Determination of silver(I) by differential pulse voltammetry using a glassy carbon electrode modified with synthesized N-(2-aminoethyl)-4,4'-bipyridine

A new modified glassy carbon electrode (GCE) based on a synthesized N-(2-aminoethyl)-4,4'-bipyridine (ABP) was developed for the determination of Ag(I) by differential pulse voltammetry (DPV). ABP was covalently immobilized on GC electrodes surface using 4-nitrobenzendiazonium (4-NBD) and gluta...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2010-12, Vol.10 (12), p.11340-11351
Main Authors: Radulescu, Maria-Cristina, Chira, Ana, Radulescu, Medeea, Bucur, Bogdan, Bucur, Madalina Petruta, Radu, Gabriel Lucian
Format: Article
Language:English
Subjects:
Biosensing Techniques - instrumentation
Biosensing Techniques - methods
Biosensing Techniques - standards
Calibration
Carbon
Carbon - chemistry
Carbon - pharmacology
Chemistry
diazonium salt
differential pulse voltammetry
Electrochemistry - instrumentation
Electrochemistry - methods
Electrodes
Electrons
Environmental Monitoring - methods
Ethanolamine - chemistry
Ethylamines - chemical synthesis
Ethylamines - chemistry
Glass - chemistry
Humans
Ion-Selective Electrodes
Ligands
modified glassy carbon electrode
N-(2-aminoethyl)-4,4'-bipyridine
Potassium
Pyridines - chemical synthesis
Pyridines - chemistry
Reagents
Sensors
Silver
Silver - analysis
Silver - chemistry
Sodium
Voltammetry
Water Pollutants, Chemical - analysis
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Summary:A new modified glassy carbon electrode (GCE) based on a synthesized N-(2-aminoethyl)-4,4'-bipyridine (ABP) was developed for the determination of Ag(I) by differential pulse voltammetry (DPV). ABP was covalently immobilized on GC electrodes surface using 4-nitrobenzendiazonium (4-NBD) and glutaraldehyde (GA). The Ag(I) ions were preconcentrated by chemical interaction with bipyridine under a negative potential (-0.6 V); then the reduced ions were oxidized by differential pulse voltammetry and a peak was observed at 0.34 V. The calibration curve was linear in the concentration range from 0.05 μM to 1 μM Ag(I) with a detection limit of 0.025 μM and RSD=3.6%, for 0.4 μM Ag(I). The presence of several common ions in more than 125-fold excess had no effect on the determination of Ag(I). The developed sensor was applied to the determination of Ag(I) in water samples using a standard addition method.
ISSN:1424-8220
1424-8220
DOI:10.3390/s101211340