Potentiometric Sensors for Iodide and Bromide Based on Pt(II)-Porphyrin

Sensors

Dana Vlascici¹  Gheorghe Fagadar-Cosma²  Manuela Crisan³  Eugenia Fagadar-Cosma³  Nicoleta Plesu³  Mihaela Petric³  Anca Lascu³  Anca Belean³ 

[1] Faculty of Chemistry, Biology, Geography, West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223, Romania;Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Pta Victoriei 2, Timisoara 300006, Romania;Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania;

关键词: Pt-metalloporphyrin;    ion-selective electrode;    potentiometry;    iodide;    bromide;    PVC membrane;   

DOI  :  10.3390/s18072297

来源: DOAJ

【 摘 要 】

Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) was used in the construction of new ion-selective sensors. The potentiometric response characteristics (slope and selectivity) of iodide and bromide-selective electrodes based on (PtTMeOPP) metalloporphyrin in o-nitrophenyloctylether (NPOE), dioctylphtalate (DOP) and dioctylsebacate (DOS) plasticized poly(vinyl chloride) membranes are compared. The best results were obtained for the membranes plasticized with DOP and NPOE. The sensors have linear responses with near-Nernstian slopes toward bromide and iodide ions and good selectivity. The membrane plasticized with NPOE was electrochemically characterized using the EIS method to determine its water absorption and the diffusion coefficient into the membrane.

【 授权许可】

Unknown