Urobilinogen in Urine as Urobilinogen-Aldehyde
Richard J. Henry, Alberto A. Fernandez, and S. Berkman



In an attempt to complete the standardization of the "quantitative" method for the determination of urobilinogen in urine, recoveries of added urobilin varied erratically between 50 and 80%. Experiments to demonstrate the cause of the low recoveries suggest that urobilin is altered in the reduction procedure by the presence of urine.

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