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Analytical Letters Volume 6, 1973 - Issue 9
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ELECTROCHEMISTRY

Analysis of Urea Nitrogen in the Presence of Ammonia Using an Ammonia Gas Sensitive Electrode

Darius S. Rogers Department of Chemistry, Washington State University, Pullman, Washington, 99163
&
Karl H. Pool Department of Chemistry, Washington State University, Pullman, Washington, 99163
Pages 801-808 | Received 14 Aug 1973, Accepted 15 Aug 1973, Published online: 05 Dec 2006
 
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Abstract

This report describes a method for the determination of ammonia and urea in raw sewage samples using an Orion Ammonia Gas-Sensing Electrode. Urea is determined by potentiometrically measuring the ammonia produced following exhaustive hydrolysis by urease and subtracting the amount of ammonia present before enzymatic hydrolysis. The recovery of urea from raw sewage samples using the procedure herein described is shown to be nearly Quantitative.

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