Article Text

Download PDFPDF
An improved method for the simple and accurate colorimetric determination of urea with Ehrlich's reagent
  1. H. Yatzidis,
  2. M. Garidi,
  3. C. Vassilikos,
  4. D. Mayopoulou,
  5. A. Akilas
  1. Second Department of Medicine, University of Athens Medical School
  2. Hippocratean Hospital


    An improved method for the colorimetric determination of urea is described. The method is simple, requiring a deproteinized filtrate obtained after treatment of a small quantity of whole oxalated blood, serum, plasma or urine with 12·5% trichloracetic acid containing 50 g. activated carbon. The addition of Ehrlich's reagent to this filtrate results in the immediate production of a stable yellow colour. The determination is accurate, very sensitive and rapid, taking place in only 10 minutes.

    Statistics from

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.