The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Vinod Kumar Gupta - One of the best experts on this subject based on the ideXlab platform.
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a novel gadolinium ion selective membrane Electrode based on 2 4 phenyl 1 3 thiazol 2 yliminomethyl phenol
Electrochimica Acta, 2013Co-Authors: Ashok Kumar Singh, Vinod Kumar Gupta, Lokesh Kumar KumawatAbstract:Abstract A new gadolinium(III) selective Electrode has been developed from poly vinyl chloride (PVC) matrix membrane which is based on synthesized neutral carrier [L1] 2-(2-aminothiazol-4-yl)phenol and [L2] 2-(4-phenyl-1,3-thiazol-2-yliminomethyl)phenol as ionophores. The membrane having a composition of ionophore (L2):PVC:plasticizer (acetophenone):additive (sodium tetraphenylborate) in the ratio of 5:33:60:2 exhibited calibration performance over a wide range of concentration of gadolinium (9.38 × 10−7 to 1.0 × 10−2 M) and exhibited a Nernst slope of 19.5 ± 0.5 mV per decade of Gd(III) activity. It exhibited a quick response time of 8 s and its potential response was independent of pH across the pH range of 3.5–8.5. The membrane can be used with a good reproducibility over a period of 3 months. Membrane sensor was used as a Indicator Electrode for determination of end point in potentiometric titration of Gd (III) ion with EDTA. The proposed membrane Electrodes were successfully applied for the determination of the concentration of gadolinium (III) ion in a mineral sample.
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ni2 selective sensors based on meso tetrakis 4 tris 4 allyl dimethylsilyl phenyl silyl phenyl porphyrin and sal 2trien in poly vinyl chloride matrix
Talanta, 2007Co-Authors: Vinod Kumar Gupta, Ajay K Jain, Zakariyya Ishtaiwi, Heinrich Lang, Gaurav MaheshwariAbstract:Abstract PVC-based membranes of meso-tetrakis-{4-[tris-(4-allyl dimethylsilyl-phenyl)-silyl]-phenyl}porphyrin (I) and (sal)2trien (II) as electroactive material with dioctylphthalate (DOP), tri-n-butylphosphate (TBP), chloronapthalene (CN), dibutylphthalate (DBP) and dibutyl(butyl) phosphonate (DBBP) as plasticising solvent mediators have been found to act as Ni2+ selective sensor. The best performance was obtained with the sensor having a membrane of composition of I: sodium tetraphenyl borate: PVC in the ratio 5:5:150. The sensor exhibits Nernstian response in the activity range 2.5 × 10−6 to 1.0 × 10−1 M, performs satisfactorily over wide pH range (2–5.5) with a fast response time (∼8 s). The sensor was found to work satisfactorily in partially non-aqueous media up to 20% (v/v) content of methanol or ethanol and acetone and could be used over a period of 4 months. Potentiometric selectivity coefficients determined by matched potential method (MPM) indicate excellent selectivity for Ni2+ ions. The sensors could be used successfully in the estimation of nickel in different brand of chocolates and also as an Indicator Electrode in potentiometric titration.
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a cobalt ii selective pvc membrane based on a schiff base complex of n n bis salicylidene 3 4 diaminotoluene
Analytica Chimica Acta, 2006Co-Authors: Vinod Kumar Gupta, Ashok Kumar Singh, Sameena Mehtab, Barkha GuptaAbstract:Abstract A new PVC membrane Electrode for Co 2+ based on N,N ′-bis(salicylidene)-3,4-diaminotoluene, an excellent neutral carrier, has been fabricated using sodium tetraphenylborate (NaTPB) as an anionic excluder and dioctylphthalte (DOP) as a solvent mediator. The Electrode exhibits a linear potential response in the concentration range of 7.9 × 10 −8 to 1.0 × 10 −1 M with a slope of 30 ± 0.2 mV per decade. The detection limit of the proposed sensor is 5.0 × 10 −8 M and it can be used over a period of 5 months. The proposed sensor revealed good selectivity over a wide variety of other cations including alkali, alkaline earth, heavy and transition metals and could be used in the pH range of 2.0–9.0. This Electrode was successfully applied for the determination of Co 2+ in real samples and as an Indicator Electrode in potentiometric titration of cobalt ions.
