scholarly journals Synthesis and Characterization of Organic-Inorganic Nanocomposite Poly-o-anisidine Sn(IV) Arsenophosphate: Its Analytical Applications as Pb(II) Ion-Selective Membrane Electrode

2009 ◽  
Vol 2009 ◽  
pp. 1-10 ◽  
Author(s):  
Asif Ali Khan ◽  
Umme Habiba ◽  
Anish Khan
Keyword(s):  
Environmental Pollutant ◽  
Exchange Capacity ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Mixed Solution ◽  
Electroactive Material ◽  
Wide Ph Range ◽  
Selective Membrane ◽  
Distribution Studies ◽  
Ph Range

Poly-o-anisidine Sn(IV) arsenophosphate is a newly synthesized nanocomposite material and has been characterized on the basis of its chemical composition, ion exchange capacity, TGA-DTA, FTIR, X-RAY, SEM, and TEM studies. On the basis of distribution studies, the exchanger was found to be highly selective for lead that is an environmental pollutant. For the detection of lead in water a heterogeneous precipitate based ion-selective membrane electrode was developed by means of this composite cation exchanger as electroactive material. The membrane electrode is mechanically stable, with a quick response time, and can be operated over a wide pH range. The selectivity coefficients were determined by mixed solution method and revealed that the electrode is sensitive for Pb(II) in presence of interfering cations. The practical utility of this membrane electrode has been established by employing it as an indicator electrode in the potentiometric titration of Pb(II).

scholarly journals Synthesis of a New Calix[4]Arene and Its Application in Construction of a Highly Selective Silver Ion-Selective Membrane Electrode

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Saeed Taghvaei-Ganjali ◽  
Reza Zadmard ◽  
Masoumeh Zeyaei ◽  
Kabeh Rahnama ◽  
Farnoush Faridbod ◽  
...  
Keyword(s):  
Response Time ◽  
Potentiometric Titration ◽  
Fast Response ◽  
Pvc Membrane ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Membrane Sensor ◽  
Selective Membrane ◽  
Ph Range ◽  
Pvc Membrane Sensor

A PVC membrane sensor for Ag (I) ions has been prepared. The membrane has 5, 11, 17, 23-tetra-tert-butyl-25-(3-N, N-diethyldithio carbamoylpropoxy)-26,27,28-tris-propoxy calix[4]arene (CAD) as a carrier. It was found that the sensor exhibits a Nernstian response for Ag+ ions over a wide concentration range (10−2–10−6 M). Additionally, it illustrates a fast response time (about 5 seconds), and it can be used for at least 2 months without any considerable divergence in potentials. The nature of the plasticizer, the additive, the concentration of internal solutions in the electrodes, and the composition of the membrane were investigated. Furthermore, the suggested membrane electrode revealed good selectivities for Ag+ over a variety of other metal cations, and it could be used in the pH range of 3.0–7.0. Eventually, it was successfully applied as an indicator electrode for the potentiometric titration of Ag+ ion with NaCl.

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 Cerium(III)-Selective Membrane Electrode Based on Dibenzo-24-crown-8 as a Neutral Carrier

2010 ◽  
Vol 7 (3) ◽  
pp. 849-855 ◽  
Author(s):  
Susheel K. Mittal ◽  
S. K. Ashok Kumar ◽  
Harish K. Sharma
Keyword(s):  
Aqueous Media ◽  
Earth Metal ◽  
Oxalic Acid Solution ◽  
Solution Concentration ◽  
Ion Concentration ◽  
Indicator Electrode ◽  
Average Lifetime ◽  
Membrane Electrode ◽  
Electroactive Material ◽  
Selective Membrane

Cerium(III)-selective membrane electrodes have been prepared using dibenzo-24-crown-8 (DB24C8) as an electroactive material. A membrane having a composition: DB24C8 (4.5%), plasticizer (NPOE, 62.5%) and PVC (33%) gives the best performance. It works well over a wide Ce(III) ion-concentration range of 1x10-5M to 1x10-1M with a Nernstian slope of 19.0 mV/decade and a detection limit of 3x10-5M. It has a fast response time of 20 seconds and has an average lifetime of four months. The internal solution concentration does not have a significant effect on the response of the electrode except for a change in intercept of the calibration curves. The working pH range for Ce(III) solutions (1x10-2M and 1x10-3M) is 3.5-8.0. The proposed sensor shows a good selectivity for cerium(III) with respect to alkali, alkaline earth, some transition and rare earth metal ions that are normally present along with cerium in its ores. The proposed sensor was investigated in partially non-aqueous media using acetone, methanol and DMSO mixtures with water. The electrode was further used as an indicator electrode for the potentiometric titration of Ce(III) solution against oxalic acid solution.

