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Smartphone sensor for pesticide monitoring using CuO modified screen printed electrodes

Legitimate pesticide regulation and health concern around the world urge the demand for pesticide monitoring system. Conventional techniques are incapable for on-site and real time analysis. This work presents the development of an alternative method for pesticide detection using non-enzymatic electrochemical sensor. The design focuses on fabricating a low-cost, sensitive electrode capable of detecting the organophosphate pesticide. The screen-printed carbon electrodes were modified with copper oxide nanostructures and incorporated with near-field communication potentiostat for smartphone access. Cyclic voltammetry and chronoamperometry were used to quantify pesticide residues and presenting high sensitivity and low detection limit (< 10 ppb). Our smartphone sensor has demonstrated a promising platform for on-site pesticide meter for real vegetable sample.