Croatica Chemica Acta, Vol. 47 No. 4, 1975.
Original scientific paper
On Silver Iodide Suspensions
R. Despotović
; Laboratory of Colloid Chemistry, Institute »Ruder Boskovic«, 41001 Zagreb, P. 0. Box 1016, Croatia, Yugoslavia
N. Filipović-Vinceković
; Laboratory of Colloid Chemistry, Institute »Ruder Boskovic«, 41001 Zagreb, P. 0. Box 1016, Croatia, Yugoslavia
D. Mayer
; Laboratory of Colloid Chemistry, Institute »Ruder Boskovic«, 41001 Zagreb, P. 0. Box 1016, Croatia, Yugoslavia
Abstract
In order to determine the exact cr.itical coagulation concentration
ck (the lowest concentration of present electrolyte at
which the colloid stability begins to decrease), the coagulation concentration
cc (lowest electrolyte concentration causing total sedimentation
of the suspension particles), the critical stabilization
concentration cs (lowest electrolyte concentration causing an increase
of colloid stability or peptization) and the stabilization
concentration sc (lowest electrolyte concentration at which all
the colloid particles are suspended) an experimental method was
developed. As a model system silver iodide sols with magnesium
nitrate and with n-laurylamine in the presence of sodium iodide
were applied. By radiometric analysis of the distribution of
constituent ions between the crystal lattice and the electrolyte,
and by centrifugation of samples at various relative centrifugal
forces it is possible to determine the real coagulation concentration
cc and the real stabilization concentration sc exactly, as shown for
the investigated systems.
Keywords
Hrčak ID:
196575
URI
Publication date:
16.2.1976.
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