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Sensitive determination of adenine on poly(amidosulfonic acid)-modified glassy carbon electrode

A novel and reliable direct electrochemical method was established for the detection of adenine, based on the differential pulse anodic stripping response at a poly(amidosulfonic acid) (poly-ASA)-modified glassy carbon electrode (GCE) fabricated by electropolymerization. The characterization of elec...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2009-10, Vol.13 (10), p.1545-1552
Main Authors: Zhang, Rui, Jin, Gendi, Hu, Xiaoya
Format: Article
Language:English
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Summary:A novel and reliable direct electrochemical method was established for the detection of adenine, based on the differential pulse anodic stripping response at a poly(amidosulfonic acid) (poly-ASA)-modified glassy carbon electrode (GCE) fabricated by electropolymerization. The characterization of electrochemically synthesized poly-ASA film was investigated by atomic force microscopy, electrochemical impedance spectroscopy, and voltammetric methods. This poly-ASA-modified GCE could greatly enhance the detection sensitivity of adenine. At optimum conditions, the anodic peak exhibits a good linear concentration dependence in the range from 3.0 × 10 −8 to 1.0 × 10 −6  M ( r  = 0.9994). The detection limit is 8.0 × 10 −9  M ( S / N  = 3). The proposed method could be used to determinate the adenine in tablets of vitamin B 4 with satisfactory results.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-008-0726-9