Abstract
Screen-printed electrodes modified with appropriate mediators have been used for the reliable determination of dithiocarbamate fungicides and alkylphenols. A sensor based on immobilization of aldehyde dehydrogenase on the surface of a disposable screen-printed carbon-paste electrode, chemically modified with Meldola’s blue mediator, was used for the determination of a soil fumigant, metham-sodium and its main toxic metabolite MITC. This sensor allowed us to discriminate between metham-sodium and its metabolite MITC, as metham-sodium did not inhibit AlDH, while MITC could be detected at 100 ppb levels. Further, a new nanocomposite was developed by combination of Prussian blue mediator and single-walled carbon nanotubes (SWNTs). Prussian blue and SWNTs exhibit synergistic electrocatalytic effect toward the hydrogen peroxide reduction. The nanocomposite sensor exhibited excellent sensitivity, 119.62 mA·M−1·cm−2, a detection limit of 0.64 μM, fast response time of 10 sec and a wide linear range up to 2 mM.
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Gurban, AM., Rotariu, L., Tudorache, M., Bala, C., Noguer, T. (2009). Development of Biological Sensors Based on Screen-Printed Electrodes for Environmental Pollution Monitoring. In: Baraton, MI. (eds) Sensors for Environment, Health and Security. NATO Science for Peace and Security Series C: Environmental Security. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9009-7_26
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DOI: https://doi.org/10.1007/978-1-4020-9009-7_26
Publisher Name: Springer, Dordrecht
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