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Beheshti SS, Sohbat F, Amini MK. A manganese porphyrin-based sensor for flow-injection potentiometric determination of thiocyanate. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424610001830] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Metalloporphyrin-based ion-selective electrodes for flow-injection potentiometric determination of thiocyanate are described. The detection system is based on a coated glassy carbon electrode membrane sensor incorporating 5,10,15,20-tetraphenyl-21H,23H-porphine manganese(III) chloride as the active ingredient. The influences of the membrane composition, pH, and the effects of flow-injection parameters on the response of the system were investigated. At the optimized flow-injection potentiometric conditions, the sensor exhibited a Nernstian slope of -58.0 mV per decade of thiocyanate activity over the range 4.2 × 10-7–7.6 × 10-2M , where 50 μL of each sample solution was injected into the carrier solution. The detection limit of thiocyanate in the FIP mode was 4.2 × 10-7M . The selectivity of the flow-injection potentiometric system with respect to several common inorganic and organic anions was superior to that of the batch mode using the same sensor and similar operating conditions. The sensor was applied to the determination of thiocyanate in urine samples.
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Affiliation(s)
- Saeed S. Beheshti
- Department of Chemistry, University of Isfahan, Isfahan 81744-73441, I.R. Iran
| | - Fatemeh Sohbat
- Department of Chemistry, University of Isfahan, Isfahan 81744-73441, I.R. Iran
| | - Mohammad K. Amini
- Department of Chemistry, University of Isfahan, Isfahan 81744-73441, I.R. Iran
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Thiocyanate: selective membrane electrode based on macrotricyclic binuclear Cu(II)–Schiff base complex. J INCL PHENOM MACRO 2009. [DOI: 10.1007/s10847-009-9557-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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