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chemical sensor for lanthanum iii determination using aza crown as ionophore in poly vinyl chloride matrix
Analytica Chimica Acta, 2003Co-Authors: Vinod Kumar Gupta, Suresh Jain, Sudeshna ChandraAbstract:Lanthanum(III)-selective sensors have been fabricated from poly(vinyl chloride) (PVC) matrix membranes containing neutral carrier, monoaza-12-crown-4 as ionophore. Best performance was exhibited by the membrane having a composition crown:PVC:NaTPB:DBBP in the ratio 7:48:8:37 (w/w). This membrane works well over a wide concentration range of 3.16×10−5 to 1.00×10−1 M of La3+ with a Nernstian slope of 20.5±1.0 mV per decade of La3+ activity. The response time of the sensor is <15 s and the membrane can be used over a period of 5 months with good reproducibility. The proposed Electrode can be used in a wide pH range from 3.0 to 7.0 and demonstrates good discriminating power over a number of monovalent, divalent, and trivalent cations. This can be used in non-aqueous medium having up to 25% (v/v) non-aqueous content. The sensor has been used successfully as an Indicator Electrode in the potentiometric titration of lanthanum(III) ions against EDTA and for the determination of La3+ in binary mixtures.
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preparation of ethambutol copper ii complex and fabrication of pvc based membrane potentiometric sensor for copper
Talanta, 2003Co-Authors: Vinod Kumar Gupta, Rajendra Prasad, Azad KumarAbstract:Abstract Copper(II) complex of ethambutol (I) was prepared and used in the fabrication of Cu2+ selective ISE membrane. The membrane having Cu(II)–ethambutol complex (I) as electroactive material, along with sodium tetraphenylborate (NaTPB) as anion discriminator, dioctylphthalate (DOP) as plasticizer in poly(vinyl chloride) (PVC) matrix in the percentage ratio 6:2:190:200 (I:NaTPB:DOP:PVC) (w/w) gave a linear response in the concentration range 7.94×10−6 to 1.0×10−1 M of Cu2+ with a slope of 29.9±0.2 mV per decade of activity and a fast response time of 11±2 s. The sensor works well in the pH range 2.1–6.3 and could be satisfactorily used in presence of 40% (v/v) methanol, ethanol and acetone and is selective for copper over a large number of cations with slight interference from Na+ and Co2+ if present at a level ⩾1.5×10−5 and 6.5×10−5 M, respectively. It works well over a period of 6 months and can also be used as Indicator Electrode for the end point determination in the potentiometric titration of Cu2+ against EDTA as well as in the determination of Cu2+ in real samples.
Mojtaba Shamsipur - One of the best experts on this subject based on the ideXlab platform.
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novel gadolinium poly vinyl chloride membrane sensor based on a new s n schiff s base
Analytica Chimica Acta, 2003Co-Authors: Mohammad Reza Ganjali, Mojtaba Shamsipur, Masoud Salavatiniasari, Mahdi Emami, Morteza Rezapour, Bozorgmehr Maddah, Morteza Hosseini, Zahra TalebpouiAbstract:Abstract In this work, a novel gadolinium membrane sensor based on new S–N Schiff,s base (2-[{3-[(2-sulfanylphenyl)imino)-1-methylbutylidene}amino]phenyl hydrosulfide (SMPH) is presented. The sensor displays a linear dynamic range between 1.0×10−1 and 1.0×10−5 M, with a nice Nernstian slope of 19.8±0.3 mV per decade and a detection limit of 3.0×10−6 M. The best performance was obtained with a membrane composition of 33% poly(vinyl chloride), 61% benzyl acetate, 2% sodium tetraphenyl borate and 5% SMPH. The potentiometric response of the sensor is independent of the pH of the solution in the pH range of 4.0–8.0. The sensor possesses the advantages of short conditioning time, very fast response time, and especially, very good selectivity towards a large number of cations, such as Sm(III), Ce(III), La(III), Cu(II), Pb(II) and Hg(II). The Electrode can be used for at least 9 weeks without any considerable divergence in the potentials. It was used as an Indicator Electrode in potentiometric titration of Gd(III) ions with EDTA, and recovery of Gd(III) from various binary mixtures. The Electrode was also applied to the determination of Gd(III) in a urine sample.
