Buchi E-800 - Twisselmann Extraction (with Chamber Heater); Description of the Analyte Protection

3 | Product description BÜCHI Labortechnik AG
16/88 Operation Manual UniversalExtractor E-800
3.1.6 Twisselmann Extraction (with chamber heater)
Step 1 extraction
 The sample is located in the extraction chamber.
 The beaker contains the solvent.
 The magnetic valve is closed, the solvent is collected in the extraction
chamber. The solvent is heated, vapor rises up to the condenser,
condenses, and drops back through the sample into the extraction
chamber.
Step 2 rinsing
 The solvent is heated, vapor rises up to the condenser, condenses
and drops into the extraction chamber with the sample.
 The magnetic valve is open, the solvent flows back into beaker, the
solvent is not collected.
 This flushes traces of analyte into the beaker.
Step 2 drying
 The solvent is heated, vapor rises up around the sample to the con-
denser, condenses and flows into the tank bottle.
 The analyte remains in the beaker.
3.1.7 Description of the analyte protection
The Analyte Protection protects the analyte from overheating.
NOTE
The presence of beaker and solvent is always detected wether the Analyte Protec-
tion is activated or deactivated.
The Analyte Protection triggers under the following situations:
Economic
Continu-
ous
Extrac-
tion
(without
chamber
heater)
Soxhlet
Extrac-
tion
(with and
without
chamber
heater)
Continu-
ous
Extrac-
tion
(with and
without
chamber
heater)
Hot
Extrac-
tion
(with
chamber
heater)
Soxhlet
Warm
Extrac-
tion
(with
chamber
heater)
Twissel-
mann
Extrac-
tion
(with
chamber
heater)
Presence of
beaker
X X X X X X
Presence of
solvent
(Level check)
X X X X X X
Extraction
step
X¹ X¹ X¹ X¹ X¹ X¹
Rinse step - X¹ - X¹ X¹ X¹
Dry step X¹ X¹ X¹ X¹ X¹ X¹
¹ optional activation Inertgas