Abstract
In this study, rapid electrochemical sensing systems for detection of arsenate by oxidation of l-cysteine are proposed. Three different sensing systems comprising of screen-printed electrode and standard electrodes were used for this study. The detector element i.e. l-cysteine was immobilized on the working electrodes of the transducers by in-situ polymerization of acylamide. The electrocatalytic oxidation of l-cysteine was performed by cyclic voltammentry and amperometry. All the systems presented linear response range up to 30μgL−1 of arsenic. The sensors were able to estimate arsenic below 10μgL−1 with a detection limit of 1.2–4.6μgL−1.
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