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a novel pvc membrane coated graphite sensor based on an anthraquinone derivative membrane for the determination of lead
Electroanalysis, 2003Co-Authors: Siavash Riahi, Mojtaba Shamsipur, M F Mousavi, Hashem SharghiAbstract:A highly selective membrane Electrode for the determination of ultratrace amounts of lead was prepared. The PVC membrane Electrode based on 2-(2-ethanoloxymethyl)-1-hydroxy-9,10-anthraquinone (AQ), directly coated on graphite, exhibits a good Nernstian response for Pb(II) ions over a very wide concentration range (1.0×10−7–1.0×10−2 M) with a limit of detection of 8.0×10−8 M. It has a fast response time of ca. 10 s and can be used over a period 2 months with good reproducibility (SD=±0.2 mV). The Electrode revealed a very good selectivity respect to common alkali, alkaline earth, transition and heavy metal ions and could be used in the pH range of 3.5–6.8. It was used as an Indicator Electrode in potentiometric titration of lead ions with chromate and oxalate, and in indirect determination of lead in spring water samples.
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determination of scn in urine and saliva of smokers and non smokers by scn selective polymeric membrane containing a nickel ii azamacrocycle complex coated on a graphite Electrode
Analytical Sciences, 2002Co-Authors: Mohammad Reza Ganjali, Tahereh Poursaberi, Leila Hajiaghababaei, Mohammad Yousefi, Mehran Javanbakht, Masoud Salavatiniasari, Elnaz Latifi, Mojtaba ShamsipurAbstract:The construction, performance characteristics, and application of a novel polymeric membrane coated on a graphite Electrode with unique selectivity towards SCN- are reported. The Electrode was prepared by incorporating Ni(II)-2,2,4,9,9,11- hexamethyltetraazacyclotetradecanediene perchlorate into a plasticized poly(vinyl chloride) membrane. The influences of membrane composition, pH and foreign ions were investigated. The Electrode displays a near Nernstian slope (-57.8 mV decade-1) over a wide concentration range of 1 × 10-7 - 1 × 10-1 M of SCN- ion. The Electrode has a detection limit of 4.8 × 10-8 M (2.8 ng/cm3) SCN- and shows response times of about 15 s and 120 s for low to high and high to low concentration sequences, respectively. The proposed sensor shows high selectivity towards SCN- over several common organic and inorganic anions. The Electrode revealed a great enhancement in selectivity coefficients and detection limit for SCN-, in comparison with the previously reported Electrodes. It was successfully applied to the direct determination of SCN- in milk and biological samples, and as an Indicator Electrode in titration of Ag+ ions with thiocyanate.
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the synthesis of a new thiophene derivative schiff s base and its use in preparation of copper ion selective Electrodes
Electroanalysis, 2001Co-Authors: Tahereh Poursaberi, Shohreh Rouhani, Mojtaba Shamsipur, Abolghasem Moghimi, Leila Hajiaghababaei, Mohammad Yousefi, Maryam Kargarrazi, Hossein Aghabozorg, Mohammad Reza GanjaliAbstract:A highly selective and sensitive PVC-membrane Electrode for Cu(II) ion was developed by using a new thiophene-derivative Schiff’s base. The Electrode exhibits a Nernstian slope of 29.3 � 0.7 mV per decade at 25 � C over a very wide concentration range (1.0610 � 1 – 6.0610 � 8 M) with a detection limit of 2.0610 � 8 M (1.28 ng/mL). The ion selectivity of this Electrode for Cu 2þ was greater than 3.0610 3 times over various metal ions. It was successfully applied to the determination of trace amounts of copper in Iranian black tea, and as Indicator Electrode, in potentiometric titration of copper ion.
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highly selective and sensitive copper ii membrane coated graphite Electrode based on a recently synthesized schiff s base
Analytica Chimica Acta, 2001Co-Authors: Mohammad Reza Ganjali, Abolghasem Moghimi, Tahereh Poursaberi, Mohammad Yousefi, Maryam Kargarrazi, Hossein Aghabozorg, Leila Hajiagha Babaei, Shohre Rouhani, Mojtaba ShamsipurAbstract:A PVC membrane Electrode based on bis-2-thiophenal propanediamine (TPDA) coated directly on graphite is described. The Electrode exhibits a Nernstian response for Cu 2+ over a very wide concentration range (1.0 × 10 −1 to 6.0 × 10 −8 M) with a detection limit of 3.0 × 10 −8 M (2.56 ng ml −1 ). It has a fast response time and can be used for at least 2 months without any major deviation. The proposed sensor revealed very good selectivities for Cu 2+ over a wide variety of other metal ions and could be used in the pH range of 3.0–7.0. It was successfully used for direct determination of copper in black tea and as an Indicator Electrode in potentiometric titration of copper ion. © 2001 Elsevier Science B.V. All rights reserved.
