Dynamic Analysis of Ion-Selective Electrode Response for Mapping Soil Properties On-the-Go

2004 ◽  
Author(s):  
Balaji Sethuramasamyraja ◽  
Viacheslav I Adamchuk ◽  
Mark T Morgan
Keyword(s):  
Dynamic Analysis ◽  
Soil Properties ◽  
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.

<i>Ammonium Ion Selective Electrode Response in Swine Urine Solutions</i>

2018 ◽  
Author(s):  
Alison V. Deviney ◽  
John J. Classen ◽  
J. Mark Rice ◽  
Dean L. Hesterberg
Keyword(s):  
Ion Selective Electrode ◽  
Ammonium Ion ◽  
Selective Electrode ◽  
Electrode Response ◽  
Swine Urine
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