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Up to five
(5) platinum crucibles are loaded with a few grams of powdered sample, an
appropriate flux and often other agents. The crucibles are inserted into the
crucible holders.
Platinum
molds are then installed onto the mold holder.
When the
user instructs the K2 to launch the actual fusion, the oven door automatically
opens, the platinumware holders enter the oven, the door closes and all heating
steps are automatically started in sequence. Temperature is constantly monitored
and displayed.
The
back-and-forth rocking of the crucible holder continuously mixes the flux with
the sample.
When the flux melts, it starts dissolving the sample. When all
sample is dissolved, the oven door opens, the platinumware holders move forward
and, during the time the door closes, the crucibles are tilted forward to empty
their contents into the molds. Fans located underneath cools the molds, while the oven remains
powered, to gain time. When the molds are completely cooled, the user picks up
perfectly homogenous glass beads, ready for analysis by XRF.
For solution preparation, the hot melt is poured into
unbreakable beakers (instead of molds), which contains an acid stirred by a
built-in magnetic system.
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