利用格兰法，通过新型传感器直接电位法测定果皮中噻菌灵。

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

机构信息

Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.

Department of Organic and Pharmacological Chemistry, University of Pécs, Honvéd street 1, H-7624 Pécs, Hungary; János Szentágothai Research Center, Ifjúság street 20, H-7624 Pécs, Hungary.

出版信息

Food Chem. 2022 Oct 30;392:133290. doi: 10.1016/j.foodchem.2022.133290. Epub 2022 May 21.

DOI:10.1016/j.foodchem.2022.133290

PMID:35660977

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 ion-selective 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∙10-1.0∙10 M), and a low limit of detection (3.2·10 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.

摘要

一种用于直接电位法测定噻菌灵（TBZ）的新型传感器已经制备成功。噻菌灵阳离子和 5-磺基水杨酸阴离子的离子对被用作新型传感器材料，用于 TBZ 测定的液态离子选择性电极膜中。为了优化 TBZ 测定用传感器的膜，对六种不同的增塑剂和传感器材料在膜中的含量进行了研究。选择以癸二酸二丁酯（DS）为增塑剂、膜中传感器材料含量为 1%的传感器，对 TBZ 具有 Nernstian 响应（62.2 mV/decade of activity），工作范围宽（8.6∙10-1.0∙10 M），检测限低（3.2·10 M）。此外，它还被证明是一种准确可靠的传感器，可用于纯品和实际样品（橙子、柠檬和香蕉的果皮）中的 TBZ 测定，可使用直接电位法和 Gran 法进行测定。