The reduction of chromium (VI) to chromium(III) by D-galacturonic acid takes place to a significant extent only in the presence of metal ions such as copper(II) or chromium(III) itself. These metals can form stable complexes in which the opening of the sugar ring leads to a reducing free aldehydic group. The stoichiometry of the reaction, the dependence of the yield on the nature of the metal ion and the pH of the solution and the products formed, were studied. Stoichiometries and stability constants of the complexes present in the system chromium(III)-D-galacturonic acid were evaluated.
Analytical study of the reduction of chromium(VI) by D- galacturonic acid / Deiana, Salvatore Andrea; C., Gessa; Usai, Marianna; P., Piu; Seeber, R.. - In: ANALYTICA CHIMICA ACTA. - ISSN 0003-2670. - 248:1(1991), pp. 301-305. [10.1016/S0003-2670(00)80899-5]
Analytical study of the reduction of chromium(VI) by D- galacturonic acid
DEIANA, Salvatore Andrea;USAI, Marianna;
1991-01-01
Abstract
The reduction of chromium (VI) to chromium(III) by D-galacturonic acid takes place to a significant extent only in the presence of metal ions such as copper(II) or chromium(III) itself. These metals can form stable complexes in which the opening of the sugar ring leads to a reducing free aldehydic group. The stoichiometry of the reaction, the dependence of the yield on the nature of the metal ion and the pH of the solution and the products formed, were studied. Stoichiometries and stability constants of the complexes present in the system chromium(III)-D-galacturonic acid were evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
