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A new voltammetric procedure was established for the analysis of adenosine-5’-triphosphate (ATP) with ionic liquid 1-butyl-2,3-dimethylimidazolium hexafluorophosphate (BMMImPF6) based carbon paste electrode (CPE). The modification of high conductive BMMImPF6 in CPE decreased the interfacial resistance and provided good electrocatalytic activity to accelerate the oxidation of ATP with the increment of the oxidation peak current. A well-defined irreversible oxidation peak of ATP was observed at 1.42 V in a pH 3.0 Britton-Robinson (B-R) buffer solution with an adsorptioncontrolled process, which was due to the interaction of ATP with the imidazolium group of ionic liquid used. The experimental conditions were optimized with the accumulation time of 80 s and the accumulation potential of 0.3 V. Under the optimum conditions with differential pulse voltammetry, the oxidation peak current showed a good linear relationship with ATP concentration from 0.3 to 700.0 μmol/L with the detection limit as 0.912 nmol/L (3 S/N). This method was not disturbed by the interferences from commonly coexisting compounds, which was applied to detect the drug samples with good recovery.

international journal of electrochemical science

Sensitive Electrochemical Determination of Adenosine-5’- triphosphate with 1-Butyl-2,3-dimethylimidazolium Hexafluorophosphate Based Carbon Paste Electrode