scholarly journals A New Ritodrine Selective Electrode and its Pharmaceutical Application

2010 ◽  
Vol 7 (s1) ◽  
pp. S103-S110 ◽  
Author(s):  
Reda Ammar
Keyword(s):  
Pharmaceutical Preparations ◽  
Pvc Membrane ◽  
Membrane Electrode ◽  
Membrane Composition ◽  
Pharmaceutical Application ◽  
Electrode Potentials ◽  
Ritodrine Hydrochloride ◽  
Pvc Membrane Electrode ◽  
Different Temperatures ◽  
Ph Range

A novel ritodrine hydrochloride ion-selective PVC membrane electrode based on ion-pair complex of ritodrine-tetra phenyl borate was prepared withdi-n-butyl phosphate as a plasticizer. The influences of membrane composition, temperature, pH of the test solution and foreign ions on the electrode performance were investigated. The electrode showed a Nernstian response over a wide ritodrine concentration range (1×10−5- 1×10−2M) with a slope of 59.33 mV decade−1and was found to be very selective, precise and usable within the pH range 3-7.5. The standard electrode potentials, E°, were determined at different temperatures and used to calculate the isothermal temperature coefficient (dE°/dT) of the electrode, which was 0.00075. The electrode was successfully used for potentiometric determination of ritodrine hydrochloride both in pure solutions and in pharmaceutical preparations.

Selective Membrane Electrode Potentiometry and Spectrophotometry of a Photochemical Reaction of Thioredazine Hydrochloride

1988 ◽  
Vol 71 (5) ◽  
pp. 1042-1045
Author(s):  
Adel F Shoukry ◽  
Sayed S Badawy
Keyword(s):  
Pvc Membrane ◽  
Membrane Electrode ◽  
Isothermal Temperature ◽  
Electrode Potentials ◽  
Pvc Membrane Electrode ◽  
Coated Wire ◽  
Different Temperatures ◽  
Selective Membrane ◽  
Standard Electrode Potentials ◽  
Ph Range

Abstract A PVC membrane electrode of the coated wire type was prepared which is selective for thioredazine. It showed a Nernstian response over a thioredazine concentration range 6.3 x 10 «to 2.5 x 10_3M, at 25°C, and was selective, precise, and usable within the pH range 2.1-7.0. The standard electrode potentials, E°, were determined at different temperatures and used to calculate the isothermal temperature coefficient of the electrode. The photoreaction occurring in thioredazine solution exposed to daylight did not affect the electrode performance. This reaction was investigated kinetically to determine its rate constant and half-life at different temperatures.

scholarly journals Tin(II) Selective PVC Membrane Electrode Based on Salicylaldehyde Thiosemicarbazone as an Ionophore

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Sulekh Chandra ◽  
Kusum Sharma ◽  
Adarsh Kumar
Keyword(s):  
High Sensitivity ◽  
Fast Response ◽  
Polymeric Membrane ◽  
Pvc Membrane ◽  
Membrane Electrode ◽  
Membrane Composition ◽  
Pvc Membrane Electrode ◽  
Trivalent Cations ◽  
Nernstian Slope ◽  
Ph Range

A polymeric membrane-based tin selective electrode was developed by using salicylaldehyde thiosemicarbazone (STSC). The best performance was recorded with a membrane composition of PVC : TBP : ionophore : NaTPB as 28 : 59 : 8 : 5 (w/w%). The Nernstian slope calculated from the calibration curve for Sn2+sensor was28.8±0.4 mV/decade. The detection limit of the sensor was2.10×10−8 M, in the linear concentration range of1.0×10−2−1.1×10−7 M. It was relatively fast response time (<8 s for concentration≥1.0×10−4and <12 s for concentration of≥1.0×10−6 M) and can be used for 9 months without any considerable divergence in potentials. The proposed sensor exhibit relatively good selectivity and high sensitivity for tin(II) as other mono-, di-, and trivalent cations and can be used in a pH range of 2.0–8.5. The analytical usefulness of the proposed electrode has been evaluated by its application in the determination of stannous in artificially made samples.

