A Novel Iron(III)-Selective Membrane Potentiometric Sensor Based on 5-Chloro-3-[4-(trifluoromethoxy) phenylimino] Indolin-2-one

Title:A Novel Iron(III)-Selective Membrane Potentiometric Sensor Based on 5-Chloro-3-[4-(trifluoromethoxy) phenylimino] Indolin-2-one

Volume: 11 Issue: 1

Author(s): Ersin Demir, Barıs Kemer, Olcay Bekircan and Hassan Y. Aboul-Enein

Affiliation:

Keywords: Fe³⁺-selective electrode, PVC membrane, All-solid-state, determination of Fe³⁺, potentiometer.

Abstract: A novel polyvinyl chloride (PVC) membrane sensor that is highly selective to Fe³⁺ ions was prepared by using 5-chloro-3-[4-(trifluoromethoxy)phenylimino]indolin-2-one (CFMEPI) ionophore. The sensor exhibits a Nernstian response for Fe³⁺ ions over a wide concentration range (1.0 ×10^-2 -1.0×10^-6M) with a slope of 46.7±0.5 mV per decade. The sensor has a response time of 20s and can be used for at least 3 months without any measurable divergence in potential. It was concluded that the sensor response was pH independent in the range of 4.0-8.61. The sensor has some advantages such as short analysis time, particularly high selectivity towards iron (III). The sensor was used successfully for direct determination of Fe³⁺ in several synthetic and real samples with satisfactory results.

Cite this article as:

Demir Ersin, Kemer Barıs, Bekircan Olcay and Aboul-Enein Y. Hassan, A Novel Iron(III)-Selective Membrane Potentiometric Sensor Based on 5-Chloro-3-[4-(trifluoromethoxy) phenylimino] Indolin-2-one, Current Analytical Chemistry 2015; 11 (1) . https://dx.doi.org/10.2174/1573411010666141111224325