30
6.2
Mix thoroughly with the sample. (Try to leave the bottom layer of flux
untouched.)
7.
Add the non-wetting agent if it is not already integrated within the flux. Solid
non-wetting agent should be thoroughly mixed with the flux. Making an
aqueous solution with the solid salts can also prove very convenient, and can
be pipetted on top of the dry ingredients.
8.
Place crucibles in the holders.
Important:
make sure that they are properly
installed. See page 27,
, for details.
9.
Place molds on their holder.
Important:
do not forget to install a mold under
each crucible. See page 29,
, for details.
10.
Touch Start to launch the fusion. If the preset temperature is not yet reached
in the furnace, a few minutes’ delay will allow sufficient heating, then the
holders will automatically enter the furnace. The door opens and closes
automatically.
11.
Upon heating, the sample reacts if an oxidizer is present. Then, the flux melts
and dissolves the sample. The mold is heated at the same time. At the end,
the door opens to let the crucibles out, and those are tilted to pour into the
molds. A blower cools the disks.
12.
At the end of the cycle (when the cooling blower turns off), carefully pick up
the glass disks.
Important:
They may still be very hot, depending on the
mold weight and program parameters.
Making
solutions
IMPORTANT:
Before attempting to make solutions, it is important to remove
the middle section of the mold holder, which can otherwise interfere with the top
of the beakers.
IMPORTANT:
Katanax does not recommend attempting to prepare solutions in
a fluxer not fitted with the optional solution magnetic stirrers.
When making a solution, the process is quite similar, but the mold installation
changes for the following:
9.
Place beakers in instrument.
9.1
Fill PTFE beakers with about 100 ml suitable dilute acid. (Nitric acid is the
most commonly used.)
9.2
Add magnetic stirring bars.
9.3
Press the “load beaker” button to slide the platinumware
holders back, against the furnace door.
9.4
Put the beakers on the agitator, in their respective holes.
9.5
Optionally, press the “load beaker” button again, to
move the platinumware holders to the front and clear
the door opening.
The magnetic agitation system is always active.
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