diazo reaction

di·a·zo re·ac·tion

the reaction of diazotized sulfanilic acid with bilirubin to form azobilirubin, which forms the basis of quantitating the amount of bilirubin in biologic fluids. See: van den Bergh test.

diazo reaction

(dī-ăz′ō)
A deep red color in urine, produced by the action of p-diazobenzene-sulfonic acid and ammonia on aromatic substances found in the urine in certain conditions.
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3) published a method for measuring total serum bilirubin and its fractions by use of bilirubin oxidase (BO) and the diazo reaction.
3) identified novel oxidative metabolites of bilirubin in human urine as substances that are recognized by an anti-bilirubin monoclonal antibody, 24G7, but are negative in the diazo reaction.
05 mL), and Fast Violet B salt, 3 mg; a principle of this procedure is the diazo reaction.
To test the possibility of a diazo reaction with etoposide, we added increasing amounts of etoposide to a control urine and measured the apparent VMA.