Response characteristics of ion selective electrodes based on dinonylnaphthalenesulfonic acid

1980 ◽  
Vol 52 (3) ◽  
pp. 562-564 ◽  
Author(s):  
Charles R. Martin ◽  
Henry. Freiser
Keyword(s):  
Ion Selective Electrodes ◽  
Response Characteristics ◽  
Dinonylnaphthalenesulfonic Acid

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.

scholarly journals Potentiometric Response Characteristics of Membrane-BasedCs+-Selective Electrodes Containing Ionophore-Functionalized Polymeric Microspheres

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Shane Peper ◽  
Chad Gonczy
Keyword(s):  
Ethylene Glycol ◽  
Response Characteristic ◽  
Polymeric Membrane ◽  
Ion Selective Electrodes ◽  
Polymeric Microspheres ◽  
Response Characteristics ◽  
Ph Response ◽  
Potentiometric Response ◽  
Response Slope ◽  
Ph Range

Cs+-selective solvent polymeric membrane-based ion-selective electrodes (ISEs) were developed by doping ethylene glycol-functionalized cross-linked polystyrene microspheres (P-EG) into a plasticized poly(vinyl chloride) (PVC) matrix containing sodium tetrakis-(3,5-bis(trifluoromethyl)phenyl) borate (TFPB) as the ion exchanger. A systematic study examining the effects of the membrane plasticizers bis(2-ethylhexyl) sebacate (DOS), 2-nitrophenyl octyl ether (NPOE), and 2-fluorophenyl nitrophenyl ether (FPNPE) on the potentiometric response and selectivity of the corresponding electrodes was performed. Under certain conditions, P-EG-based ion-selective electrodes (ISEs) containing TFPB and plasticized with NPOE exhibited a super-Nernstian response between1×10−3and1×10−4 M Cs+, a response characteristic not observed in analogous membranes plasticized with either DOS or FPNPE. Additionally, the performance of P-EG-based ISEs was compared to electrodes based on two mobile ionophores, a neutral lipophilic ethylene glycol derivative (ethylene glycol monooctadecyl ether (U-EG)) and a charged metallacarborane ionophore, sodium bis(dicarbollyl)cobaltate(III) (CC). In general, P-EG-based electrodes plasticized with FPNPE yielded the best performance, with a linear range from 10-1–10-5 M Cs+, a conventional lower detection limit of8.1×10−6 M Cs+, and a response slope of 57.7 mV/decade. The pH response of P-EG ISEs containing TFPB was evaluated for membranes plasticized with either NPOE or FPNPE. In both cases, the electrodes remained stable throughout the pH range 3–12, with only slight proton interference observed below pH 3.

scholarly journals Coulometric response characteristics of solid contact ion-selective electrodes for divalent cations

2020 ◽  
Vol 24 (11-12) ◽  
pp. 2975-2983 ◽  
Author(s):  
Tingting Han ◽  
Zekra Mousavi ◽  
Ulriika Mattinen ◽  
Johan Bobacka
Keyword(s):  
Electrochemical Impedance ◽  
Divalent Cations ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Response Characteristics ◽  
Plasticized Pvc ◽  
Monovalent Ions ◽  
Slow Transport ◽  
Poly Styrene Sulfonate ◽  
Redox Capacitance

Abstract The chronoamperometric and coulometric response of solid contact ion-selective electrodes (SCISEs) for the detection of divalent cations was investigated in order to provide a more complete description of the mechanism of the recently introduced coulometric transduction method for SCISEs. The coulometric transduction method has earlier been employed only for SCISEs that were selective to monovalent ions. The SCISEs utilized poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(styrene sulfonate) (PSS−) as the solid contact (ion-to-electron transducer). PEDOT(PSS) was electrodeposited on glassy carbon and covered with plasticized PVC-based ion-selective membranes (ISMs) that were selective towards divalent cations (Ca2+, Pb2+). In contrast to earlier studies, the results obtained in this work show that the coulometric response for the Pb2+-SCISE was limited mainly by ion transport in the PEDOT(PSS) layer, which was not the case for the Ca2+-SCISE, nor was it observed earlier for the monovalent ions. The exceptional behavior of the Pb2+-SCISE was explored further by electrochemical impedance spectroscopy, and it was shown that the effective redox capacitance of PEDOT(PSS) was significantly higher for the Pb2+-SCISE than for the Ca2+-SCISE although the polymerization charge of PEDOT(PSS) was the same. The slow transport of Pb2+ in PEDOT(PSS) was tentatively related to complexation between Pb2+ and PEDOT(PSS).

Macrocyclic compound as ionophores in lead(II) ion-selective electrodes with excellent response characteristics

2008 ◽  
Vol 53 (21) ◽  
pp. 3255-3266 ◽  
Author(s):  
MeiRong Huang ◽  
XiaoLi Ma ◽  
XinGui Li
Keyword(s):  
Macrocyclic Compound ◽  
Ion Selective Electrodes ◽  
Excellent Response ◽  
Response Characteristics

Microanalytical techniques with inverted solid state ion-selective electrodes. II. Microliter volumes

1980 ◽  
Vol 52 (5) ◽  
pp. 384-384
Author(s):  
Gerald L. Vogel ◽  
W. E. Brown
Keyword(s):  
Solid State ◽  
Ion Selective Electrodes
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