Time-Dependent Phenomena in the Potential Response of Ion-Selective Electrodes Treated by the Nernst−Planck−Poisson Model. Part 2: Transmembrane Processes and Detection Limit

2009 ◽  
Vol 81 (12) ◽  
pp. 5016-5022 ◽  
Author(s):  
Tomasz Sokalski ◽  
Witold Kucza ◽  
Marek Danielewski ◽  
Andrzej Lewenstam
Keyword(s):  
Detection Limit ◽  
Poisson Model ◽  
Time Dependent ◽  
Ion Selective Electrodes ◽  
Potential Response

Time-Dependent Phenomena in the Potential Response of Ion-selective Electrodes Treated by the Nernst−Planck−Poisson Model. 1. Intramembrane Processes and Selectivity

2006 ◽  
Vol 78 (19) ◽  
pp. 6783-6791 ◽  
Author(s):  
Peter Lingenfelter ◽  
Iwona Bedlechowicz-Sliwakowska ◽  
Tomasz Sokalski ◽  
Magdalena Maj-Zurawska ◽  
Andrzej Lewenstam
Keyword(s):  
Poisson Model ◽  
Time Dependent ◽  
Ion Selective Electrodes ◽  
Potential Response

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.

scholarly journals Potentiometric Carboxylate Sensors Based on Carbazole-Derived Acyclic and Macrocyclic Ionophores

Chemosensors ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 4
Author(s):  
Ville Yrjänä ◽  
Indrek Saar ◽  
Mihkel Ilisson ◽  
Sandip A. Kadam ◽  
Ivo Leito ◽  
...  
Keyword(s):  
Detection Limit ◽  
Vinyl Chloride ◽  
Anion Exchanger ◽  
Linear Range ◽  
Ph Sensitivity ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Response Characteristics ◽  
Potentiometric Response ◽  
Poly Vinyl Chloride

Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit, selectivity, and pH sensitivity) of sensors prepared with different membrane compositions (ionophore, ionophore concentration, anion exchanger concentration, and plasticizer) were evaluated. The results show that for the macrocyclic ionophores, a larger cavity provided better selectivity. The sensors exhibited modest selectivity for acetate but good selectivity for benzoate. The carbazole-derived ionophores effectively decreased the interference from lipophilic anions, such as bromide, nitrate, iodide, and thiocyanate. The selectivity, detection limit, and linear range were improved by choosing a suitable plasticizer and by reducing the ionophore and anion exchanger concentrations. The influence of the electrode body’s material upon the composition of the plasticized poly(vinyl chloride) membrane, and thus also upon the sensor characteristics, was also studied. The choice of materials for the electrode body significantly affected the characteristics of the sensors.

Neutral-Carrier Ion-Selective Electrodes Assessed by the Nernst–Planck–Poisson Model

2015 ◽  
Vol 87 (17) ◽  
pp. 8665-8672 ◽  
Author(s):  
Jerzy J. Jasielec ◽  
Tomasz Sokalski ◽  
Robert Filipek ◽  
Andrzej Lewenstam
Keyword(s):  
Poisson Model ◽  
Ion Selective Electrodes ◽  
Neutral Carrier

scholarly journals Validation of a Novel Potentiometric Method Based on a Polymeric PVC Membrane Sensor Integrated with Tailored Receptors for the Antileukemia Drug Cytarabine

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1343 ◽  
Author(s):  
Ayman H. Kamel ◽  
Abd El-Galil E. Amr ◽  
Nashwa H. Ashmawy ◽  
Hoda R. Galal ◽  
Abdulrahman A. Almehizia ◽  
...  
Keyword(s):  
Detection Limit ◽  
Biological Fluid ◽  
Pharmaceutical Formulations ◽  
Assay Method ◽  
Pvc Membrane ◽  
Therapeutic Drug ◽  
Ion Selective Electrodes ◽  
Easy Method ◽  
Potentiometric Response ◽  
Sensory Element

A simple, rapid and easy method is proposed for the detection of a cytostatic therapeutic drug, cytarabine, in real samples. The method is based on potentiometric transduction using prepared and characterized new ion-selective electrodes for cytarabine. The electrodes were integrated with novel man-tailored imprinted polymers and used as a sensory element for recognition. The electrodes revealed a remarkable potentiometric response for cytarabine over the linearity range 1.0 × 10−6–1.0 × 10−3 M at pH 2.8–4 with a detection limit of 5.5 × 10−7 M. The potentiometric response was near-Nernstian, with average slopes of 52.3 ± 1.2 mV/decade. The effect of lipophilic salts and plasticizer types on the potentiometric response was also examined. The electrodes exhibited an enhanced selectivity towards cytarabine over various foreign common ions. Validation and verification of the presented assay method are demonstrated by evaluating the method ruggedness and calculating the detection limit, range of linearity, accuracy (trueness), precision, repeatability (within-day) and reproducibility (between-days). The proposed ion-selective electrodes revealed good performance characteristics and possible application of these electrodes for cytarabine monitoring in different matrices. The electrodes are successfully applied to cytarabine determination in spiked biological fluid samples and in pharmaceutical formulations.

Exchange current determination and time-dependent effects for model liquid membrane ion-selective electrodes

1984 ◽  
Vol 29 (8) ◽  
pp. 1127-1131 ◽  
Author(s):  
R.D. Armstrong ◽  
A.K. Covington ◽  
G.P. Evans ◽  
T. Handyside
Keyword(s):  
Liquid Membrane ◽  
Exchange Current ◽  
Time Dependent ◽  
Ion Selective Electrodes ◽  
Model Liquid

GLOBAL EXISTENCE AND ASYMPTOTIC BEHAVIOR FOR A SEMICONDUCTOR DRIFT-DIFFUSION-POISSON MODEL

2008 ◽  
Vol 18 (03) ◽  
pp. 443-487 ◽  
Author(s):  
HAO WU ◽  
PETER A. MARKOWICH ◽  
SONGMU ZHENG
Keyword(s):  
Global Existence ◽  
Existence And Uniqueness ◽  
Poisson Model ◽  
Stationary Problem ◽  
Time Dependent ◽  
Unique Equilibrium ◽  
Poisson System ◽  
Drift Diffusion ◽  
Global Existence And Uniqueness ◽  
Time Dependent Problem

In this paper a time-dependent as well as a stationary drift-diffusion-Poisson system for semiconductors are studied. Global existence and uniqueness of weak solution of the time-dependent problem are proven and we also prove the existence and uniqueness of the steady state. It is shown that as time tends to infinity, the solution of the time-dependent problem will converge to a unique equilibrium. Due to the presence of recombination-generation rate R in our drift-diffusion-Poisson model, the work of this paper in some sense extends the results in the previous literature (on both time-dependent problem and stationary problem).

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