Electrochemical detection of copper ion using a modified copolythiophene electrode

This paper studies the detection of copper ions by using an iminodiacetatic acid (IDA) modified conducting copolymer electrode. The copolymer film comprising 3-methyl thiophene (3MT) and 3-thiophene acetic acid (3TA) was chosen as the selective metal cation sensing electrode. The carboxylic group of...

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Bibliographic Details
Published in:Electrochimica acta 2009-11, Vol.54 (27), p.7012-7017
Main Authors: Lin, Meng, Cho, MiSuk, Choe, Woo-Seok, Son, Yongkeun, Lee, Youngkwan
Format: Article
Language:English
Subjects:
Chemistry
Copper ion
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Iminodiacetatic acid
Ion selective electrodes
Polythiophene
Square wave voltammetry
Voltammetric sensors
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Summary:This paper studies the detection of copper ions by using an iminodiacetatic acid (IDA) modified conducting copolymer electrode. The copolymer film comprising 3-methyl thiophene (3MT) and 3-thiophene acetic acid (3TA) was chosen as the selective metal cation sensing electrode. The carboxylic group of the copolymer was modified to produce IDA group for metal ion capture. The modified electrode was used for the electrochemical analysis of trace copper ions by square wave voltammetry (SWV) technique. The electrode was found to be highly selective to Cu 2+ in the range of 0.1–10 μM. The modified electrode offered an excellent way, with a high stability and reusability, for selective determination of Cu 2+ in a solution of mixed metal ions.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2009.07.025