Naslov
Precipitation and solubility of calcium hidrogen urate hexahidrate

Autori
Füredi-Milhofer, Helga ; Babić-Ivančić, Vesna ; Brničević, Nevenka ; Uzelac, M.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts, XXIV International Conference on Coordination Chemistry / Konstantatos, A. ; Mertis, K. ; Panayotou, M. ; Papavissiliou, G. ; Pnevmatikakis, G. ; Tsatsas, A. Vrachou-Astra, E. - Atena : Association of Greek Chemists, 1986, D2-701

Skup
XXIV International Conference on Coordination Chemistry

Mjesto i datum
Atena, Grčka, 24.08.1986. - 29.08.1986

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
urate; preparation; X-ray diffraction

Sažetak
The composition, conditions of precipitation and solubility of calcium urate are of considerate interest becouse of their possible occurence in renal calculi. However solubility data are not yet available and there is moreover considerable confusion in the literatue concerning the exact chemical composition of such a compound. In this work calcium hydrogen urate hexahydrate, (Ca(C_5H_3O_3N_4)_2x6H_2O ; Ca(HU)_2x6H_2O) was prepared by dissolvong anhydrous uric acid in aqueous solutions of calcium hydroxide and xydrochloric acid. Pure crystals of the compound, as characterized by X-ray diffraction powder patterns, chemical and thermogravimetric analysis, were obtained in the range of pH 7 less-than or equal to pH less-than or equal to 10 and uric acid concentration 10^-2 greater-than or equal to H_2U greater than or equal to 10^-3 at calcium/uric molar rations 1.1 - 1.5. Exact conditions of preparation of Ca(HU)_2x6H_2O and data on its solubility in aqeous solutions are given. The anhidrous form. CaC_5H_3O_3N_4, has also been prepared and characterized.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA