Abstract
The fabrication of an electrode modified with cadmium selenide/methylene blue{CdSe/MB}n multilayer films is introduced via assembling layer-by-layer CdSe and methylene blue on the glassy carbon electrode surface. The multilayer films have been investigated by scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry. The electrode exhibited a good stability for the simultaneous determination of guanine and adenine in DNA. The experimental parameters were optimized and the limit of detection (S/N = 3) for guanine and adenine was 0.3 ng·mL−1 and 0.9 ng·mL−1, respectively, under the optimum conditions. A direct electrochemical method for simultaneous determination of guanine and adenine in DNA is presented.
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This work was supported by the National Natural Science Foundation and Program for Innovative Research Team in Anhui Normal University.
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Zhu, H., Zhao, GC. Fabrication of CdSe and methylene blue multilayer film for the determination of adenine and guanine in DNA. Microchim Acta 165, 329–334 (2009). https://doi.org/10.1007/s00604-009-0138-2
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DOI: https://doi.org/10.1007/s00604-009-0138-2