scholarly journals An Enantioselective Potentiometric Sensor for 2-Amino-1-Butanol Based on Chiral Porous Organic Cage CC3-R

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 420 ◽  
Author(s):  
Bang-Jin Wang ◽  
Ai-Hong Duan ◽  
Jun-Hui Zhang ◽  
Sheng-Ming Xie ◽  
Qiu-E Cao ◽  
...  
Keyword(s):  
Polyvinyl Chloride ◽  
Potentiometric Sensor ◽  
Pvc Membrane ◽  
Membrane Electrode ◽  
Pvc Membrane Electrode ◽  
Application Potential ◽  
Ph Range

Porous organic cages (POCs) have attracted extensive attention due to their unique structures and tremendous application potential in numerous areas. In this study, an enantioselective potentiometric sensor composed of a polyvinyl chloride (PVC) membrane electrode modified with CC3-R POC material was used for the recognition of enantiomers of 2-amino-1-butanol. After optimisation, the developed sensor exhibited enantioselectivity toward S-2-amino-1-butanol ( log K S , R P o t = −0.98) with acceptable sensitivity, and a near-Nernstian response of 25.8 ± 0.3 mV/decade within a pH range of 6.0–9.0.

scholarly journals Construction of Eu3+Ion-Selective Electrode Based on 1,2-Diaminopropane-N,N,N',N'-tetraacetic acid

2011 ◽  
Vol 8 (s1) ◽  
pp. S467-S473 ◽  
Author(s):  
Mohammad Reza Abedi ◽  
Hassan Ali Zamani
Keyword(s):  
Alkaline Earth ◽  
Dynamic Range ◽  
Pvc Membrane ◽  
Membrane Electrode ◽  
Tetraacetic Acid ◽  
Pvc Membrane Electrode ◽  
Nernstian Slope ◽  
Wide Linear Dynamic Range ◽  
Ph Range

A new Eu3+PVC membrane electrode based on 1,2-diaminopropane-N, N,N',N'-tetraacetic acid (DAPTA) as a suitable ionophore has been prepared and studied. The electrode shows a good selectivity for Eu(III) ion with respect to most common cations including alkali, alkaline earth, transition and heavy metal ions. This electrode has a wide linear dynamic range from 1.0×10-6to 1.0×10-2M with a Nernstian slope of 19.7±0.5 mV per decade and a low detection limit of 7.2×10-7M in the pH range of 2.5–9.1, while the response time was rapid (<10 s). The practical utility of the electrodes has been demonstratedby their use as indicator electrodes in the potentiometric titration of Eu3+ions with EDTA and for the determination of Eu3+in some water sample solutions.

Thiophene-based Schiff base ligand as ionophore for Ni(II)-selective polyvinyl chloride membrane electrode

2020 ◽  
Vol 40 (6) ◽  
pp. 481-485 ◽  
Author(s):  
Shankar Suman ◽  
Ram Singh
Keyword(s):  
Schiff Base ◽  
Polyvinyl Chloride ◽  
Ethylenediaminetetraacetic Acid ◽  
Pvc Membrane ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Nonaqueous Media ◽  
Pvc Membrane Electrode ◽  
Ph Range ◽  
Polyvinyl Chloride Membrane

AbstractA synthesized Schiff base 2-acetylthiophene semicarbazone (3) was used for the preparation of Ni2+ selective polyvinyl chloride (PVC) membrane electrode. The prepared electrode with the optimized composition, PVC:3:sodium tetraphenylborate:di-n-butylphthalate as 33:6:3:58 exhibited a Nernstian response over the working range of 5.0 × 10−6–5.0 × 10−2 mol l−1 with a slope of 29.0 ± 0.3 mV/concentration. The electrode showed good selectivity towards Ni2+ with respect to several metal ions in the pH range of 2.5–10.0 in <15 s with a detection limit of 4.7 × 10−6 mol l−1. The electrode showed the additional benefit of working in partially nonaqueous media having up to 15% (v/v) methanol or ethanol. This electrode was also successfully applied in Ni2+ ion potentiometric titration with ethylenediaminetetraacetic acid as an indicator electrode.

