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Combination of screen-printed electrodes and batch injection analysis: A simple, robust, high-throughput, and portable electrochemical system

2014; Elsevier BV; Volume: 202; Linguagem: Inglês

10.1016/j.snb.2014.04.096

1873-3077

Thiago F. Tormin, Rafael R. Cunha, Rodrigo Amorim Bezerra da Silva, Rodrigo A.A. Muñoz, Eduardo M. Richter,

Analytical Chemistry and Sensors

To date, both screen-printed electrodes (SPEs) and batch injection analysis (BIA) systems are separately used in the development of analytical methods with portable characteristics. In this work, for the first time, a BIA cell was designed to adapt SPEs for use as a robust portable electroanalytical system. This system in combination with other battery-powered components (electronic pipette, mini-potentiostat, and laptop computer) can be operated outside a laboratory, in the absence of an external power supply. The performance of the portable system has been evaluated using diclofenac, hydrogen peroxide and metals (Pb, Cu, and Hg) as model analytes. In addition to the portability characteristics (low cost, low-power requirements, quick response, simplicity, robustness, and minimal sample size requirements), the proposed approach also allows the implementation of simple and effective strategies to prevent or minimize the gradual fouling of the electrode surface (common limitation of solid electrodes). Therefore, the proposed portable electrochemical system offers promise to increase the use of electrochemical methods for point-of-care or on-site analysis.