Iron-Selective Electrode Based on Phosphorylated Calix-6-Arene Derivative


The construction and performance characteristics of a novel Iron(III) membrane sensor based on (37-bis-[(diethoxy-thiophosphoryl)-oxy]-5,11,17,23,29,35-hexa-kis-(1,1-dimethylethyl)-calix[6]-arene-38,39,40,41,42-pentol) (A) were reported in this paper. The sensor was prepared by incorporating compound (A) into a plasticized polyvinyl chloride PVC membrane. The electrode reveals a Nernstian behavior over a wide iron ion concentration range (1.0 × 10-2 - 1.0 × 10-4 mol·L-1), and relatively low detection limit (1.0 × 10-5 mol·L-1). The potentiometric response was independent on the pH of the solution in the range of 4 - 7. The electrode showed a very short response time (<5 s). It exhibited very good selectivity relative to a wide variety of metal cations. Correlation of selectivity coefficient values with ionic radii of interferent cations was discussed. The proposed iron- ISE was applied for analysis of iron containing samples with comparison to a recommended spectrophotometric method.

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Zareh, M. , Zordek, W. and Abd-Alhady, A. (2014) Iron-Selective Electrode Based on Phosphorylated Calix-6-Arene Derivative. Journal of Sensor Technology, 4, 186-194. doi: 10.4236/jst.2014.44018.

Conflicts of Interest

The authors declare no conflicts of interest.


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