scholarly journals Ion-exchange studies on poly-o-anisidine Sn(IV) phosphate nano composite and its application as Cd(II) ion-selective membrane electrode

2010 ◽  
Vol 8 (2) ◽  
pp. 396-408 ◽  
Author(s):  
Asif Khan ◽  
Anish Khan
Keyword(s):  
Ion Exchange ◽  
Fast Response ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Physical Parameters ◽  
Self Diffusion ◽  
Separation Of Metal Ions ◽  
Selective Membrane ◽  
Entropy Of Activation ◽  
Distribution Studies

AbstractAn organic-inorganic composite, poly-o-anisidine Sn(IV) phosphate, was chemically synthesized by mixing ortho-anisidine into gels of Sn(IV) phosphate with different mixing volume ratios. Studies on the effect of eluant concentration, elution behavior and separation of metal ions were carried out to understand the ion-exchange capabilities. Due to Cd(II) selective nature of composite, revealed by distribution studies, Cd(II) ion selective membrane electrode was fabricated. The analytical utility of the electrode was established by employing it as an indicator electrode in electrometric titrations having fast response time, 3–5s, and long life span of six months. Some physical parameters like self-diffusion coefficient (D0), activation energy (Ea) and entropy of activation (ΔS0) have been evaluated under conditions favoring a particle diffusion-controlled mechanism by studying ion-exchange kinetics.

Synthesis of Kraton/polyaniline ionomer composite membrane as Cu (II) ion selective membrane electrode

2020 ◽  
Vol 16 ◽  
Author(s):  
Mohd Imran Ahamed ◽  
Nimra Shakeel ◽  
Naushad Anwar ◽  
Lutfullah ◽  
Anish Khan
Keyword(s):  
Ion Exchange ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Electrical Conductance ◽  
Exchange Capacity ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Ion Exchange Capacity ◽  
Minimum Concentration ◽  
Selective Membrane

: In this work, we demonstrate the synthesis of Kraton ionomer membrane by solution casting method. Kraton ionomer membrane was coated with polyaniline by in situ oxidative chemical polymerization to get electrical conductance in the membrane. The synthesized composite membrane of Kraton/polyaniline ionomer further characterized by electrochemical studies to check the redox properties of the material. Similarly, the ion exchange capacity and proton conductivity and selectivity of the synthesized membrane was also determined. From the selectivity studies which shows that the membrane was selective for Cu (II) ions. Furthermore, the outcomes of the membrane such as high ion exchange capacity, good proton conductivity, and efficient selectivity, displays the synthesized membrane is efficient for the preparation of ion-selective membrane electrode. The minimum concentration range of Cu (II) ions towards the ion-selective membrane was 1 × 10-1 to 1 × 10-8 M. The electrode revealed a Nernstian slope of 28.15 mV/decade change in concentration of Cu (II) ions. In addition, the electrode exposed fast response time of 10s, working pH range of 3-6.5, detection limit of 1 × 10-9 M and appreciably good selectivity towards Cu (II) ions over alkali, alkaline, and other heavy metal ions. Moreover, it can be employed as indicator electrode for the potentiometric titration of Cu (II) ions by using ethylene diamine tetraacetic acid, disodium salt (EDTA).

