Influence of ion exchanger and diluent structure on uranyl ion selective electrode response

1980 ◽  
Vol 52 (13) ◽  
pp. 2105-2108 ◽  
Author(s):  
Ilia. Goldberg ◽  
Dan. Meyerstein
Keyword(s):  
Uranyl Ion ◽  
Ion Exchanger ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Electrode Response

Reagentless determination of L-asparagine and L-arginine via the combined use of immobilized enzymes and an ion-selective electrode

1976 ◽  
Vol 54 (1) ◽  
pp. 62-65 ◽  
Author(s):  
That Tjien Ngo
Keyword(s):  
Immobilized Enzymes ◽  
Ion Selective Electrode ◽  
Ammonium Ion ◽  
Selective Electrode ◽  
New Methods ◽  
Potentiometric Response ◽  
Electrode Response ◽  
Combined Use ◽  
Hydrolysis Of

New methods for the determination of L-asparagine and arginine are described. Solutions containing L-asparagine were pumped through an asparaginase tube, which catalyzed the hydrolysis of L-asparagine to L-aspartic acid and ammonium ion. For L-arginine determination, solutions containing L-arginine were pumped through an arginase–urease tube. This dual enzyme tube catalyzed the conversion of L-arginine to L-ornithine, carbon dioxide, and ammonium ion. The ammonium ion concentrations in the effluent of the enzyme tubes were determined quantitatively by an ammonium-ion-selective electrode. The potentiometric response of the electrode was directly proportional to the logarithm of the concentration of L-asparagine and L-arginine in the range of 0.1–50 mM. An equation relating the electrode response and the substrate concentration is derived.

Selective ion-exchanger behaviour of neutral carrier ion-selective electrode membranes

Talanta ◽  
1989 ◽  
Vol 36 (3) ◽  
pp. 403-405 ◽  
Author(s):  
G. Horvai ◽  
V. Horváth ◽  
A. Farkas ◽  
E. Pungor
Keyword(s):  
Ion Exchanger ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Neutral Carrier
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