Abstract: An improved method and means for carbonating water includes an inexpensive pressure vessel that operates at low fluid pressures, and that is selectively vented of accumulated atmospheric gases to maintain high carbonating efficiency. Supplemental gasification of the dispensed liquid and selective cooling techniques used on the inlet water and on the carbonator promote high-level carbonation on low volume usage of pressurized carbon dioxide gas. Post-mix apparatus and method produce flavored soft drinks with only minimum additional equipment.

Abstract: A method and catalyst for the determination of nitrate in water which has been obtained by reduction of a solution of a salt of a transition metal or group VIII of the periodic system and a transition metal salt of the copper group in the presence of an acid. The nitrate determination is effected by determining the nitrate extinction of a sample of water as compared with a blank sample in the UV region at 210 nm, a part of the sample of water whose nitrate has been reduced in the presence of hydrogen with the use of the catalyst of the invention being employed as blank sample.