CCLXXXIX.—Electrometric studies of the precipitation of hydroxides. Part III. Precipitation in the cerite group of rare earths and of yttrium hydroxide by use of the hydrogen electrode

Food Additives, Metal Binding Properties of Bacitracin

“…Odorous compounds were known to be present in the "water fraction." 1 Present address, Department of Food and Nutrition, Ochanomizu University, Tokyo, Japan.…”

“…Each solution, adjusted to pH 5, contained 0.24 mg. of bacitracin per ml. in combination with metal ion in the ratio 1 gram atom of metal ion per 1422 grams of bacitracin. The absorption of metal bacitracin solutions was measured in the Beckman Model DU spectrophotometer against the corresponding metal salt solution containing no bacitracin.…”

The Basicity Characteristics of Scandium, Yttrium, and the Rare Earth Elements.

“…As experimental evidence for the relatively high basicities of the oxides of these elements, one can cite the ease with which even the strongly ignited oxides of all but scandium dissolve in acids (66,79,250,263,285,305,416); dissolve in ammonium salt solutions with the liberation of ammonia (20,21,45,244,250,263,343); dissolve in aniline hydrochloride solutions (233); react with such hightemperature acids as ammonium salts (5,146,147,181,351,352,394,450), borax (31,154), metaphosphate (31), and alkali bisulfate (231,363) or pyrosulfate (11, 212); and absorb atmospheric carbon dioxide (114,250,263,278,285). To these can be added the comparatively high water solubilities and precipitation pH values of the hydrous oxides and hydroxides (64,65,74,167,222,297,327,361,389,398), the tendencies of at least some of the oxides to slake with water (244, 250, 278, 285), the absorption of carbon dioxide by hydrous lanthanum (12,...…”

Potentiometric Titrations

“…Britton (27,29,30) has made an extensive study of the precipitation of hydroxides, chromates, silicates, etc., with the aid of the hydrogen or oxygen electrode as indicator. A summary of Britton's findings is shown graphically in (1) Cadmium micro-reductor.…”