A polyvinylchloride-based cadmium ion-selective electrode using [Mo2(OAc)2(H2-calix[4]arene)] as an electroactive material

2010 ◽  
Vol 62 (11) ◽  
pp. 2510-2518 ◽  
Author(s):  
Sonika Tyagi ◽  
Himanshu Agarwal ◽  
Saiqa Ikram
Keyword(s):  
Ethylenediaminetetraacetic Acid ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Electroactive Material ◽  
Direct Potentiometry ◽  
Electrode Sensor ◽  
Sodium Tetraphenyl Borate ◽  
Nernstian Slope ◽  
Tetraphenyl Borate ◽  
Ph Range

A highly electroactive material Mo2[(OAc)2(H2-calix[4]arene)] is used as a neutral carrier for Cd2 +  ions in this paper. The membrane is fabricated by using ionophore [Mo2(OAc)2(H2-calix[4]arene)]:poly(vinyl chloride) (PVC): dibutylphthalate(DBP):sodium tetraphenyl borate (NaTPB) in the ratio of 40:300:470:5 respectively and tetrahydrofuran (THF) used as a solvent. The membrane electrode performed in the concentration range of 9.9 × 10−8–1.0 × 10−1 M (2.34 × 10−5–23.64 mg/mL) having the Nernstian slope of 30.0±1.0 mV and the best detection limit was observed at 9.8 × 10−8 M (2.31 × 10−5 mg/mL). The proposed membrane electrode has the response time of 12 s and a useful working pH range of 1.0–7.0, and used over a period of 10 months and work satisfactorily in the test solution having 30% (v/v) non-aqueous content. Electrode sensor has distinguishable ability for Cd2 +  ion with regard to several alkali, alkaline earth, transition and heavy metal ions. It was used in direct potentiometry as an indicator electrode, in the potentiometric titration of 10−3 M Cd2 +  solution against 10−2 M of ethylenediaminetetraacetic acid (EDTA).

Novel palladium(II) selective membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol

2010 ◽  
Vol 75 (5) ◽  
pp. 563-575 ◽  
Author(s):  
Moslem Mohammadi ◽  
Mehdi Khodadadian ◽  
Mohammad K. Rofouei
Keyword(s):  
Limit Of Detection ◽  
Membrane Electrode ◽  
Aqueous Samples ◽  
Selective Determination ◽  
Poly Vinyl Chloride ◽  
Selective Membrane ◽  
Ph Range ◽  
Palladium Content ◽  
Methyl Benzene

A plasticized poly(vinyl chloride) membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol (L) for highly selective determination of palladium(II) (in PdCl42– form) is developed. The electrode showed a good Nernstian response (29.6 ± 0.4 mV per decade) over a wide concentration range (3.1 × 10–7 to 1.0 × 10–2 mol l–1). The limit of detection was 1.5 × 10–7 mol l–1. The electrode has a response time of about 20 s, and it can be used for at least 2 months without observing any considerable deviation from Nernstian response. The proposed electrode could be used in the pH range of 2.5–5.5. The practical utility of the electrode has been demonstrated by its use for the estimation of palladium content in aqueous samples.

scholarly journals Beryllium-Ion-Selective PEDOT Solid Contact Electrode Based on 9,10-Dinitrobenzo-9-Crown-3-Ether

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6375
Author(s):  
Junghwan Kim ◽  
Dae Hee Kim ◽  
Jin Cheol Yang ◽  
Jae Sang Kim ◽  
Ji Ha Lee ◽  
...  
Keyword(s):  
Electrochemical Impedance ◽  
Constant Current ◽  
Solid Contact ◽  
Response Characteristics ◽  
Best Response ◽  
Wide Ph Range ◽  
Selective Membrane ◽  
Nernstian Slope ◽  
Ph Range ◽  
Contact Electrode

A beryllium(II)-ion-selective poly(ethylenedioxythiophene) (PEDOT) solid contact electrode comprising 9,10-dinitrobenzo-9-crown-3-ether was successfully developed. The all-solid-state contact electrode, with an oxygen-containing cation-sensing membrane combined with an electropolymerized PEDOT layer, exhibited the best response characteristics. The performance of the constructed electrode was evaluated and optimized using potentiometry, conductance measurements, constant-current chronopotentiometry, and electrochemical impedance spectroscopy (EIS). Under optimized conditions, which were found for an ion-selective membrane (ISM) composition of 3% ionophore, 30% polyvinylchloride (PVC), 64% o-nitro phenyl octyl ether (o-NPOE), and 3% sodium tetraphenylborate (NaTPB), the fabricated electrode exhibited a good performance over a wide concentration range (10−2.5–10−7.0 M) and a wide pH range of 2.0–9.0, with a Nernstian slope of 29.5 mV/D for the beryllium (II) ion and a detection limit as low as 10−7.0 M. The developed electrode shows good selectivity for the beryllium(II) ion over alkali, alkaline earth, transition, and heavy metal ions.

