Hydrogen ion-selective poly(vinyl chloride) membrane electrode based on a p-tert-butylcalix[4]arene-oxacrown-4

Demirel, Ayça; Doğan, Alev; Canel, Esin; Memon, Shahabuddin; Yılmaz, Mustafa; Kılıç, Esma

doi:10.1016/s0039-9140(03)00414-4

Cited by 65 publications

(40 citation statements)

References 35 publications

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“…Tetrahydrofuran (THF) (Merck) (after its distillation), nitrophenyl octyl ether (NPOE), bis-(2-ethoxyl) sebacate (DOS), dodecyl phthalate (DDP) (Fluka), high molecular weight PVC (Fluka), N,N′-bisethoxycarbonyl -1,10-diaza-4,7,13,16-tetraoxacyclo-octadecane (diaza-18-crown-6) (DZCE) (synthesized using the procedures described previously), 16 and 37,40-bis[(diethoxy-thiophosphoryl)oxy]-5,11,17,23,29,35-hexakis(1,1-dimethylethyl)-calix [6]arene-8,39,41,42-tetrol (CAX) (synthesized by previously described procedures) 17 were used for the preparation of all the membranes. Sulfuric acid, nitric, hydrochloric, acetic, propionic, tartaric, and citric acids were purchased from Panreac, Spain.…”

Section: Reagents and Materialsmentioning

confidence: 99%

“…Liu et al 5 incorporated derivatives of calix [4]-aza-crown in polymeric ion selective electrodes for pH sensing. Demirel et al 6 used p-tert-butylcalix [4]arene-oxacrown-4 as an ionophore for hydrogen ion-selective poly(vinyl chloride) (PVC) electrode.…”

Section: Introductionmentioning

confidence: 99%

“…Usually they are applied for alkali metal ions like Na + and K + . 14,15 In the present study, new ionophoric sensors were introduced for the determination of H + based on either diaza-18-crown-6-ether, or phosphorated calix [6]arene derivative. Both ionophores were locally synthesized and were used for the preparation of the electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…Both phosphorated calix [6]arene and a N,N′-bisethoxycarbonyl-1,10-diaza-4,7,13,16-tetraoxacyclo-octadecane (DZCE) were used as new H + -ionophores. The calibration graphs of the obtained electrodes exhibits satisfactory Nernstian slopes.…”

mentioning

confidence: 99%

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Blank Membranes versus Ionophore-based Membranes for the Selective Determination of H+

Zаrеh

2009

ANAL. SCI.

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A pH electrode for the selective determination of H + was introduced. Both phosphorated calix [6]arene and a N,N′-bisethoxycarbonyl-1,10-diaza-4,7,13,16-tetraoxacyclo-octadecane (DZCE) were used as new H + -ionophores. The calibration graphs of the obtained electrodes exhibits satisfactory Nernstian slopes. The electrodes were compared to blank membranes (without any ionophoric substances) for the first time. Selectivity coefficients of the studied electrodes towards several inorganic cations were calculated. The relative selectivity coefficient (RSC) was applied for evaluating the selectivity properties of H + -electrode using a mathematical equation. The electrodes were applied for the determination of different inorganic and organic acids.

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Section: Reagents and Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Blank Membranes versus Ionophore-based Membranes for the Selective Determination of H+

Zаrеh

2009

ANAL. SCI.

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“…The reason for that inflection may be attributed to saturation of the membrane or its inhomogenety. 21 …”

Section: Influence Of the Membrane Compositionmentioning

confidence: 99%

A Novel Membrane Sensor for Histamine H1-Receptor Antagonist “Fexofenadine”

2004

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The construction and general performance of thirteen new polymeric membrane sensors for the determination of fexofenadine hydrochloride based on its ion exchange with reineckate, tetraphenylborate and tetraiodomercurate have been studied. The effects of membrane composition, type of plasticizer, pH value of sample solution and concentration of the analyte in the sensor internal solution have been thoroughly investigated. The novel sensor based on reineckate exchanger shows a stable, potentiometric response for fexofenadine in the concentration range of 1 × 10 -2 -2.5 × 10 -6 M at 25˚C that is independent of pH in the range of 2.0 -4.5. The sensor possesses a Nernstian cationic slope of 62.3 ± 0.7 mV/concentration decade and a lower detection limit of 1.3 × 10 -6 M with a fast response time of 20 -40 s. Selectivity coefficients for a number of interfering ions and excipients relative to fexofenadine were investigated. There is negligible interference from almost all studied cations, anions, and pharmaceutical excipients, however, citrizine that has a structure homologous to that of fexofenadine was found to interfere. The determination of fexofenadine in aqueous solution shows an average recovery of 99.83% with a mean relative standard deviation (RSD) of 0.5%. Direct potentiometric determination of fexofenadine in tablets gave results that compare favorably with those obtained by standard spectrophotometric methods. Potentiometric titration of fexofenadine with phosphomolybdic acid as a titrant has been monitored with the proposed sensor as an end point indicator electrode.

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Silver(I)‐Selective PVC Membrane Potentiometric Sensor Based on a Recently Synthesized Calix[4]arene

et al. 2006

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A new PVC membrane potentiometric sensor for Ag(I) ion based on a recently synthesized calix[4]arene compound of 5,11,17,23-tetra-tert-butyl-25,27-dihydroxy-calix[4]arene-thiacrown-4 is developed. The electrode exhibits a Nernstian response for Ag(I) ions over a wide concentration range (1.0 Â 10 À2 À 1.0 Â 10 À6 M) with a slope of 53.8 AE 1.6 mV per decade. It has a relatively fast response time (5 -10 s) and can be used for at least 2 months without any considerable divergence in potentials.

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Hydrogen ion-selective poly(vinyl chloride) membrane electrode based on a p-tert-butylcalix[4]arene-oxacrown-4

Cited by 65 publications

References 35 publications

Blank Membranes versus Ionophore-based Membranes for the Selective Determination of H+

Blank Membranes versus Ionophore-based Membranes for the Selective Determination of H+

A Novel Membrane Sensor for Histamine H1-Receptor Antagonist “Fexofenadine”

Silver(I)‐Selective PVC Membrane Potentiometric Sensor Based on a Recently Synthesized Calix[4]arene

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