Mohammad Reza Ganjali - One of the best experts on this subject based on the ideXlab platform.
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determination of terbium iii ions in phosphate rock samples by a tb3 pvc membrane sensor based on n n dimethyl n n bis 4 methoxyphenyl phosphoramidate
Materials Science and Engineering: C, 2008Co-Authors: Hassan Ali Zamani, Mohammad Reza Ganjali, Parviz Norouzi, Azadeh Tadjarodi, Encyeh ShahsavaniAbstract:Abstract A poly (vinyl chloride)-based membrane of N, N-Dimethyl-N′, N″-bis(4-methoxyphenyl)phosphoramidate (DMP) as a neutral carrier was prepared and investigated as a Tb3+-selective Electrode. This Electrode constructed with sodium tetraphenylborate (NaTPB) as the anion excluder and 2-nitrophenyl octyl ether (NPOE) as the plasticizer. Its performance was found to be the following: a Nernstian slope of 19.7 ± 0.4 mV per decade across a broad range (1.0 × 10− 6 to 1.0 × 10− 1 M); a detection limit of 8.0 × 10− 7 M between the pH values of 3.5 and 8.0; additionally, the response time was about 10 s; usage of more than 2 months without any potential divergence; good Tb3+ selectivity over a wide variety of other metal ions. The membrane sensor was applied to the Tb3+ recovery from different water samples, determination of fluoride ions in mouth wash samples and the determination of Tb3+ in phosphate rock samples. It was also used as an Indicator Electrode in the potentiometric titration of Tb3+ ions with EDTA.
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novel pr iii selective membrane sensor based on a new hydrazide derivative
Sensors and Actuators B-chemical, 2006Co-Authors: Mohammad Reza Ganjali, Fatemeh S Mirnaghi, Parviz Norouzi, Mehdi AdibAbstract:Abstract A novel Pr(III)-selective membrane sensor based on N ′-(pyridin-2-ylmethylene)benzohydrazide (PBA) was prepared. The plasticized membrane sensor on N ′-(pyridin-2-ylmethylene)benzohydrazide exhibits a Nernstian response for Pr(III) ions over a relatively wide concentration range (1.0 × 10 −2 to 1.0 × 10 −6 M) with a limit of detection of 8.0 × 10 −7 M (∼115 ppb). It has a fast response time of ∼20 s and can be used for at least 6 weeks without observing any major deviation. The sensor revealed very good selectivity with respect to common alkali, alkaline earth, and especially lanthanide metal ions (cerium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutertium). The response of the proposed sensor is independent on pH in the range 3.5–8. It was used as an Indicator Electrode in potentiometric titration of Pr(III) ions and indirect determination of Pr(III) in water samples.
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fluoride determination in some mouth wash preparations by a novel la iii graphite coated membrane sensor based on amitraz
Analytica Chimica Acta, 2005Co-Authors: Mohammad Reza Ganjali, Parviz Norouzi, Vahideh Akbar, Maryam Ghorbani, Abbas AhmadiAbstract:Solution studies on the binding properties of N-2,4-dimethylphenyl-N′-ethylformamidine (amitraz) toward nine lanthanide ions including lanthanum, cerium, neodium, samarium, europium, gadolinium, terbium, dysprosium, ytterbium and some other transition and heavy metal ions such as copper, lead, cobalt, nickel ions, showed a selective 1:1 complexation between amitraz and lanthanum ions. Consequently, amitraz was applied as an ion carrier in construction of a novel poly(vinyl chloride) membrane sensor for La(III). The sensor has a linear dynamic range of 1.0 × 10−1 to 1.0 × 10−7 M with a Nernstian slope of 19.8 ± 0.2 mV per decade and a detection limit of 8.0 × 10−8 M. The proposed sensor displays a fast response time (<8 s), and can be used for at least 2 months without any considerable divergences in the potentials. The La(III) membrane sensor revealed comparatively good selectivity with respect to most of cations including alkaline, alkaline earth, and some transition and heavy metal ions. It could be used in a pH range of 3.0–9.0. The proposed membrane Electrode was used as an Indicator Electrode in the potentiometric titration of La(III) ions with an EDTA solution, and also in the determination of fluoride concentration in some mouth wash preparations.
