Using 2-[(thiophene-2-yl-methylene)-amino]-isoindole-1,3-dione as a new selector element to develop the potentiometric iron (III) - selective electrode

A new Fe3+ ions selective electrode based on 2-[(thiophene-2-yl-methylene)-amino]-isoindole- 1,3-dione was prepared to apply as an indicator electrode in the potentiometric cell. The best electrode response was observed in the slope (20.1±0.9 mV per decade) over a wide neodymium ion concentration range of 1.0×10-6 to 1.0×10-2 M with a detection limit of 8.5×10−7M.