Determination of Silver(I) by Differential Pulse Voltammetry Using a Glassy Carbon Electrode Modified with Synthesized N-(2-Aminoethyl)-4,4'-Bipyridine

Sensors

Maria-Cristina Radulescu²  Ana Chira²  Medeea Radulescu¹  Bogdan Bucur²  Madalina Petruta Bucur² 

[1] Faculty of Chemistry, Department of Analytical Chemistry, University of Bucharest, Sos. Panduri No. 90, Sect. 5, Bucharest 050663, Romania; E-Mail:;Centre of Bioanalysis, National Institute of Research and Development for Biological Sciences, 296, Splaiul Independentei, Bucharest 060031, Romania; E-Mails:

关键词: differential pulse voltammetry;    diazonium salt;    modified glassy carbon electrode;    silver;    N-(2-aminoethyl)-4;    4′-bipyridine;   

DOI  :  10.3390/s101211340

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
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