scholarly journals PREPARATION AND CHARACTERIZATION ION SELECTIVE ELECTRODE Cd(II) BASED ON CHITOSAN IN PVC MEMBRANE

2011 ◽  
Vol 11 (3) ◽  
pp. 285-289 ◽  
Author(s):  
A. Sentosa Panggabean
Keyword(s):  
Life Time ◽  
Optimum Concentration ◽  
Ion Selective Electrode ◽  
Pvc Membrane ◽  
Selective Electrode ◽  
Membrane Conductivity ◽  
Ft Ir ◽  
Ph Range ◽  
Hydroxy Groups

Preparation of the chitosan membrane of ion-selective electrode for determination of cadmium ion has been conducted. Chitosan is a natural polymer containing nitrogen could coordinate with Cd2+ to increase the membrane conductivity value. Chitosan is a principal material and mixed with polyvinylchloride (PVC) as matrix dissolved previously to solvent tetrahydrofuran (THF) and dioctylphenylphosphonate (DOPP) is added as plasticizer by proportion chitosan:PVC:DOPP (6:3:1). To obtain the dopant optimum concentration, membrane was dipped in Cd2+ for 7 days and its conductivity value was measured using the four-point probe method. From FT-IR spectrum the peaks of amine, acetylamide and hydroxy groups wavelength number was observed to assure that Cd2+ bound to the chitosan. The optimum concentration of Cd2+ dopant was obtained at 1.00 M with conductivity value of 549.45 ohm-1m-1 wich gave a Nernstian factor of 32.03 mV/decade with the detection limit of 2.512 x 10-5 M. The electrodes work in the pH range 3 - 7. The life time of the electrode was 8 weeks. The ions of Ni2+, Fe3+, Pb2+, Cu2+, Zn2+, Cl- and SO42- toward concentration range 10-3 M gave response did not interfere in the determine of Cd2+ ion.

ION-SELECTIVE ELECTRODE DETERMINATION OF SOLUTION K IN SOIL SUSPENSIONS AND ITS SIGNIFICANCE IN KINETIC STUDIES

1990 ◽  
Vol 70 (3) ◽  
pp. 411-424 ◽  
Author(s):  
F. L. WANG ◽  
P. M. HUANG
Keyword(s):  
Ionic Strength ◽  
Response Time ◽  
Soil Particle ◽  
Ion Selective Electrode ◽  
Pvc Membrane ◽  
Calibration System ◽  
Selective Electrode ◽  
Soil Particles ◽  
K Concentration

The feasibility of using a K ion-selective electrode (K-ISE) to monitor changes in solution K concentration in soil suspensions with time, under shaking conditions, was investigated and its significance in kinetics studies of K adsorption was discussed. Factors that affect the efficiency of the K-ISE method include the response time of the electrode, influence of suspended soil particles, shaking speed, and ionic strength of the system. The response time of the K-ISE decreased with increasing K concentration. Moreover, for a system with a solution K concentration greater than 10 mg K L−1, errors resulting from response delays were negligible when, under shaking conditions, observation time intervals were greater than 30 s. The influence of suspended soil particles on the K-ISE method was negligible for soil suspensions with a solution/soil ratio of 50:1 (vol/wt). Shaking significantly influenced K-ISE determination of solution K concentration. The degree of the influence of shaking on the determination of solution K appeared to be related to ionic factors of the systems. Shaking had much less influence on the soil suspensions, the filtrates and mixed CaCl2-KCl solutions than on pure KCl solutions. Satisfactory results were obtained by taking into account the response time, suspended soil particle and shaking speed factors and by adjusting the ionic strength of the calibration system (KCl standard solution series). Key words: Potassium ion-selective PVC membrane electrode, batch technique, kinetics, calibration system, electrode response time, suspended soil particle, shaking speed, ionic strength

Determination of Erbium Ions in Water Samples by a PVC Membrane Erbium-Ion Selective Electrode

2010 ◽  
Vol 8 (2) ◽  
pp. 303-307 ◽  
Author(s):  
Hassan Ali Zamani ◽  
Majid Mohammadhosseini ◽  
Mehdi Nekoei ◽  
Mohammad Reza Ganjali
Keyword(s):  
Water Samples ◽  
Ion Selective Electrode ◽  
Pvc Membrane ◽  
Selective Electrode ◽  
Erbium Ions ◽  
Erbium Ion

scholarly journals Determination of Iron (II) in some drugs as Vitamins based on Ion-Selective Electrode

