Sensitive determination of adenine on poly(amidosulfonic acid)-modified glassy carbon electrode |
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Authors: | Rui Zhang Gendi Jin Xiaoya Hu |
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Institution: | (1) College of Chemistry and Engineering, Yangzhou University, 88 South University Avenue, Yangzhou, China |
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Abstract: | 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 B4 with satisfactory results. |
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Keywords: | Adenine Poly-ASA-modified GCE Differential pulse voltammetry Enhanced sensitivity |
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