Abstract

A novel electrochemical sensing platform was developed that is based on the modification of a glassy carbon electrode with acetylene black and ionic liquids. The resulting electrode exhibited excellent electrocatalytic activity towards trifluralin in showing markedly increased redox peak currents. The experimental parameters affecting the response to trifluralin were optimized. Under optimal conditions, a linear response was obtained in the range from 80 nM to 12 µM of trifluralin (R = 0.9994). The detection limit is 10 nM (at S/N = 3) after open-circuit accumulation for 120 s. The method was successfully applied to determine trifluralin in soil samples. Features such as a large electroactive area, fast electron transfer and low background current make this composite electrode a promising platform for fabricating reliable electrochemical sensors for various species.

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