title: THE COMBINATION OF A STANDARD GELATIN PREPARATION WITH HYDROCHLORIC ACID AND WITH SODIUM HYDROXIDE.
abstract: It has been found possible to obtain constant dry weights of sheet gelatin only by drying in vacuo at temperatures below 100 degrees C. for a period of several weeks. Values are given for the ash and nitrogen content, the specific conductivity, and the isoelectric point of a standard gelatin preparation. By the method of E.M.F. measurements of cells without liquid junction, of the type Ag, AgCl, HCl + gelatin, H(2), it has been found that this gelatin in 0.1 M HCl combines with a maximum of 9.58 x 10(-4) equivalents of H(+) and 2.0 x 10(-4) equivalents of Cl(-). By means of pH measurements with the hydrogen electrode and a KCl junction, the combination curve of this gelatin with H(+) from HCl and OH(-) from NaOH has been determined between pH 1.1 and 12.5.
authors.affiliation: Department of Physiology, Yale University, New Haven.
authors.forename: D I
authors.initials: DI
authors.lastname: Hitchcock