Electroanalytical Studies on Fe(III) Ion-Selective Sensors Based on 2-methyl-6-(4-methylenecyclohex-2-en-1-yl)hept-2-en-4-one Ionophore

• Published in: International journal of electrochemical science 2015-01, Vol.10 (1), p.564-578
• Main Authors: Ali, Tamer Awad, Mohamed, Gehad G., Farag, Amal H.
• Format: Article
• Language: English
• Subjects: 2-methyl-6-(4-methylenecyclohex-2-en-1-yl)hept-2-en-4-one (MMCHH); Determination of iron(II); Modified carbon paste sensor; Modified screen-printed sensor; Water Samples
• ISSN: 1452-3981; 1452-3981
• DOI: 10.1016/S1452-3981(23)05014-9

A new Fe(III) ion-selective screen-printed and carbon paste sensors based on 2-methyl-6-(4-methylenecyclohex-2-en-1-yl)hept-2-en-4-one (MMCHH) has been developed. The electrodes displayed a linear potential response over the wide concentration range from 4.3×10-7 to 1×10-2 and 1×10-7 to 1×10-2 mol L-1 with a detection limit of 4.3×10-7 and 1×10-7 mol L-1 for modified carbon paste (MCPEs; electrodes I and II) and screen-printed sensors (MSPEs; electrodes III and IV), respectively. The slopes of the calibration graphs are 18.5±0.9 and 19.3±0.5 for MCPEs with tricresylphosphate (TCP) (sensor I) and o-nitrophenyloctylether (o-NPOE) (sensor II) as plasticizers, respectively. Also, the MSPEs show good potentiometric slopes of 19.1±0.2 and 19.8±0.05 mV decade-1 with TCP (sensor III) and o-NPOE (sensor IV), respectively. The electrodes show stable and reproducible potential over a period of 55, 70, 130 and 150 days for sensors (I), (II), (III) and (IV), respectively. The sensors possessed some advantages such as short conditioning time, very fast response time (