Simultaneous determination of total and free metal ion concentration in solution of unknown composition by sorption on iminodiacetic resin
Articolo
Data di Pubblicazione:
1995
Abstract:
A method for determining the total concentration of a
metal ion originally present in a solution, ctot, and the ratio
of total to free metal ion, ZM, is proposed. It consists of
putting different aliquots of the sample (V) in contact with
the resin (w) in batch, by keeping the acidity constant,
and determining the concentration of the sorbed metal ion
c. Then 1/c is plotted against V/w, and ctot and ZM are
calculated from the straight line obtained. The chemical
model that allows evaluation of the ratio of total to free
metal ion is illustrated and discussed. Some synthetic
systems are examined to demonstrate the validity of the
procedure.
metal ion originally present in a solution, ctot, and the ratio
of total to free metal ion, ZM, is proposed. It consists of
putting different aliquots of the sample (V) in contact with
the resin (w) in batch, by keeping the acidity constant,
and determining the concentration of the sorbed metal ion
c. Then 1/c is plotted against V/w, and ctot and ZM are
calculated from the straight line obtained. The chemical
model that allows evaluation of the ratio of total to free
metal ion is illustrated and discussed. Some synthetic
systems are examined to demonstrate the validity of the
procedure.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
total and free metal; iminodiacetic resin; Gibbs-Donnan model
Elenco autori:
Pesavento, Maria; Biesuz, Raffaela
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