Single and mixed chemically modified carbon paste ion-selective electrodes for determination of ketotifen fumarate

2011 ◽  
Vol 5 (2) ◽  
pp. 74-80 ◽  
Author(s):  
M. M. Khater ◽  
Y. M. Issa ◽  
S. H. Mohamed
Keyword(s):  
Ion Selective Electrodes ◽  
Carbon Paste ◽  
Chemically Modified ◽  
Ketotifen Fumarate

Multi-walled carbon nanotube and nanosilica chemically modified carbon paste electrodes for the determination of mercury(ii) in polluted water samples

2015 ◽  
Vol 7 (15) ◽  
pp. 6280-6289 ◽  
Author(s):  
Tamer Awad Ali ◽  
Gehad G. Mohamed
Keyword(s):  
Carbon Nanotube ◽  
Ion Concentration ◽  
Polluted Water ◽  
Ion Selective Electrodes ◽  
Carbon Paste ◽  
Chemically Modified ◽  
Carbon Paste Electrodes ◽  
Multi Walled Carbon Nanotube ◽  
Modified Carbon Paste Electrodes

Novel carbon paste ion selective electrodes based on the 1,4-bis(6-bromohexyloxy)benzene (BHOB) ionophore were constructed in order to determine the Hg(ii) ion concentration.

scholarly journals Determination of Thallium(I) by Hybrid Mesoporous Silica (SBA-15) Modified Electrode

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Geeta Rani ◽  
Sanjay Singh
Keyword(s):  
Mesoporous Silica ◽  
Potential Method ◽  
Selectivity Coefficient ◽  
Indicator Electrode ◽  
Carbon Paste ◽  
Chemically Modified ◽  
Best Response ◽  
Edta Solution ◽  
Paste Electrode

Chemically modified mesoporous silica material (SBA-15) was used for the construction of Tl(I) selective carbon paste electrode. The best response was found with the electrode containing 10% modifier as electrode material. The electrode has a lower detection limit of 6.0 × 10−9 M in a working concentration range of 1.0 × 10−8–1.0 × 10−1 M. The selectivity coefficient calculated by match potential method (MPM) shows the high selectivity of electrode towards Tl(I) over other tested ions. The electrode was successfully applied as an indicator electrode for the titration of 0.01 M TlNO3solution with standards EDTA solution and for sequential titration of mixture of different anions.

Determination of Tryptophan Using Nanocomposite-Based Sensor

2013 ◽  
Vol 829 ◽  
pp. 675-680 ◽  
Author(s):  
Akbar Islamnezhad ◽  
Esmaeil Farzaneh Jobaneh
Keyword(s):  
Catalytic Effect ◽  
Basic Solution ◽  
Carbon Paste ◽  
Experimental Conditions ◽  
Chemically Modified ◽  
Solvent Free Condition ◽  
Analytical Response ◽  
Paste Electrode ◽  
Effect Of The Composition

In this study, the nanoComposite Silica Perchloric Acid Poly (2-Methyl Aniline) (NSPPMA) was synthesized under the solvent-free condition and used as modifier in preparation of chemically modified electrode (CME). The effect of the composition of carbon paste electrode on its voltammograms were evaluated in basic solution with 5.0 × 105 M Trp. It was found that addition of NSPPMA to the carbon paste would generate the peak current of Trp because of its catalytic effect on redox process. The best analytical response was obtained at pH 12.0. The anodic peak currents were proportional to Trp concentrations in the range of 2.5 × 109 5.0 × 10-4 M under the optimized experimental conditions. The detection limit was 1.7 × 10-10 M. The correlation of the peak currents against v1/2 (v is the scan rate) is linear. The proposed method was applied to the determination of Trp in pharmaceuticals formulations successfully.

scholarly journals Chemically Modified Carbon Paste Sensor Based on N1,N2-Bis(salicylidine)butane-1,4-diamine for Determination of Nd(III)

2017 ◽  
Vol 29 (6) ◽  
pp. 1296-1300 ◽  
Author(s):  
Beena Saraswathyamma ◽  
Krishnapillai Girish Kumar ◽  
Shyama ◽  
Athira V. Sagar ◽  
S. Amritha ◽  
...  
Keyword(s):  
Carbon Paste ◽  
Chemically Modified

scholarly journals Potentiometric Determination of Ketotifen Fumarate in Pharmaceutical Preparations and Urine Using Carbon Paste and PVC Membrane Selective Electrodes

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Eman Y. Z. Frag ◽  
Gehad G. Mohamed ◽  
Mohamed M. Khalil ◽  
Mohammad M. A. Hwehy
Keyword(s):  
Biological Fluid ◽  
Pharmaceutical Preparations ◽  
Standard Addition ◽  
Selectivity Coefficient ◽  
Potentiometric Determination ◽  
Pvc Membrane ◽  
Membrane Electrodes ◽  
Carbon Paste ◽  
Ketotifen Fumarate

This study compares between unmodified carbon paste (CPE; the paste has no ion pair) and polyvinyl chloride (PVC) membrane selective electrodes that were used in potentiometric determination of ketotifen fumarate (KTF), where sodium tetraphenylborate (NaTPB) was used as titrant. The performance characteristics of these sensors were evaluated according to IUPAC recommendations which reveal a fast, stable, and linear response for KTF over the concentration range of 10−7to 10−2 mol L−1. The electrodes show Nernstian slope value of and  mV decade−1for CPE and PVC membrane electrodes at 30∘C, respectively. The potential is nearly stable over the pH range 3.0–6.0 and 2.0–7.0 for CPE and PVC membrane electrodes, respectively. Selectivity coefficient values towards different inorganic cations, sugars, and amino acids reflect high selectivity of the prepared electrodes. The electrodes responses at different temperatures were also studied, and long operational lifetime of 12 and 5 weeks for CPE and PVC membrane electrodes, respectively, were found. These are used for determination of ketotifen fumarate using potentiometric titration, calibration, and standard addition methods in pure samples, its pharmaceutical preparations (Zaditen tablets), and biological fluid (urine). The direct potentiometric determination of KTF using the proposed sensors gave recoveries % of and with RSD 1.42 and 0.63% for CPE and PVC membrane selective electrodes, respectively. Validation of the method shows suitability of the proposed sensors for use in quality control assessment of KTF. The obtained results were in a good agreement with those obtained using the reported spectrophotometric method.

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