A method for the automated determination of urea in plasma and urine, using urease and
alkaline phenol, proved to have the advantages of speed and precision when compared …

In this method for serum and urinary urea determination, the same reagent is used without
predilution of urine samples. The method is based on the pH increase resulting from the …

Automated and manual direct methods for the determination of urea in blood or serum are
described. These methods determine urea by the colored product formed when urea, in …

A rapid method for the determination of urea in blood and urine based upon the urea-p-
dimethylaminobenzaldehyde reaction is described. Results of determinations can be …

A method is described for the determination of urea in plasma and urine. The effects of
variations in the experimental conditions are examined and the results of recovery …

Serum urea nitrogen has been measured by a conductivimetric urease assay system, using
an especially designed conductivity apparatus which automatically senses the rate of …

We describe a new kinetic assay for determining urea in serum or urine with use of urease
(EC 3.5. 1.5) and leucine dehydrogenase (EC 1.4. 1.9). The latter enzyme is suitable for the …

Summary o 1. An automated method for the determination of serum urate has been adapted
from a manual carbonate-phosphotungstic acid method. The method has been evaluated by …

375 A method of estimation of uric acid in urine and other body fluids Page 1 SHORT
COMMUNICATIONS 375 electrophoreiic heterogeneity of the complex or a dissociation of the …

Combination of gel-entrapped urease with a pH electrode can be used to measure plasma
urea, provided that the response is related to an auxiliary pH electrode. The response time is …