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Abstract
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{u00D7}10-7 to 1{u00D7}10-2 and 1{u00D7}10-7 to 1{u00D7}10-2 mol L-1 with a detection limit of 4.3{u00D7}10-7 and 1{u00D7}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