Ehrlich benzaldehyde reaction
Definition: a test for urobilinogen in the urine by dissolving 2 g of dimethyl-p-aminobenzaldehyde in 100 mL of 5% hydrochloric acid and adding this reagent to urine; a red color in the cold indicates the presence of an excessive amount of urobilinogen.
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Examples: glitazone, GI cocktail, etc.
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