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a novel sulfate polymeric membrane sensor based on a new bis pyrylium derivative
Electroanalysis, 2004Co-Authors: Mohammad Reza Ganjali, Simindokht Shirvaniarani, Parviz Nourozi, Davood Salimzadeh, Madjid Faalrastegar, Abolghasem MoghimiAbstract:A novel ion-selective polymeric membrane sensor based on pyrylium-4,4-(1,4-phenylen) bis[2,6-bis(2-naphthyl)]-bis[tetrafluoroborate] (PBGNB) as an excellent sensing material is successfully developed. The Electrode possesses the advantages of a very low detection limit (5.0×10−8 M), a wide working concentration range (1.0×10−8−1.0×10−1 M) and specially, a high sulfate selectivity over most common organic and inorganic anions. The sensor displays Nernstian behavior (slope of 29.5±0.5 mV per decade) in a wide pH range (3.0–8.5). It shows a short response time in the whole concentration range (ca. 10 s). The Electrode was used as an Indicator Electrode in the potentiometric titration of sulfate ions with barium ions. The proposed sensor was successfully applied to the direct determination of salbutamol sulfate and paromomycin sulfate.
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novel gadolinium poly vinyl chloride membrane sensor based on a new s n schiff s base
Analytica Chimica Acta, 2003Co-Authors: Mohammad Reza Ganjali, Mojtaba Shamsipur, Masoud Salavatiniasari, Mahdi Emami, Morteza Rezapour, Bozorgmehr Maddah, Morteza Hosseini, Zahra TalebpouiAbstract:Abstract In this work, a novel gadolinium membrane sensor based on new S–N Schiff,s base (2-[{3-[(2-sulfanylphenyl)imino)-1-methylbutylidene}amino]phenyl hydrosulfide (SMPH) is presented. The sensor displays a linear dynamic range between 1.0×10−1 and 1.0×10−5 M, with a nice Nernstian slope of 19.8±0.3 mV per decade and a detection limit of 3.0×10−6 M. The best performance was obtained with a membrane composition of 33% poly(vinyl chloride), 61% benzyl acetate, 2% sodium tetraphenyl borate and 5% SMPH. The potentiometric response of the sensor is independent of the pH of the solution in the pH range of 4.0–8.0. The sensor possesses the advantages of short conditioning time, very fast response time, and especially, very good selectivity towards a large number of cations, such as Sm(III), Ce(III), La(III), Cu(II), Pb(II) and Hg(II). The Electrode can be used for at least 9 weeks without any considerable divergence in the potentials. It was used as an Indicator Electrode in potentiometric titration of Gd(III) ions with EDTA, and recovery of Gd(III) from various binary mixtures. The Electrode was also applied to the determination of Gd(III) in a urine sample.
Nasser Abu Ghalwa - One of the best experts on this subject based on the ideXlab platform.
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potentiometric titration of rm nh _ 4 rm vo _ 3 and rm na _ 2 rm haso _ 4 in molten rm nano _ 3 at 623 k using a novel solid state glass rm nb _ 2 rm o _ 5 ph Indicator Electrode
IEEE Sensors Journal, 2014Co-Authors: Nasser Abu GhalwaAbstract:A solid state glass/ Nb2O5 Electrode was prepared by the sol-gel process using the sonocatalytic method. The film reported here was prepared from an NbCl5 as precursor and butanol as solvent. The relation between log [O2-] and glass/ Nb2O5 Electrode potential in molten KNO3 at 623 K is linear with a slope of 59.1 mV at 623 K. This value is closer to the theoretical value 2.303 RT/F (61.6 mV at 623 K). The standard potential of this Electrode, E0, is computed as -984.7 mV relative to the Ag/Ag reference. The Electrode was investigated as an oxide ion Indicator Electrode in potentiometric titrations between acids and bases in fused salts. This Electrode behaves reversibly and responds to the oxide ion concentration in molten nitrate. Two oxide ion acceptors (acids), NH4VO3 and Na2HAsO4, were titrated with oxide ion donors (bases) in fused KNO3 at 625 K. The Electrode was found to serve as an excellent Indicator for acid base potentiometric titrations in molten salts.
