Urea ( Berthelot Method )
Clinical significance :- Urea is the end product of the protein metabolism. It is synthesized in the liver form the ammonia produced by the catabolism of amino acids. It is transported by the blood to the kidney from where it is excreted. Increased level are found in renal diseases, urinary obstructions, shock, congestive heart failure and burns. Decrease level are found in liver failure and due to pregnancy. Principle :- Urea hydrolyzes urea to ammonia and CO2 . The ammonia formed react with a phenolic chromogen and hypochlorite to form a green coloured complex . Intensity of the colour formed is directly proportional to the amount of Urea present in the sample. Material required :- Clean and dry glassware. ...