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Coso4 7h20
Coso4 7h20











Absorbances of the samples and of the sets of standards having the same concentrations of the matrix, were measured under the same conditions. The microcomponents (Fe, Ni, Cu, Zn, Cd, Mn, Mg and Ca) were determined by means of direct atomic absorption spectrometry (Perkin Elmer 3300 Atomic Absorption Spectrometer) from 0.1423 mol/L (or less) solutions of CoSO 4 in 0.02 mol/L sulfuric acid. (POCh ­ Gliwice) were usedĪpparatus: Atomic absorption spectrometer model 3300 manufactured by Perkin Elmer was applied.Īnalytical methods: The macrocomponent: cobalt(II) was determined by complexometric titration with sodium versenate in ammonia acetate buffer solution in the presence of murexide. (POCh ­ Gliwice) ­ saturated water solution and murexide ind. (POCh ­ Gliwice) ­ 0.1 M water solution, hydrazinum sulfate p.a. Ammonia solution (14 M) was obtained by saturating distilled water with ammonia gas. Standard solutions of Fe(II), Zn(II), Cu(II), Cd(II), Mg(II), Ni(II), Mn(II) sulfates and Ca(II) nitrate were used. (POCh ­ Gliwice) was additionally purified by crystallization. Reagents and solutions: Cobalt(II) sulfate heptahydrate, p.a.

coso4 7h20

The equilibrium cocrystallization coefficients D M/CoSO4.7H2O of low amounts (10 -3- 10 -1%w/w) of M 2+ ions (M 2+ = ) with CoSO 47H 2O as well as to find out the influence of physicochemical and crystal-chemical properties of both sulfate hydrates (CoSO 47H 2O and MSO 47H 2O) as well as M 2+ ions on D M/CoSO4.7H2O coefficients. (Received: Octo­ Accepted: March 29, 2003)

coso4 7h20 coso4 7h20

Institute of Chemistry, Inorganic Technology and Electrochemistry Soc., 48, N 3 (2003) ISSN 0717-9324 COCRYSTALLIZATION OF LOW AMMOUNTS OF M 2+ IONS DURING













Coso4 7h20