatalytic determination of atenolol on modified carbon paste electrode
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abstract
a carbon-paste electrode (cpe) chemically modified with the n-4,4'-azodianiline(ferrocenyl schiff base) complex and multi wall carbon nanotubes (adafcnte) was used as a highly sensitive electrochemical sensor for determination of trace amounts of atenolol. the oxidation peak potentials in cyclic voltammogram of adafcnte occurred around 550 mv vs ag/agcl (at ph 6.0) while this peak potential at the carbon paste electrode appeared around 800 mv at the same scan rate of 10 mv s−1. the kinetic parameters such as electron transfer coefficient, α, and rate constant for chemical reaction between atenolol and redox sites in modified electrode were 0.41 and 2.8×102 cm3 mol-1 s-1, respectively. the catalytic peak current was linearly dependent on atenolol concentration in the range of 0.1-57.0 µmol l-1 with a detection limit of 0.08 µmol l-1. finally, the sensor was examined as a selective, simple and precise new electrochemical sensor for the determination of atenolol in urine samples, with satisfactory results.
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Journal title:
iranian chemical communicationجلد ۳، شماره Issue ۱ (pp. ۱-۸۴)، صفحات ۱۹-۳۱
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