Epoxy Matrix Membrane Potentiometric Sensor Based on Zirconium Titanium Phosphate Ion Exchanger for Flow Injection Analysis of Nitrite

Hassan, Saad S. M.; Marei, S. A.; Badr, Ibrahim H. A.; Arida, Hassan

doi:10.1002/1521-4109(200011)12:16<1312::aid-elan1312>3.0.co;2-l

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…The potentiometric selectivity coefficients (K pot SCN,J) of thiocyanate sensors based on the Cu-PADAP complex in a PVC membrane plasticized with o-nitrophenyloctyl ether (o-NPOE) with and without anionic and cationic additives were evaluated using the separate solutions method, 36,37 with EMF values measured in 0.1 M salt solutions and theoretical slope values. Although, the calibration slopes of most interfering ions measured with anionic additive containing membranes were sub-Nernstian, the theoretical slope values were used instead for calculating their selectivity coefficients.…”

Section: Potentiometric Characteristics Of Thiocyanate Membrane Sensorsmentioning

confidence: 99%

A Novel Poly(vinyl chloride) Matrix Membrane Sensor for Batch and Flow-Injection Determinations of Thiocyanate, Cyanide and Some Metal Ions

et al. 2009

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Section: Potentiometric Characteristics Of Thiocyanate Membrane Sensorsmentioning

confidence: 99%

A Novel Poly(vinyl chloride) Matrix Membrane Sensor for Batch and Flow-Injection Determinations of Thiocyanate, Cyanide and Some Metal Ions

et al. 2009

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“…[24][25][26] Logarithm Hg 2+ concentrations (log aHg) and the interfering ions (B) vs. sensor response (E) was independently obtained. The intersection of the extrapolated linear portions of this plot indicated the value of the concentration of interfering ion (aB).…”

Section: Sensor Selectivitymentioning

confidence: 99%

Mercury(II) Ion-Selective Polymeric Membrane Sensors for Analysis of Mercury in Hazardous Wastes

et al. 2006

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Reagents and chemicalsAll reagents used were of analytical grade; deionized water Two novel potentiometric sensors that are highly selective to Hg 2+ ions are described. These are based on the use of 5,5′-dithio-bis(2-nitrobenzoic acid) (DTNB) and tricyclazole (TCZ) as neutral carriers in plasticized poly(vinyl chloride) membranes. Fast Nernstian responses are obtained for Hg 2+ ions over the concentration ranges 7.0 × 10 -6 -1.0 × 10 -2 and 7.7 × 10 -6 -1.0 × 10 -2 mol l -1 at pH 1.8 -3.3 with lower detection limits of 5.0 × 10 -6 and 5.6 × 10 -6 mol l -1 (∼1 μg ml -1 ) and calibration slopes of 30.0 and 29.7 mV decade -1 with DTNB-and TCZ-based membrane sensors, respectively. Validation of the assay method reveals good performance characteristics, including long life span, good selectivity for Hg 2+ ions over a wide variety of other metal ions, long term response stability, and high reproducibility. Applications for direct determination of mercury in hazardous wastes including dental amalgam, mercury bulbs, and fluorescent lamps give results with good correlation with data obtained using cold vapor atomic absorption spectrometry.

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“…Exploiting the volatility of acidified nitrite (yielding nitrous acid, HNO 2 ) through micro-distillation and the subsequent potentiometric detection has proven to provide both improved sensitivity (LOD: 5 mg L 21 , 0.1 mM) and selectivity. 59 Interference from sulfite and sulfide was noted and can be ascribed to the volatility of their acidified forms (H 2 S, SO 2 ). Care would clearly need to be taken when considering the applicability of the approach to industrial samples where these species are liable to be present at significant levels (effluent discharge from paper processing/tanneries etc).…”

Section: Electrochemical Detectionmentioning

confidence: 99%

Current strategies in nitrite detection and their application to field analysisThe opinions expressed in the following article are entirely those of the authors and do not necessarily represent the views of The Royal Society of Chemistry, the Editor or the Editorial Board of JEM.

Dutt

Davis

2002

J. Environ. Monitor.

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The various analytical protocols that have been developed to aid the measurement of nitrite within environmental samples have been critically appraised and their applicability to field measurement assessed. The present communication presents a perspective on current techniques and technologies encompassing spectroscopic, electrochemical and chromatographic methodologies and highlights those that are liable to emerge in the near future. Commercial devices have been included and where appropriate the advantages and limitations posed by their operation within field contexts have been described.

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Epoxy Matrix Membrane Potentiometric Sensor Based on Zirconium Titanium Phosphate Ion Exchanger for Flow Injection Analysis of Nitrite

Cited by 6 publications

References 15 publications

A Novel Poly(vinyl chloride) Matrix Membrane Sensor for Batch and Flow-Injection Determinations of Thiocyanate, Cyanide and Some Metal Ions

A Novel Poly(vinyl chloride) Matrix Membrane Sensor for Batch and Flow-Injection Determinations of Thiocyanate, Cyanide and Some Metal Ions

Mercury(II) Ion-Selective Polymeric Membrane Sensors for Analysis of Mercury in Hazardous Wastes

Current strategies in nitrite detection and their application to field analysisThe opinions expressed in the following article are entirely those of the authors and do not necessarily represent the views of The Royal Society of Chemistry, the Editor or the Editorial Board of JEM.

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