Determination of free haemoglobin in serum by an automated assay using 4-aminophenazone and the Cobas Bio System.
A colorimetric method for the determination of free haemoglobin in human serum is described, using 4-aminophenazone as chromogen, and commercially available haemiglobin cyanide solutions as standards. The reaction system is suitable for manual measurements as well as determinations with a centrifugal analyser (Cobas Bio System). Accuracy, linearity and stability of the procedure is shown. A reference interval in sera of normal adults was established, with an upper limit of 5 mg/dl. The alternative use of heparin plasma instead of serum is discussed.
D000632:Aminopyrine; D001322:Autoanalysis; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D007700:Kinetics; D013053:Spectrophotometry / Q000379:methods
D006454:Hemoglobins; D000632:Aminopyrine