Wet Acid Digestion System Buchi B-440 + B-412
Complies with IEC1010
Wet acid digestion and sulphated ash determinations are procedures
which are in common use in analytical laboratories, particularly in the
pharmaceutical industry. These procedures, when carried out in open
systems such as fume cupboards lead to corrosion of extraction
systems and environmental pollution. This new Buchi system allows the
procedures to be carried out in a closed environment in which acid
fumes are extracted and neutralised via a scrubbing unit before clean
air is released into the atmosphere. For sulphated ash determinations
samples may be transferred to a muffle furnace for final high
temperature ashing after all acid fumes have been removed.
The system consists of the new Wet Digestion B-440 and the proven
Scrubber Unit B-412. The Wet Digestor allows up to six samples to be
processed simultaneously in ceramic crucibles which are available in
three sizes, 30, 55 or 95ml capacity.
The samples are enclosed in the glass fume extraction hood and are
visible at all times; fumes are extracted and neutralised in the B-412
Scrubber Unit.
Crucibles are heated by means of a quartz halogen tubular lamp which
can quickly achieve the maximum digestion temperature of 600°C. Up
to nine different time/temperature profiles may be programmed and
stored for repeated use. Each profile consists of five time/temperature
steps with time units selectable in 1 minute intervals up to 240 minutes
and temperature units selectable in 1°C increments up to 600°C.
Program number, step sequence, time and temperature are digitally
displayed on the control panel.
Systems are supplied complete with Wet Acid Digestor B-440, Scrubber
B-412, condensate trap, Viton® connection tubing, ceramic plate,
corresponding ceramic crucibles and operating instructions.