ADSORPTIVE VOLTAMMETRIC BEHAVIOR OF ADENINE IN PRESENCE OF GUANINE AND SOME TRACE ELEMENTS AT THE STATIC MERCURY DROP ELECTRODE

An electrochemical stripping procedure is described for trace measurements of adenine by adsorption on a static mercury drop electrode. Cyclic voltammetry was used to characterize the interfacial and redox behavior. Optimum experimental conditions were found when using a 0.001 M NaOH solution, initial potential of + 0.01 V, scan rate of 5 mV s-1 and linear scan mode. The response of free adenine is linear over the concentration range 0.25–1.25 ppm. Linear scan voltammetry, without accumulation yields a detection limit of 55 ppb adenine. Proper conditions were tested to measuring adenine in presence of guanine, acridine orange, copper, zinc and ssDNA.