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development of a novel solid state sensor Electrode based on titanium thin film as an Indicator Electrode in potentiometric and conductometric acid base titration in aqueous solution
Journal of Sensors, 2012Co-Authors: Nasser Abu GhalwaAbstract:A modified Ti/(SnO2 + Sb2O3) Electrode was prepared by thermal deposition on titanium substrate and its use as Indicator Electrode to potentiometric and conductometric acid-base titration in aqueous solution at 298 K was developed. The E-pH curve is linear with slope of 0.0512 V/dec at 298 K. The standard potential of this Electrode,
, was determined with respect to the SCE as reference Electrode. The recovery percentages for potentiometric and conductometric acid-base titration for acetic acid against NaOH were calculated. The cell constant, specific conductance, and the molar conductance with dilution for some common electrolytes were measured. -
using of ti co3o4 pbo2 sno2 sb2o3 modified Electrode as Indicator Electrode in potentiometric and conductometric titration in aqueous solution
Journal of Electroanalytical Chemistry, 2012Co-Authors: Nasser Abu Ghalwa, Hazem M Abushawish, Mazen Hamada, Mohammed Al Askalany, Ashraf Abu Swareh, Tagreed SiamAbstract:A modified Ti/Co3O4/PbO2/(SnO2 + Sb2O3) Electrode was prepared by thermal deposition of Pb, Sn, Sb and their alloys in titanium substrate and its use as Indicator Electrode in potentiometric and conductometric acid-base titration in aqueous solution at 298 K was studied. The E–pH curve is linear with slope of 0.0545 V/dec at 298 K which is close to the theoretical value 2.303 RT/F (0.059 V at 298 K). The standard potential of this Electrode, E0, is computed with respect to the SCE as reference Electrode. The recovery percentages for potentiometric and conductometric acid-base titration are calculated. The cell constant for this conductometric cell was determined. The specific conductance for standard KCl was determined and compared with that of glass conductive cell. The variation of molar conductance with dilution for some common electrolytes was tested as well as the molar conductance at infinite dilution of some common electrolytes is determined by the conductive cell and conductive glass cell. The prepared modified Electrode was used in potentiometric and conductometric titrations for acetic acid against NaOH as titrant in aqueous medium at 298 K.
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a novel sensor as Indicator Electrode in potentiometric and conductometric acid base titrations in aqueous solution
Analytical chemistry an Indian journal, 2011Co-Authors: Nasser Abu Ghalwa, Mazen Hamada, Mohammed Al Askalany, Tagreed SiamAbstract:This work deals with the preparation of Ti/Co3O4/(SnO2+Sb2O3) modified Electrode by thermal deposition of alloy Sn and Sb in titaniumsubstrate and its use as Indicator Electrode in potentiometric and conductometric acidbase titration in aqueous solution at 298.15 K. The E-pH curves are linear with slopes of (0.0503) at 298.15 K. This value is close to the theoretical value 2.303RT/2F (0.059 V at 298.15 K). The standard potential of these Electrodes, E0, are computed with respect to the SCE as reference Electrode. The recovery percentage for potentiometric and conductometric acid-base titration is calculated. The cell constant for pair Electrode was determined. The specific conductance for standard KCl was determined and compared with that of glass conductive Electrode. The variation of molar conductance with dilution for some common electrolytes was tested. Also the molar conductance at infinite dilution of some common electrolytes is determined by each conductive cell and conductive glass Electrode. Three acids: acetic, propanoic and phosphoric acids were potentiometrically titrated with NaOH as titrants where acetic, hydrochloric and a mixture of acetic and hydrochloric acids was conductometrically titrated with NaOH as titrants in aqueous medium at 298.15 K using the prepared Electrode.
