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Title: Simplified procedure for forming polymer-based ion-selective electrodes

Abstract

There are a variety of known approaches to prepare polymer-based ion-selective membranes (ISM) and incorporate these membranes into ion-selective electrodes (ISE). All of these procedures for making membranes require a mixture of the polymer, ion-selective reagent and plasticizer(s), as needed, dissolved in a suitable volatile solvent. The ISM's are then formed by such techniques as casting into a mold and letting the solvent slowly evaporate. An ion-selective electrode can then be made by attaching a piece of the polymer-based membrane to a suitable body or by dip coating the membrane solution onto a porous substrate (2) or onto a wire. A new simplified procedure is presented here for fabricating polymer type ISM's and ISE's. This process is based on the impregnation of a preformed polymeric electrode body or part with the ion-selective reagent(s). This usually eliminates the need for preparing a separate membrane or a polymeric based membrane solution and then attaching it to an electrode body. In the process the desired ion-selective reagent is dissolved in a liquid which is a swelling agent for the polymer. A preformed electrode body or substrate piece (tube, disk, etc.) is soaked in this solution and the swelling agent carries the ion-selective reagentmore » into the matrix of the polymer. After the polymer piece is removed, the swelling agent evaporates and the polymer returns to its original size and shape. However, it now has the ion-selective material distributed throughout its matrix, and it is not an ion-selective membrane. Preliminary results are presented demonstrating that this process can be used to fabricate a variety of ion-selective membranes (pH, potassium, ammonium, and chloride), using several different polymers (silicone rubber, poly(vinyl chloride), urethane, and C-Flex) in a variety of configurations. 4 references, 1 figure, 2 tables.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Medtronic, Energy Technology, Brooklyn Center, MN
OSTI Identifier:
5319960
Resource Type:
Journal Article
Journal Name:
Anal. Chem.; (United States)
Additional Journal Information:
Journal Volume: 57:6
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ION-SELECTIVE ELECTRODES; FABRICATION; MEMBRANES; POLYMERS; EXPERIMENTAL DATA; IMPREGNATION; DATA; ELECTRODES; INFORMATION; NUMERICAL DATA; 400400* - Electrochemistry

Citation Formats

Fogt, E J, Cahalan, P T, Jevne, A, and Schwinghammer, M A. Simplified procedure for forming polymer-based ion-selective electrodes. United States: N. p., 1985. Web. doi:10.1021/ac00283a044.
Fogt, E J, Cahalan, P T, Jevne, A, & Schwinghammer, M A. Simplified procedure for forming polymer-based ion-selective electrodes. United States. doi:10.1021/ac00283a044.
Fogt, E J, Cahalan, P T, Jevne, A, and Schwinghammer, M A. Wed . "Simplified procedure for forming polymer-based ion-selective electrodes". United States. doi:10.1021/ac00283a044.
@article{osti_5319960,
title = {Simplified procedure for forming polymer-based ion-selective electrodes},
author = {Fogt, E J and Cahalan, P T and Jevne, A and Schwinghammer, M A},
abstractNote = {There are a variety of known approaches to prepare polymer-based ion-selective membranes (ISM) and incorporate these membranes into ion-selective electrodes (ISE). All of these procedures for making membranes require a mixture of the polymer, ion-selective reagent and plasticizer(s), as needed, dissolved in a suitable volatile solvent. The ISM's are then formed by such techniques as casting into a mold and letting the solvent slowly evaporate. An ion-selective electrode can then be made by attaching a piece of the polymer-based membrane to a suitable body or by dip coating the membrane solution onto a porous substrate (2) or onto a wire. A new simplified procedure is presented here for fabricating polymer type ISM's and ISE's. This process is based on the impregnation of a preformed polymeric electrode body or part with the ion-selective reagent(s). This usually eliminates the need for preparing a separate membrane or a polymeric based membrane solution and then attaching it to an electrode body. In the process the desired ion-selective reagent is dissolved in a liquid which is a swelling agent for the polymer. A preformed electrode body or substrate piece (tube, disk, etc.) is soaked in this solution and the swelling agent carries the ion-selective reagent into the matrix of the polymer. After the polymer piece is removed, the swelling agent evaporates and the polymer returns to its original size and shape. However, it now has the ion-selective material distributed throughout its matrix, and it is not an ion-selective membrane. Preliminary results are presented demonstrating that this process can be used to fabricate a variety of ion-selective membranes (pH, potassium, ammonium, and chloride), using several different polymers (silicone rubber, poly(vinyl chloride), urethane, and C-Flex) in a variety of configurations. 4 references, 1 figure, 2 tables.},
doi = {10.1021/ac00283a044},
journal = {Anal. Chem.; (United States)},
number = ,
volume = 57:6,
place = {United States},
year = {1985},
month = {5}
}