IN an earlier communication [Birch and Dann, 1933] on the estimation and distribution of ascorbic acid and glutathione in animal tissues we drew attention to the distribution of ascorbic acid in organs other than the suprarenal cortex, as detected by the indophenol reagent. The presence in a number of tissues of reducing substances other than glutathione had become evident from the work of Maso...

superior speed and simplicity with little sacrifice in accuracy and precision. Phenytoin sodium (DPH) forms phenytoin silver collosol quantitatively with silver nitrate solution. The reaction between phenytoin sodium and silver nitrate reveals a 1 : 1 molar ratio as illustrated in Chart 1. However, there was no accurate method available to determine the titration end-point. Therefore, gravimetr...