Abstract:Urinary determinations of riboflavine were done with the methods of Emmerie, Ferrebee and Najjar. Recovery experiments gave better results with the method of Ferrebee and the modification of Najjar. Some details are presented and calibration curves are constructed for the use of the Pulfrich fotometer and the pfalz and Bauer fluorphotometer. In two normal cases it was observed that the excretion of riboflavine is great after 2 to 5hs of the injection of 1mg. of synthetic riboflavine. N… Show more
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