Original scientific paper

Investigation of Subsystems of Colloidal Agl by Radioactive Tracer Technique

R. Despotović ; »Ruder Boskovic« Institute, Box 1016, 41001 Zagreb, Croatia, Yugoslavia
B. Subotić ; »Ruder Boskovic« Institute, Box 1016, 41001 Zagreb, Croatia, Yugoslavia

Abstract

Stable silver iodide sols were prepared in statu nascendi, i.e.
by direct mixing of precipitation components. The sols contained
0.0001, 0.001 or 0.01 M Nal (pl = 4, 3 or 2) and 0.0001, 0.001 or 0.01
M/l Agl at 293 K. The following subsystem fractions were separated
from the stable silver iodide suspensions by radioactive tracer technique
with superspeed Sorvall SS-1 centrifuge and Beckman
Model L Preparative ultracentrifuge: embrional, metaphasic, and
roughly dispersed silver iodide. Formation and transformation of
each subsystem was examined under various conditions (pl, age of
sols, addition of coagulation electrolyte Mg-nitrate). The results
described reveal a number of simultaneous processes in stable silver
iodide suspensions: the embrya disappear and are transformed into
the metaphase and solid phase; the methoric mass also disappears
turning into the solid phase, i. e. the silver iodide particles grow.
The method employed is described in detail and the results obtained
show the dependence of the silver iodide subsystem structure on its
age and conditions at which it is formed.

Keywords

Hrčak ID:

197034

URI

https://hrcak.srce.hr/197034

Publication date:

30.6.1973.

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