solid material senk into the organic phase, and liguid fallout remained
in the aqueous phase. The Aerosol OT, a wetting agent, was used to
lower the interfacial tension thereby permitting the solid particles
to descend into the chlorobenzene solution. Versene is an agent used
to preferentially complex any cations in the aqueous phase and to limit
any distribution of. the cations between the two chases. Carbon
tetrachloride was used to mininize emulsification in the chlorobenzene.
& beg of desiccant was placed in the chlorobenzene solution to absorb
any moisture present in the orgenie phase. (F1z. 3.3)
Fig. 3.3 Interior of Two-Fhase Collector with Chlorobenzene
‘
and Desiccant in Place
Since the efficiency of the collector was dependent upon the
concentration of the wetting agent and complexing agent, a reservoir
was mounted on the side of the collector to counteract the idiluticn
of the aqueous phase by anyrainfall thet might occur during the col-~
lection period.
This second container was equipped with a & 1/2-in
diameter funnel to which a condom was connected inside the container.
If the rain fell into the collector, a comparable amount fell into the
funnel, thereby swelling the condom.
This would displace a 16 per cent
Aerosol, '+ per cent Versene solution from the container into the col-
lector, thus keeping the oricinal concentrations in the aqueous phase
constant.
The mouth of the funnel was exposed only when the cover of
the collector was open.
18
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