scholarly journals Thiocyanate Ion-Selective PVC Membrane Electrode

2010 ◽  
Vol 5 (1) ◽  
pp. 73-77
Author(s):  
Mihail Revenco ◽  
Mariana Martin ◽  
Waell Abu Dayyih
Keyword(s):  
Pvc Membrane ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Thiocyanate Ion ◽  
Pvc Membrane Electrode ◽  
Wide Ph Range ◽  
Nernstian Slope ◽  
Ph Range ◽  
Discriminating Ability ◽  
Selective Sensor

A potentiometric selective sensor based on trinuclear chromium(III) complex as a novel ionophore for the thiocyanateselective electrode is reported. The sensor displays a near Nernstian slope of 57 ± 2 mV per decade, over a wide pH range 3 - 11. The working concentration range of the electrode is 1.10-5 – 1.10-1 mol/l with a detection limit of 5.10-6 mol/l. The sensor has a response time of 20 s and can be used for at least 6 months without any considerable fluctuation of the potential. The selectivity coefficients determined at using the fixed interference method indicate a good discriminating ability towards other anions. The prepared sensor was applied as an indicator electrode in the titration of thiocyanate with Ag+.

scholarly journals Mg(II) Selective PVC Membrane Electrode Based on Methyl Phenyl Semicarbazone as an Ionophore

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Sulekh Chandra ◽  
Kusum Sharma ◽  
Adarsh Kumar
Keyword(s):  
High Sensitivity ◽  
Fast Response ◽  
Pvc Membrane ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Trivalent Cation ◽  
Selective Electrode ◽  
Pvc Membrane Electrode ◽  
Ph Range ◽  
Methyl Phenyl

A PVC-membrane-based Mg(II) selective electrode was constructed using methyl phenyl semicarbazone (MPS) as a neutral carrier. The sensor exhibits a Nernstian response for Mg(II) ion over a wide concentration range1.0×10-8  to  1.0×10-1 M with the slope of 28.4 mV/per decade having detection limit1.7×10-9 M. It was relatively a fast response time (<10 s for concentration≥1.0×10-3and<15 s for concentration of≥1.0×10-6 M) and can be used for 8 months without any considerable divergence in potentials. The proposed sensor revealed relatively good selectivity and high sensitivity for Mg(II) over a mono-, di-, and trivalent cation and can be used in a pH range of 1.0–9.5. It was also successfully used as an indicator electrode in potentiometer titration and in the analysis of concentration of magnesium in various real samples.

Zn(II)-selective poly (vinyl chloride) (PVC) membrane electrode based on Schiff base ligand 2-benzoylpyridine semicarbazone as an ionophore

2020 ◽  
Vol 40 (10) ◽  
pp. 842-847
Author(s):  
Shankar Suman ◽  
Ram Singh
Keyword(s):  
Schiff Base ◽  
Detection Limit ◽  
Vinyl Chloride ◽  
Pvc Membrane ◽  
Membrane Electrode ◽  
Sodium Tetraphenylborate ◽  
Potential Response ◽  
Selective Electrode ◽  
Poly Vinyl Chloride ◽  
Pvc Membrane Electrode

AbstractA new poly (vinyl chloride) (PVC) membrane electrode using 2-benzoylpyridine semicarbazone as membrane carrier with dioctylphthalate as plasticizer and sodium tetraphenylborate (NaTBP) as anion excluder has been fabricated and investigated as Zn(II)-selective electrode. Best potential response is observed for the composition PVC 30%, plasticizer 58%, NaTBP 8% and ionophore 4% (w/w). The sensor showed a linear stable response over a concentration range of 1.0 × 10−2–4.56 × 10−6 M with a detection limit of 2.28 × 10−6 M and a response time <10 s. The electrode can be used for at least six months without any divergence in potential.

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