For the determination of urea over the range 3.3–50 mM, a gas-permeable layer of the strip allows the ammonia generated from urease-catalysed hydrolysis to modify the colour of an indicator and the reflectance is measured at 642 nm.
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1 jan 2019 · This review presents the principles of various analytical methods for determination of urea with special emphasis on biosensors. The use of ...
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 ...
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Urea Assay Kit III sufficient for 100 colorimetric tests for detection of urea in biological samples.
Direct methods for urea determination are instead commonly based on urea complexation with a ketone or an aldehyde (such as xanthydrol or diacetyl monoxime), ...
Abstract. Combinations of reagents are described for the catalyzed indophenol reaction for the determination of ammonia, which produces a stable blue color.
-l procedure for the analysis of urea requires eight steps. 1. Transfer a 20.0 ml aliquot of sample, which should be colorleris, free from solid matter, and at ...
8 mei 2015 · This study optimized the experimental conditions for the analysis of dissolved urea in seawater. The kinetics of the colorimetric reaction ...
Urea is an essential molecule usually detected using spectroscopy, particularly ultraviolet and visible spectroscopy (UV-vis). However, its detection ...