[PDF][PDF] Liquid chromatographic determination of urea and ammonia in body fluids using a post-column enzymatic reactor

H Jansen, EG Van Der Velde… - … of Chromatography B …, 1986 - academia.edu
The zyxwvutsrqponmlkjihgfedcbaZYXWVUTSR… determination of urea in serum and in
urine is a very important routine test widely used in many clinical laboratories. These …

A coulometric determination of urea nitrogen in blood and urine

GD Christian, EC Knoblock, WC Purdy - Clinical Chemistry, 1965 - academic.oup.com
To determine urea nitrogen, ammonia resulting from urease hydrolysis of urea is titrated with
coulometrically generated hypobromite ion using a direct amperometric end-point detection …

Optimization of p H values to formulate the bireagent kit for serum uric acid assay

Y Huang, Y Chen, X Yang, H Zhao, X Hu… - Biotechnology and …, 2015 - Wiley Online Library
A new formulation of the bireagent kit for serum uric acid assay was developed based on the
effects of pH on enzyme stability. At 4° C, half‐lives of uricases from Bacillus fastidious and …

Simultaneous quantification of urea, uric acid, and creatinine in human urine by liquid chromatography/mass spectrometry

T Sakurai, T Irii, K Iwadate - Legal Medicine, 2022 - Elsevier
In forensic analysis, the identification of urine or human urine among unknown liquids plays
an important role. Urea, uric acid, and creatinine are major organic compounds found in …

Isotope dilution mass spectrometry: definitive methods and reference materials in clinical chemistry.

MG Giovannini, G Pieraccini… - Annali Dell'istituto …, 1991 - europepmc.org
The application of gas chromatography-mass spectrometry (GC-MS) for the quantitative
analysis of endogenous compounds as well as drugs in clinical biochemistry is taken into …

Validation of deuterium and oxygen18 in urine and saliva samples from children using on‐line continuous‐flow isotope ratio mass spectrometry

H Schierbeek, R Rieken, KY Dorst… - … Journal Devoted to …, 2009 - Wiley Online Library
The doubly labelled water method is valuable for measuring energy expenditure in humans.
It usually involves blood or urine sampling, which might be difficult in neonates and children …

A fast and simple headspace gas chromatographic technique for quantitatively analyzing urea in human urine

WQ Xie, KX Yu, YX Gong - Analytical biochemistry, 2019 - Elsevier
A fast and convenient headspace gas chromatographic (HS-GC) approach was described
for the estimation of urea in human urine. The HS-GC could detect the generated carbon …

Development of a gas chromatographic selected ion monitoring assay for thyroxine (T4) in human serum

DB Ramsden, MJ Farmer - Biomedical mass spectrometry, 1984 - Wiley Online Library
The components of a gas chromatographic mass spectrometric‐selected ion monitoring
(SIM) assay for thyroxine (T4) in human serum are described. The internal standard for the …

[HTML][HTML] Urea and the clinical value of measuring blood urea concentration

C Higgins - Acutecaretesting Org, 2016 - acutecaretesting.org
Urea and the clinical value of measuring blood urea concentration Explore articles by topics
Blood gases/acid-base Cardiac markers Coagulation/fibrinolysis Infection/sepsis Information …

Ultramicrodetermination of plasma urea by reaction with diacetylmonoxime—antipyrine without deproteinization

G Ceriotti - Clinical Chemistry, 1971 - academic.oup.com
Urea can be directly determined in serum or plasma by reaction with diacetylmonoxime—
antipyrine: 5 µl of the sample is mixed with 5 ml of the chromogenic reagent, and the mixture …