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potentiometric titration of na2haso4 napo3 na4p2o7 and their binary mixtures in nano3 melt at 350 c using a novel solid state glass tio2 as ph Indicator Electrode
Journal of Dispersion Science and Technology, 2007Co-Authors: Issa El M Nahhal, Nasser Abu GhalwaAbstract:A solid‐state glass/TiO2 Electrode was fabricated using a transparent conductive titanium oxide film on a glass substrate. The coating of the glass substrate was achieved by a novel simple chemical vapor deposition (CVD) procedure. This Electrode can be used as an Indicator Electrode in potentiometric acid‐base titration. This Electrode behaves reversibly and responds to the oxide ion concentration in molten NaNO3 · Na2HAsO4, NaPO3, Na4P2O7, and their binary mixtures were potentiometrically titrated with Na2O2 as titrants in molten NaNO3 at 350°C, using the above mentioned Indicator Electrode.
Anish Khan - One of the best experts on this subject based on the ideXlab platform.
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preparation of poly 2 methylaniline v iii tungstate nanofiber and its application as Indicator Electrode by diffusion phenomenon
Solid State Ionics, 2017Co-Authors: Anish Khan, Aftab Aslam Parwaz Khan, Abdullah M Asiri, Hadi M MarwaniAbstract:Abstract Currently, polymer-inorganic composites became inspiration for the design of advanced synthetic materials. Exfoliation/intercalation method was used for the preparation of poly(2-methylaniline)V(III) tungstate nanofiber (POT-VOWO 4 ) composite. The poly(2-methylaniline) into V(III) tungstate was mixed by different volume ratios. A characterization of composite was carried out by XPS, SEM, XRD, FTIR and simultaneous TGA studies. This composite was employed as sensor element in the preparation of ion selective membrane Electrode in electrometric titrations by diffusion mechanism. By experiment, it was found that Electrode had linear range (1.0 × 10 − 1 M to 6.0 × 10 − 6 M), good Nernstian response of 30.4 mV/decade change of Hg 2 + concentration with working pH range of 3.0–8.0 having short response time of 20s. This Electrode was used as Indicator Electrode for real samples analysis.
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an advanced nano composite cation exchanger polypyrrole zirconium titanium phosphate as a th iv selective potentiometric sensor preparation characterization and its analytical application
Journal of Materials Science, 2010Co-Authors: Asif Ali Khan, Leena Paquiza, Anish KhanAbstract:Polypyrrole has emerged as one of the highly pursued conducting polymers owing to its high electrical conductivity and good environmental stability. In spite of its excellent electrical properties, the chemical and thermal stability and processability are not very satisfactory. The incorporation of a polymer material into an inorganic ion-exchanger provides a high class of hybrid ion-exchangers with enhanced ion-exchange properties, high reproducibility, high stability, and good selectivity for heavy metals. A novel organic–inorganic composite-polypyrrole zirconium titanium phosphate has been synthesized using zirconium titanium phosphate, which is an advanced inorganic ion-exchange material with the qualities listed above. The physicochemical properties of this composite material are characterized by X-ray, TGA–DTA, AAS, FTIR, SEM, and TEM. The ion-exchange capacity, pH titrations, elution, and chemical stability were determined to study ion-exchange properties of the material. Distribution studies for various metal ions revealed that the nano-composite is highly selective for Th(IV). An ion-selective membrane Electrode was fabricated using this material for the determination of Th(IV) ions in solutions. The analytical utility of this Electrode was established by employing it as an Indicator Electrode in electrometric titrations.
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preparation and characterization of a new organic inorganic nano composite poly o toluidine th iv phosphate its analytical applications as cation exchanger and in making ion selective Electrode
Talanta, 2007Co-Authors: Asif Ali Khan, Anish KhanAbstract:An organic–inorganic hybrid poly-o-toluidine Th(IV) phosphate was chemically synthesized by mixing ortho-tolidine into the gel of Th(IV) phosphate in different mixing volume ratios, concentration of inorganic reactant with a fixed mixing volume ratios of organic polymer. The physico-chemical characterization was carried out by elemental analysis, TEM, SEM, XRD, FTIR and simultaneous TGA–DTA studies. The ion-exchange capacity, chemical stability, effect of eluant concentration, elution behavior and pH titration studies were also carried out to understand the ion-exchange capabilities. The distribution studies revealed that the cation-exchange material is highly selective for Hg2+, which is an important environmental pollutant. Due to selective nature of the cation-exchanger ion-selective membrane Electrode was fabricated for the determination of Hg(II) ions in solutions. The analytical utility of this Electrode was established by employing it as an Indicator Electrode in electrometric titrations.