A new sensor for direct potentiometric determination of thiabendazole in fruit peels using the Gran method

Budetic, Mateja and Smardzic, Mirela and Bubnjar, Karlo and Dandic, Andrea and Zivkovic, Pavo and Széchenyi, Aleksandar and Kiss, László (2022) A new sensor for direct potentiometric determination of thiabendazole in fruit peels using the Gran method. FOOD CHEMISTRY, 392. p. 133290. ISSN 0308-8146 (print); 1873-7072 (online)

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Abstract

A new sensor for direct potentiometric determination of thiabendazole (TBZ) was prepared. The ionic pair of TBZ cation and the 5-sulfosalicylate anion was used as the new sensor material incorporated in liquid type of ionselective electrode membrane for TBZ determination. For optimization of the membrane of the sensor for TBZ determination, six different plasticizers and the content of the sensor material in the membrane were varied. The chosen sensor with dibutyl sebacate (DS) as plasticizer and 1% of sensor material in the membrane was characterized with Nernstian response towards TBZ (62.2 mV/decade of activity), a wide working range (8.6•10− 7–1.0•10− 3 M), and a low limit of detection (3.2⋅10− 7 M). Also, it proved to be an accurate and reliable sensor for TBZ determination in pure and real samples (peel of oranges, lemons and bananas) where it was determined using direct potentiometry and Gran method.

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