Abstract
Cathodic adsorptive electrochemical behavior of cytosine in the presence of acridine orange (DNA‐intercalating dye) at the static mercury drop electrode was investigated. A 0.001 M NaOH solution containing 2 ppm of acridine orange was found to be the optimal supporting electrolyte. Other optimum experimental conditions were found to be as follows: the initial potential at 0.00 V, linear n, and the potential scan rate at 50 mV s−1. The analytical response was found to be linear in a range of cystosine concentrations from 0.30 ppm to 1.1 ppm. For a direct response, the detection limit was 1.2 ppb. The presence of ssDNA and the interference of some trace metals were also investigated.
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