engleski

A new solid-state thiabendazole-selective sensor based on functionalized MWCNT

Thiabendazole (TBZ) is commonly used benzimidazole fungicide so its residues can be found in fruits and vegetables [1]. Considering TBZ potential toxicity, its concentration should be monitored to prevent the exposure to TBZ through the diet [2]. For that purpose, ion-selective electrode (ISE) could be convenient due to its simplicity [3]. In order to get better properties, ISE membrane can be modified with multi-walled carbon nanotubes (MWCNT) considering their unique properties [4]. The new solid-state TBZ-selective sensor, with liquid type of membrane, was prepared using MWCNT functionalized with a sulfate group and TBZ ion as a sensor material and dibutyl sebacate as a plasticizer. The direct potentiometry was used as a method for its characterization (response characteristics, dynamic response, influence of pH, selectivity). The applicability of newly developed sensor for TBZ determination was tested using fruit samples as the analytes. The standard addition method was used for confirmation of sensor accuracy and investigation of the possible matrix component interferences.

thiabendazole ; solid-state sensor ; ion-selective membrane ; MWCNT ; direct potentiometry

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