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

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

Journal Name: Current Analytical Chemistry

Volume 11 , Issue 1 , 2015

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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.

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

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Article Details

VOLUME: 11
ISSUE: 1
Year: 2015
Page: [29 - 35]
Pages: 7
DOI: 10.2174/1573411010666141111224325

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