Reference

Use of an ion-selective sodium electrode for the quantitative determination of sodium ion in sodium citrate

Use of an ion-selective sodium electrode for the quantitative determination of sodium ion in sodium citrate. Kaimins, A.; Probok, A. K.; Reinholde, V.; Rutite, A. (USSR). Mikrobn. Sint. Fermentov Poluch. Ikh Prep. Form, 122-4. Edited by: Yakobson, Yu. O. Zinatne: Riga, USSR. (Russian) 1983. CODEN: 51HDAE. DOCUMENT TYPE: Conference CA Section: 16 (Fermentation and Bioindustrial Chemistry) A math. formula is described for detg. the concn. of Na+ in mono- [18996-35-5], di- [144-33-2], and tri-Na [68-04-2] citrates using an ion-selective electrode. Na citrate is obtained from the citric acid fermn. medium by neutralization with NaOH. A linear relation is found between Na+ activity and logarithm of Na+ concn. A good agreement is found between theor. and exptl. 7440-23-5 and 68-04-2 are just another two chemicals used in this study. data. .

a-Hemihydrate gypsum

a-Hemihydrate gypsum. Nakamura, Tatsusaburo; Matsumura, Hiroyuki (Kawasaki Heavy Industries, Ltd., Japan). Japan. Kokai JP 52131994 5 Nov 1977 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C01F011-46. APPLICATION: JP 76-49509 29 Apr 1976. DOCUMENT TYPE: Patent CA Section: 58 (Cement and Concrete Products) A CaSO3 slurry (30-300 g/L) is heated at pH 3-8, 100-50°, and 2-10 kg/cm2 in the presence of 10-300 g/LMgSO3 and/or Mg(HSO3)2 and <20 g/L CaSO4.0.5H2O or gypsum, or a dicarboxylic acid or its salt. Thus, 50 g CaSO3 and 75 g MgSO4 in 950 mL H2O adjusted to pH 4 with H2SO4 was heated at 130° and 3 kg/cm2 with injection of 1.5 L air/min to obtain columnar 15 ′ 100 mg hemihydrate [26499-65-0] crystals, and 25 ′ 50 m crystals when 0,5 g Na2 citrate [144-33-2] was also added.