2018 ◽  
Vol 6 (6) ◽  
Author(s):  
Sabah M. Moltazem ◽  
Ragda R. Mohammed ◽  
Reem M. Allqarni
Keyword(s):  
Atomic Absorption ◽  
Lower Limit ◽  
Limit Of Detection ◽  
Active Material ◽  
Ion Selective Electrode ◽  
Iron Ion ◽  
Selective Electrode ◽  
Organic Species ◽  
Ph Range

The present work describes a sensor is composed of incorporated Rofenac D as an electro active material in PVC matrix membrane and dioctylphthalate or dioctylesepacate as solvent mediators. The sensor exhibited fast and stable near Nernstian cationic response of 29.1 ±0.5 mV Concentration decade of iron (II) in the concentration range of 1.0× 10-7-1.0× 10-2 M. The lower limit of detection was 1.5 × 10-7 ± 0.2. It is to be noted that the sensor based on Rofinac D was used throughout this investigation in the pH range 3- 8.5. The sensor displayed a good selectivity for iron ion respect to a number of common foreign inorganic and organic species spatially some drugs which contains iron. The results obtained with this procedure were compared with those from atomic absorption and spectrophotometry.

A Novel Potentiometric PVC-membrane Cysteamine-Selective Electrode Based on Cysteamine-Phosphomolybdate Ion-Pair

2020 ◽  
Vol 16 (2) ◽  
pp. 168-175 ◽  
Author(s):  
Merve Tumur ◽  
Gulsah Saydan Kanberoglu ◽  
Fatih Coldur
Keyword(s):  
Analytical Methods ◽  
Pharmaceutical Preparations ◽  
Life Time ◽  
Ion Pair ◽  
Pharmaceutical Formulation ◽  
Pvc Membrane ◽  
Selective Electrode ◽  
Potentiometric Response ◽  
Drug Quality Control

Background: Cysteamine is used as an orphan drug in the treatment of cystinosis to prevent long-term cystine accumulation in lysosomes. Dosing in cysteamine treatment is extremely important and overdose may cause some side effects. Up to now, various analytical methods have been used for cysteamine determination. Many of these methods require sophisticated instruments, expert operators, time-consuming measurement procedures and manipulation steps, expensive supplies and long analysis time. Aims and Objective: The present study deals with the development of a potentiometric PVC-membrane cysteamine-selective electrode based on an ion-pair of cysteamine and its application in a pharmaceutical formulation. Methods: Cysteamine (Cys)-Phosphomolybdate (PM) ion-pair was synthesized by mixing the equal volumes of 10-2 M Cysteamine HCl and sodium phosphomolybdate aqueous solutions. The obtained precipitate was used as ionophore in the structure of PVC-membrane. Results and Discussion: The electrode exhibited a linear response in the concentration range of 1.0×10- 1-1.0×10-5 M cysteamine with a slope of 51,7 mV per decade and detection limit of 1.0×10-5 M. The potentiometric response of the electrode was very rapid (5 s), adequately repeatable, stable and selective. pH working range and life-time of the electrode were also determined as 3.0-7.0 and 25 days, respectively. Conclusion: A PVC-membrane cysteamine selective electrode was easily prepared. Cysteamine determination in a pharmaceutical formulation was performed. Analysis results indicated that it can be successfully used in drug quality control laboratories for routine analysis of cysteamine in pharmaceutical preparations alternative to more sophisticated, expensive and time-consuming analytical methods.

Titration of sulphates and lead using lead ion selective electrode

1981 ◽  
Vol 46 (2) ◽  
pp. 368-376 ◽  
Author(s):  
Josef Veselý
Keyword(s):  
Ionic Strength ◽  
Electrode Surface ◽  
Salt Content ◽  
Ion Selective Electrode ◽  
Lead Ion ◽  
Selective Electrode ◽  
Limit Of Determination ◽  
Total Salt Content ◽  
Automatic Titration

Titration of sulphates with lead perchlorate employing lead ion selective electrode indication was studied using additions of various organic solvents at different pH' and ionic strength values. As the optimum emerged systems with 60-70% 1,4-dioxane, pH' 5.3-5.6. After dehydration with sodium hydroxide, dioxane must be freed from the electrode surface-oxidizing impurities by their reduction with sodium metal and subsequent distillation. The method was applied to determination of sulphates in mountain spring waters. Units of ppm can be determined; the limit of determination, however, depends considerably on the content of dioxane, total salt content in the sample, and speed of the semi-automatic titration. Lead can be determined with EDTA in concentrations down to c(Pb2+) = 5 . 10-6 mol l-1.

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