scholarly journals Ion-Selective Electrode for Anionic Surfactants Using Hexadecyl Trimethyl Ammonium Bromide-Sodium Dodecylsulfate as an Active Ionophore

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Junwei Wang ◽  
Zhiping Du ◽  
Wanxu Wang ◽  
Wei Xue
Keyword(s):  
Limit Of Detection ◽  
Sodium Dodecylsulfate ◽  
Poor Response ◽  
Pvc Membrane ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Ammonium Bromide ◽  
Hexadecyl Trimethyl Ammonium Bromide ◽  
Pvc Membrane Electrode ◽  
Wide Ph Range

The construction and characteristic performance of PVC membrane electrode responsive to sodium dodecylsulfate (SDS) are described in this paper. The electrode is based on hexadecyl trimethyl ammonium bromide-Sodium dodecylsulfate (CTA+DS−) ion pair as ionophore in PVC membrane, which displays a Nernstian slope of −58 ± 0.9 mV/decade in a 5.0 × 10−6to 2.5 × 10−3 mol L−1concentration range and a limit of detection of 2.9 × 10−6 mol L−1. The electrode can be used for 3 months without showing significant changes in the value of slope or working range. Also the electrode has wide pH range of application and short response time. The electrode shows a selective response to SDS and a poor response to common inorganic anions. The selective sequence found was SDS > HCO3 −> CH3COO−> Cl−> I−> NO3 −≈Br−> F−> CO3 2−> C6H5O7 3−> C2O4 2−> SO4 2−> C4H4O6 2−> SO3 2−> PO4 3−. The potentiometric selectivity coefficients determined are indicating that common anions would not interfere in the SDS determination. The electrode has been utilized as an end point indicator electrode for potentiometric titration involving hyamine as titrant.

Potentiometric determination of mercury ions by sol-gel synthesized multi-walled carbon nanotubes Zr (IV) phosphate composite fabricated membrane electrode

2020 ◽  
Vol 16 ◽  
Author(s):  
Tauseef Ahmad Rangreez ◽  
Rizwana Mobin ◽  
Hamida Tun Nisa Chisti
Keyword(s):  
Carbon Nanotubes ◽  
Cation Exchanger ◽  
Sol Gel ◽  
Exchange Capacity ◽  
Membrane Electrode ◽  
Ion Exchange Capacity ◽  
Selective Membrane ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Exchange Properties

Background: The nanocomposites are formed by introducing inorganic nano-clusters, fullerenes, clays, metals, oxides with numerous organic polymers. The assembly of these materials exhibits better properties such as catalytic, thermal stability and adsorption properties, etc. than the individual materials. Objective: The nanocomposite synthesized here by sol-gel method was primarily evaluated for cation exchange properties viz, elution concentration, elution behavior, effect of temperature on ion-exchange capacity. The synthesized composite was used as an electro-active component for fabrication of Hg2+ ion selective membrane electrode. Method : The sol-gel technique was used to synthesize multi-walled carbon nanotubes Zr(IV) phosphate composite cation exchanger. By the technique of solution casting the material as an electroactive part was used for the fabrication of mercury ion-selective membrane electrode. The potential response of the electrode was also investigated as a function of membrane composition and plasticizer. Results: The composite cation exchanger exhibited 1.8 meq g-1 ion-exchange capacity (IEC). It retained almost 65 % of its initial IEC upto a temperature of 400 °C. Distribution studies showed the selective nature of the composite for Hg(II) ions. The ion-selective membrane electrode exhibited typical Nernstian response towards Hg2+ ions in the concentration range 1×10-1 -1×10-7 M. Conclusion: The results discussed reveal that a new cation composite exchanger-multi-walled carbon nanotubes Zr (IV) phosphate exhibited excellent cation exchange properties and was found to be preferentially selective towards the Hg2+ ions. It was also used as an indicator electrode in the titration of Hg2+ using ethylenediaminetetraacetic acid as a titrant.

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