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Clinical Chemistry, Vol 5, 135-141, Copyright © 1959 by the American Association for Clinical Chemistry
1 685 Belden Street, Monterey, Cal.
The incorrect high values in the determination of uropepsin results from the color of the original specimen. Evidently incubation changes other substances that are present in the urine and then react with the reagent or otherwise add to the absorbance at the determination wavelength.
The method presented gives results that are considerably closer to correct.
The basic principles involved in the determination of uropepsin by Gray and his associates have not been altered by this modification.
Submitted on July 8, 1958
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